openwrt/staging/blogic.git
7 years agotcp: fix tcp_mtu_probe() vs highest_sack
Eric Dumazet [Tue, 31 Oct 2017 06:08:20 +0000 (23:08 -0700)]
tcp: fix tcp_mtu_probe() vs highest_sack

Based on SNMP values provided by Roman, Yuchung made the observation
that some crashes in tcp_sacktag_walk() might be caused by MTU probing.

Looking at tcp_mtu_probe(), I found that when a new skb was placed
in front of the write queue, we were not updating tcp highest sack.

If one skb is freed because all its content was copied to the new skb
(for MTU probing), then tp->highest_sack could point to a now freed skb.

Bad things would then happen, including infinite loops.

This patch renames tcp_highest_sack_combine() and uses it
from tcp_mtu_probe() to fix the bug.

Note that I also removed one test against tp->sacked_out,
since we want to replace tp->highest_sack regardless of whatever
condition, since keeping a stale pointer to freed skb is a recipe
for disaster.

Fixes: a47e5a988a57 ("[TCP]: Convert highest_sack to sk_buff to allow direct access")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Reported-by: Roman Gushchin <guro@fb.com>
Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: addrconf: increment ifp refcount before ipv6_del_addr()
Eric Dumazet [Tue, 31 Oct 2017 05:47:09 +0000 (22:47 -0700)]
ipv6: addrconf: increment ifp refcount before ipv6_del_addr()

In the (unlikely) event fixup_permanent_addr() returns a failure,
addrconf_permanent_addr() calls ipv6_del_addr() without the
mandatory call to in6_ifa_hold(), leading to a refcount error,
spotted by syzkaller :

WARNING: CPU: 1 PID: 3142 at lib/refcount.c:227 refcount_dec+0x4c/0x50
lib/refcount.c:227
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3142 Comm: ip Not tainted 4.14.0-rc4-next-20171009+ #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x41c kernel/panic.c:181
 __warn+0x1c4/0x1e0 kernel/panic.c:544
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:refcount_dec+0x4c/0x50 lib/refcount.c:227
RSP: 0018:ffff8801ca49e680 EFLAGS: 00010286
RAX: 000000000000002c RBX: ffff8801d07cfcdc RCX: 0000000000000000
RDX: 000000000000002c RSI: 1ffff10039493c90 RDI: ffffed0039493cc4
RBP: ffff8801ca49e688 R08: ffff8801ca49dd70 R09: 0000000000000000
R10: ffff8801ca49df58 R11: 0000000000000000 R12: 1ffff10039493cd9
R13: ffff8801ca49e6e8 R14: ffff8801ca49e7e8 R15: ffff8801d07cfcdc
 __in6_ifa_put include/net/addrconf.h:369 [inline]
 ipv6_del_addr+0x42b/0xb60 net/ipv6/addrconf.c:1208
 addrconf_permanent_addr net/ipv6/addrconf.c:3327 [inline]
 addrconf_notify+0x1c66/0x2190 net/ipv6/addrconf.c:3393
 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x32/0x60 net/core/dev.c:1697
 call_netdevice_notifiers net/core/dev.c:1715 [inline]
 __dev_notify_flags+0x15d/0x430 net/core/dev.c:6843
 dev_change_flags+0xf5/0x140 net/core/dev.c:6879
 do_setlink+0xa1b/0x38e0 net/core/rtnetlink.c:2113
 rtnl_newlink+0xf0d/0x1a40 net/core/rtnetlink.c:2661
 rtnetlink_rcv_msg+0x733/0x1090 net/core/rtnetlink.c:4301
 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2408
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4313
 netlink_unicast_kernel net/netlink/af_netlink.c:1273 [inline]
 netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1299
 netlink_sendmsg+0xa4a/0xe70 net/netlink/af_netlink.c:1862
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2049
 __sys_sendmsg+0xe5/0x210 net/socket.c:2083
 SYSC_sendmsg net/socket.c:2094 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2090
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x7fa9174d3320
RSP: 002b:00007ffe302ae9e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffe302b2ae0 RCX: 00007fa9174d3320
RDX: 0000000000000000 RSI: 00007ffe302aea20 RDI: 0000000000000016
RBP: 0000000000000082 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe302b32a0
R13: 0000000000000000 R14: 00007ffe302b2ab8 R15: 00007ffe302b32b8

Fixes: f1705ec197e7 ("net: ipv6: Make address flushing on ifdown optional")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ahern <dsahern@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotun/tap: sanitize TUNSETSNDBUF input
Craig Gallek [Mon, 30 Oct 2017 22:50:11 +0000 (18:50 -0400)]
tun/tap: sanitize TUNSETSNDBUF input

Syzkaller found several variants of the lockup below by setting negative
values with the TUNSETSNDBUF ioctl.  This patch adds a sanity check
to both the tun and tap versions of this ioctl.

  watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [repro:2389]
  Modules linked in:
  irq event stamp: 329692056
  hardirqs last  enabled at (329692055): [<ffffffff824b8381>] _raw_spin_unlock_irqrestore+0x31/0x75
  hardirqs last disabled at (329692056): [<ffffffff824b9e58>] apic_timer_interrupt+0x98/0xb0
  softirqs last  enabled at (35659740): [<ffffffff824bc958>] __do_softirq+0x328/0x48c
  softirqs last disabled at (35659731): [<ffffffff811c796c>] irq_exit+0xbc/0xd0
  CPU: 0 PID: 2389 Comm: repro Not tainted 4.14.0-rc7 #23
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
  task: ffff880009452140 task.stack: ffff880006a20000
  RIP: 0010:_raw_spin_lock_irqsave+0x11/0x80
  RSP: 0018:ffff880006a27c50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
  RAX: ffff880009ac68d0 RBX: ffff880006a27ce0 RCX: 0000000000000000
  RDX: 0000000000000001 RSI: ffff880006a27ce0 RDI: ffff880009ac6900
  RBP: ffff880006a27c60 R08: 0000000000000000 R09: 0000000000000000
  R10: 0000000000000001 R11: 000000000063ff00 R12: ffff880009ac6900
  R13: ffff880006a27cf8 R14: 0000000000000001 R15: ffff880006a27cf8
  FS:  00007f4be4838700(0000) GS:ffff88000cc00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000020101000 CR3: 0000000009616000 CR4: 00000000000006f0
  Call Trace:
   prepare_to_wait+0x26/0xc0
   sock_alloc_send_pskb+0x14e/0x270
   ? remove_wait_queue+0x60/0x60
   tun_get_user+0x2cc/0x19d0
   ? __tun_get+0x60/0x1b0
   tun_chr_write_iter+0x57/0x86
   __vfs_write+0x156/0x1e0
   vfs_write+0xf7/0x230
   SyS_write+0x57/0xd0
   entry_SYSCALL_64_fastpath+0x1f/0xbe
  RIP: 0033:0x7f4be4356df9
  RSP: 002b:00007ffc18101c08 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
  RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4be4356df9
  RDX: 0000000000000046 RSI: 0000000020101000 RDI: 0000000000000005
  RBP: 00007ffc18101c40 R08: 0000000000000001 R09: 0000000000000001
  R10: 0000000000000001 R11: 0000000000000293 R12: 0000559c75f64780
  R13: 00007ffc18101d30 R14: 0000000000000000 R15: 0000000000000000

Fixes: 33dccbb050bb ("tun: Limit amount of queued packets per device")
Fixes: 20d29d7a916a ("net: macvtap driver")
Signed-off-by: Craig Gallek <kraig@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: i2c: Fix buffer increment counter for write transaction
Vadim Pasternak [Wed, 1 Nov 2017 11:10:42 +0000 (12:10 +0100)]
mlxsw: i2c: Fix buffer increment counter for write transaction

It fixes a problem for the last chunk where 'chunk_size' is smaller than
MLXSW_I2C_BLK_MAX and data is copied to the wrong offset, overriding
previous data.

Fixes: 6882b0aee180 ("mlxsw: Introduce support for I2C bus")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec
David S. Miller [Wed, 1 Nov 2017 10:27:46 +0000 (19:27 +0900)]
Merge branch 'master' of git://git./linux/kernel/git/klassert/ipsec

Steffen Klassert says:

====================
pull request (net): ipsec 2017-11-01

1) Fix a memleak when a packet matches a policy
   without a matching state.

2) Reset the socket cached dst_entry when inserting
   a socket policy, otherwise the policy might be
   ignored. From Jonathan Basseri.

3) Fix GSO for a IPsec, GRE tunnel combination.
   We reset the encapsulation field at the skb
   too erly, as a result GRE does not segment
   GSO packets. Fix this by resetting the the
   encapsulation field right before the
   transformation where the inner headers get
   invalid.

Please pull or let me know if there are problems.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: reg: Add high and low temperature thresholds
Ido Schimmel [Mon, 30 Oct 2017 09:51:18 +0000 (10:51 +0100)]
mlxsw: reg: Add high and low temperature thresholds

The ASIC has the ability to generate events whenever a sensor indicates
the temperature goes above or below its high or low thresholds,
respectively.

In new firmware versions the firmware enforces a minimum of 5
degrees Celsius difference between both thresholds. Make the driver
conform to this requirement.

Note that this is required even when the events are disabled, as in
certain systems interrupts are generated via GPIO based on these
thresholds.

Fixes: 85926f877040 ("mlxsw: reg: Add definition of temperature management registers")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMAINTAINERS: Remove Yotam from mlxfw
Yuval Mintz [Mon, 30 Oct 2017 09:41:37 +0000 (11:41 +0200)]
MAINTAINERS: Remove Yotam from mlxfw

Provide a mailing list for maintenance of the module instead.

Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMAINTAINERS: Update Yotam's E-mail
Yotam Gigi [Mon, 30 Oct 2017 09:41:36 +0000 (11:41 +0200)]
MAINTAINERS: Update Yotam's E-mail

For the time being I will be available in my private mail. Update both the
MAINTAINERS file and the individual modules MODULE_AUTHOR directive with
the new address.

Signed-off-by: Yotam Gigi <yotam.gi@gmail.com>
Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns: set correct return value
Pan Bian [Mon, 30 Oct 2017 08:50:01 +0000 (16:50 +0800)]
net: hns: set correct return value

The function of_parse_phandle() returns a NULL pointer if it cannot
resolve a phandle property to a device_node pointer. In function
hns_nic_dev_probe(), its return value is passed to PTR_ERR to extract
the error code. However, in this case, the extracted error code will
always be zero, which is unexpected.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: lapbether: fix double free
Pan Bian [Sun, 29 Oct 2017 13:57:22 +0000 (21:57 +0800)]
net: lapbether: fix double free

The function netdev_priv() returns the private data of the device. The
memory to store the private data is allocated in alloc_netdev() and is
released in netdev_free(). Calling kfree() on the return value of
netdev_priv() after netdev_free() results in a double free bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: remove SK_REDIRECT from UAPI
John Fastabend [Wed, 1 Nov 2017 02:17:31 +0000 (19:17 -0700)]
bpf: remove SK_REDIRECT from UAPI

Now that SK_REDIRECT is no longer a valid return code. Remove it
from the UAPI completely. Then do a namespace remapping internal
to sockmap so SK_REDIRECT is no longer externally visible.

Patchs primary change is to do a namechange from SK_REDIRECT to
__SK_REDIRECT

Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: phy: marvell: Only configure RGMII delays when using RGMII
Andrew Lunn [Tue, 31 Oct 2017 19:31:28 +0000 (20:31 +0100)]
net: phy: marvell: Only configure RGMII delays when using RGMII

The fix 5987feb38aa5 ("net: phy: marvell: logical vs bitwise OR typo")
uncovered another bug in the Marvell PHY driver, which broke the
Marvell OpenRD platform. It relies on the bootloader configuring the
RGMII delays and does not specify a phy-mode in its device tree.  The
PHY driver should only configure RGMII delays if the phy mode
indicates it is using RGMII. Without anything in device tree, the
mv643xx Ethernet driver defaults to GMII.

Fixes: 5987feb38aa5 ("net: phy: marvell: logical vs bitwise OR typo")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'wireless-drivers-for-davem-2017-10-31' of git://git.kernel.org/pub/scm...
David S. Miller [Wed, 1 Nov 2017 01:51:36 +0000 (10:51 +0900)]
Merge tag 'wireless-drivers-for-davem-2017-10-31' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for 4.14

The most important here is the security vulnerabitility fix for
ath10k.

ath10k

* fix security vulnerability with missing PN check on certain hardware

* revert ath10k napi fix as it caused regressions on QCA6174

wcn36xx

* remove unnecessary rcu_read_unlock() from error path
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge ath-current from ath.git
Kalle Valo [Tue, 31 Oct 2017 14:26:48 +0000 (16:26 +0200)]
Merge ath-current from ath.git

ath.git fixes for 4.14. Major changes:

ath10k

* fix security vulnerability with missing PN check on certain hardware

* revert ath10k napi fix as it caused regressions on QCA6174

wcn36xx

* remove unnecessary rcu_read_unlock() from error path

7 years agoxfrm: Fix GSO for IPsec with GRE tunnel.
Steffen Klassert [Mon, 30 Oct 2017 09:04:04 +0000 (10:04 +0100)]
xfrm: Fix GSO for IPsec with GRE tunnel.

We reset the encapsulation field of the skb too early
in xfrm_output. As a result, the GRE GSO handler does
not segment the packets. This leads to a performance
drop down. We fix this by resetting the encapsulation
field right before we do the transformation, when
the inner headers become invalid.

Fixes: f1bd7d659ef0 ("xfrm: Add encapsulation header offsets while SKB is not encrypted")
Reported-by: Vicente De Luca <vdeluca@zendesk.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 years agotc-testing: fix arg to ip command: -s -> -n
Brenda J. Butler [Mon, 30 Oct 2017 21:59:22 +0000 (17:59 -0400)]
tc-testing: fix arg to ip command: -s -> -n

Fixes: 31c2611b66e0 ("selftests: Introduce a new test case to tc testsuite")
Fixes: 76b903ee198d ("selftests: Introduce tc testsuite")
Signed-off-by: Brenda J. Butler <bjb@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: remove tcf_block_put_deferred()
Cong Wang [Mon, 30 Oct 2017 18:10:09 +0000 (11:10 -0700)]
net_sched: remove tcf_block_put_deferred()

In commit 7aa0045dadb6 ("net_sched: introduce a workqueue for RCU callbacks of tc filter")
I defer tcf_chain_flush() to a workqueue, this causes a use-after-free
because qdisc is already destroyed after we queue this work.

The tcf_block_put_deferred() is no longer necessary after we get RTNL
for each tc filter destroy work, no others could jump in at this point.
Same for tcf_chain_hold(), we are fully serialized now.

This also reduces one indirection therefore makes the code more
readable. Note this brings back a rcu_barrier(), however comparing
to the code prior to commit 7aa0045dadb6 we still reduced one
rcu_barrier(). For net-next, we can consider to refcnt tcf block to
avoid it.

Fixes: 7aa0045dadb6 ("net_sched: introduce a workqueue for RCU callbacks of tc filter")
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agol2tp: hold tunnel in pppol2tp_connect()
Guillaume Nault [Mon, 30 Oct 2017 16:58:58 +0000 (17:58 +0100)]
l2tp: hold tunnel in pppol2tp_connect()

Use l2tp_tunnel_get() in pppol2tp_connect() to ensure the tunnel isn't
going to disappear while processing the rest of the function.

Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoRevert "ath10k: fix napi_poll budget overflow"
Kalle Valo [Sun, 29 Oct 2017 07:45:07 +0000 (09:45 +0200)]
Revert "ath10k: fix napi_poll budget overflow"

Thorsten reported on <fa6e3ee2-91b5-a54b-afe3-87f30aac7a48@leemhuis.info> that
commit c9353bf483d3 made ath10k unstable with QCA6174 on his Dell XPS13 (9360)
with an error message:

ath10k_pci 0000:3a:00.0: failed to extract amsdu: -11

It only seemed to happen with certain APs, not all, but when it happened the
only way to get ath10k working was to switch the wifi off and on with a hotkey.

As this commit made things even worse (a warning vs breaking the whole
connection) let's revert the commit for now and while the issue is being fixed.

Link: http://lists.infradead.org/pipermail/ath10k/2017-October/010227.html
Reported-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
7 years agoath10k: rebuild crypto header in rx data frames
Vasanthakumar Thiagarajan [Fri, 27 Oct 2017 15:35:31 +0000 (18:35 +0300)]
ath10k: rebuild crypto header in rx data frames

Rx data frames notified through HTT_T2H_MSG_TYPE_RX_IND and
HTT_T2H_MSG_TYPE_RX_FRAG_IND expect PN/TSC check to be done
on host (mac80211) rather than firmware. Rebuild cipher header
in every received data frames (that are notified through those
HTT interfaces) from the rx_hdr_status tlv available in the
rx descriptor of the first msdu. Skip setting RX_FLAG_IV_STRIPPED
flag for the packets which requires mac80211 PN/TSC check support
and set appropriate RX_FLAG for stripped crypto tail. Hw QCA988X,
QCA9887, QCA99X0, QCA9984, QCA9888 and QCA4019 currently need the
rebuilding of cipher header to perform PN/TSC check for replay
attack.

Please note that removing crypto tail for CCMP-256, GCMP and GCMP-256 ciphers
in raw mode needs to be fixed. Since Rx with these ciphers in raw
mode does not work in the current form even without this patch and
removing crypto tail for these chipers needs clean up, raw mode related
issues in CCMP-256, GCMP and GCMP-256 can be addressed in follow up
patches.

Tested-by: Manikanta Pubbisetty <mpubbise@qti.qualcomm.com>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
7 years agoLinux 4.14-rc7
Linus Torvalds [Sun, 29 Oct 2017 20:58:38 +0000 (13:58 -0700)]
Linux 4.14-rc7

7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Sun, 29 Oct 2017 15:11:49 +0000 (08:11 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix route leak in xfrm_bundle_create().

 2) In mac80211, validate user rate mask before configuring it. From
    Johannes Berg.

 3) Properly enforce memory limits in fair queueing code, from Toke
    Hoiland-Jorgensen.

 4) Fix lockdep splat in inet_csk_route_req(), from Eric Dumazet.

 5) Fix TSO header allocation and management in mvpp2 driver, from Yan
    Markman.

 6) Don't take socket lock in BH handler in strparser code, from Tom
    Herbert.

 7) Don't show sockets from other namespaces in AF_UNIX code, from
    Andrei Vagin.

 8) Fix double free in error path of tap_open(), from Girish Moodalbail.

 9) Fix TX map failure path in igb and ixgbe, from Jean-Philippe Brucker
    and Alexander Duyck.

10) Fix DCB mode programming in stmmac driver, from Jose Abreu.

11) Fix err_count handling in various tunnels (ipip, ip6_gre). From Xin
    Long.

12) Properly align SKB head before building SKB in tuntap, from Jason
    Wang.

13) Avoid matching qdiscs with a zero handle during lookups, from Cong
    Wang.

14) Fix various endianness bugs in sctp, from Xin Long.

15) Fix tc filter callback races and add selftests which trigger the
    problem, from Cong Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (73 commits)
  selftests: Introduce a new test case to tc testsuite
  selftests: Introduce a new script to generate tc batch file
  net_sched: fix call_rcu() race on act_sample module removal
  net_sched: add rtnl assertion to tcf_exts_destroy()
  net_sched: use tcf_queue_work() in tcindex filter
  net_sched: use tcf_queue_work() in rsvp filter
  net_sched: use tcf_queue_work() in route filter
  net_sched: use tcf_queue_work() in u32 filter
  net_sched: use tcf_queue_work() in matchall filter
  net_sched: use tcf_queue_work() in fw filter
  net_sched: use tcf_queue_work() in flower filter
  net_sched: use tcf_queue_work() in flow filter
  net_sched: use tcf_queue_work() in cgroup filter
  net_sched: use tcf_queue_work() in bpf filter
  net_sched: use tcf_queue_work() in basic filter
  net_sched: introduce a workqueue for RCU callbacks of tc filter
  sctp: fix some type cast warnings introduced since very beginning
  sctp: fix a type cast warnings that causes a_rwnd gets the wrong value
  sctp: fix some type cast warnings introduced by transport rhashtable
  sctp: fix some type cast warnings introduced by stream reconf
  ...

7 years agoMerge branch 'net_sched-fix-races-with-RCU-callbacks'
David S. Miller [Sun, 29 Oct 2017 13:49:32 +0000 (22:49 +0900)]
Merge branch 'net_sched-fix-races-with-RCU-callbacks'

Cong Wang says:

====================
net_sched: fix races with RCU callbacks

Recently, the RCU callbacks used in TC filters and TC actions keep
drawing my attention, they introduce at least 4 race condition bugs:

1. A simple one fixed by Daniel:

commit c78e1746d3ad7d548bdf3fe491898cc453911a49
Author: Daniel Borkmann <daniel@iogearbox.net>
Date:   Wed May 20 17:13:33 2015 +0200

    net: sched: fix call_rcu() race on classifier module unloads

2. A very nasty one fixed by me:

commit 1697c4bb5245649a23f06a144cc38c06715e1b65
Author: Cong Wang <xiyou.wangcong@gmail.com>
Date:   Mon Sep 11 16:33:32 2017 -0700

    net_sched: carefully handle tcf_block_put()

3. Two more bugs found by Chris:
https://patchwork.ozlabs.org/patch/826696/
https://patchwork.ozlabs.org/patch/826695/

Usually RCU callbacks are simple, however for TC filters and actions,
they are complex because at least TC actions could be destroyed
together with the TC filter in one callback. And RCU callbacks are
invoked in BH context, without locking they are parallel too. All of
these contribute to the cause of these nasty bugs.

Alternatively, we could also:

a) Introduce a spinlock to serialize these RCU callbacks. But as I
said in commit 1697c4bb5245 ("net_sched: carefully handle
tcf_block_put()"), it is very hard to do because of tcf_chain_dump().
Potentially we need to do a lot of work to make it possible (if not
impossible).

b) Just get rid of these RCU callbacks, because they are not
necessary at all, callers of these call_rcu() are all on slow paths
and holding RTNL lock, so blocking is allowed in their contexts.
However, David and Eric dislike adding synchronize_rcu() here.

As suggested by Paul, we could defer the work to a workqueue and
gain the permission of holding RTNL again without any performance
impact, however, in tcf_block_put() we could have a deadlock when
flushing workqueue while hodling RTNL lock, the trick here is to
defer the work itself in workqueue and make it queued after all
other works so that we keep the same ordering to avoid any
use-after-free. Please see the first patch for details.

Patch 1 introduces the infrastructure, patch 2~12 move each
tc filter to the new tc filter workqueue, patch 13 adds
an assertion to catch potential bugs like this, patch 14
closes another rcu callback race, patch 15 and patch 16 add
new test cases.
====================

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoselftests: Introduce a new test case to tc testsuite
Chris Mi [Fri, 27 Oct 2017 01:24:43 +0000 (18:24 -0700)]
selftests: Introduce a new test case to tc testsuite

In this patchset, we fixed a tc bug. This patch adds the test case
that reproduces the bug. To run this test case, user should specify
an existing NIC device:
  # sudo ./tdc.py -d enp4s0f0

This test case belongs to category "flower". If user doesn't specify
a NIC device, the test cases belong to "flower" will not be run.

In this test case, we create 1M filters and all filters share the same
action. When destroying all filters, kernel should not panic. It takes
about 18s to run it.

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Lucas Bates <lucasb@mojatatu.com>
Signed-off-by: Chris Mi <chrism@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoselftests: Introduce a new script to generate tc batch file
Chris Mi [Fri, 27 Oct 2017 01:24:42 +0000 (18:24 -0700)]
selftests: Introduce a new script to generate tc batch file

  # ./tdc_batch.py -h
  usage: tdc_batch.py [-h] [-n NUMBER] [-o] [-s] [-p] device file

  TC batch file generator

  positional arguments:
    device                device name
    file                  batch file name

  optional arguments:
    -h, --help            show this help message and exit
    -n NUMBER, --number NUMBER
                          how many lines in batch file
    -o, --skip_sw         skip_sw (offload), by default skip_hw
    -s, --share_action    all filters share the same action
    -p, --prio            all filters have different prio

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Lucas Bates <lucasb@mojatatu.com>
Signed-off-by: Chris Mi <chrism@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: fix call_rcu() race on act_sample module removal
Cong Wang [Fri, 27 Oct 2017 01:24:41 +0000 (18:24 -0700)]
net_sched: fix call_rcu() race on act_sample module removal

Similar to commit c78e1746d3ad
("net: sched: fix call_rcu() race on classifier module unloads"),
we need to wait for flying RCU callback tcf_sample_cleanup_rcu().

Cc: Yotam Gigi <yotamg@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: add rtnl assertion to tcf_exts_destroy()
Cong Wang [Fri, 27 Oct 2017 01:24:40 +0000 (18:24 -0700)]
net_sched: add rtnl assertion to tcf_exts_destroy()

After previous patches, it is now safe to claim that
tcf_exts_destroy() is always called with RTNL lock.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in tcindex filter
Cong Wang [Fri, 27 Oct 2017 01:24:39 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in tcindex filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in rsvp filter
Cong Wang [Fri, 27 Oct 2017 01:24:38 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in rsvp filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in route filter
Cong Wang [Fri, 27 Oct 2017 01:24:37 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in route filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in u32 filter
Cong Wang [Fri, 27 Oct 2017 01:24:36 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in u32 filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in matchall filter
Cong Wang [Fri, 27 Oct 2017 01:24:35 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in matchall filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in fw filter
Cong Wang [Fri, 27 Oct 2017 01:24:34 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in fw filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in flower filter
Cong Wang [Fri, 27 Oct 2017 01:24:33 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in flower filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in flow filter
Cong Wang [Fri, 27 Oct 2017 01:24:32 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in flow filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in cgroup filter
Cong Wang [Fri, 27 Oct 2017 01:24:31 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in cgroup filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in bpf filter
Cong Wang [Fri, 27 Oct 2017 01:24:30 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in bpf filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use tcf_queue_work() in basic filter
Cong Wang [Fri, 27 Oct 2017 01:24:29 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in basic filter

Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: introduce a workqueue for RCU callbacks of tc filter
Cong Wang [Fri, 27 Oct 2017 01:24:28 +0000 (18:24 -0700)]
net_sched: introduce a workqueue for RCU callbacks of tc filter

This patch introduces a dedicated workqueue for tc filters
so that each tc filter's RCU callback could defer their
action destroy work to this workqueue. The helper
tcf_queue_work() is introduced for them to use.

Because we hold RTNL lock when calling tcf_block_put(), we
can not simply flush works inside it, therefore we have to
defer it again to this workqueue and make sure all flying RCU
callbacks have already queued their work before this one, in
other words, to ensure this is the last one to execute to
prevent any use-after-free.

On the other hand, this makes tcf_block_put() ugly and
harder to understand. Since David and Eric strongly dislike
adding synchronize_rcu(), this is probably the only
solution that could make everyone happy.

Please also see the code comments below.

Reported-by: Chris Mi <chrism@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'sctp-endianness-fixes'
David S. Miller [Sun, 29 Oct 2017 09:03:25 +0000 (18:03 +0900)]
Merge branch 'sctp-endianness-fixes'

Xin Long says:

====================
sctp: a bunch of fixes for some sparse warnings

As Eric noticed, when running 'make C=2 M=net/sctp/', a plenty of
warnings or errors checked by sparse appear. They are all problems
about Endian and type cast.

Most of them are just warnings by which no issues could be caused
while some might be bugs.

This patchset fixes them with four patches basically according to
how they are introduced.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosctp: fix some type cast warnings introduced since very beginning
Xin Long [Sat, 28 Oct 2017 11:43:57 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced since very beginning

These warnings were found by running 'make C=2 M=net/sctp/'.
They are there since very beginning.

Note after this patch, there still one warning left in
sctp_outq_flush():
  sctp_chunk_fail(chunk, SCTP_ERROR_INV_STRM)

Since it has been moved to sctp_stream_outq_migrate on net-next,
to avoid the extra job when merging net-next to net, I will post
the fix for it after the merging is done.

Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosctp: fix a type cast warnings that causes a_rwnd gets the wrong value
Xin Long [Sat, 28 Oct 2017 11:43:56 +0000 (19:43 +0800)]
sctp: fix a type cast warnings that causes a_rwnd gets the wrong value

These warnings were found by running 'make C=2 M=net/sctp/'.

Commit d4d6fb5787a6 ("sctp: Try not to change a_rwnd when faking a
SACK from SHUTDOWN.") expected to use the peers old rwnd and add
our flight size to the a_rwnd. But with the wrong Endian, it may
not work as well as expected.

So fix it by converting to the right value.

Fixes: d4d6fb5787a6 ("sctp: Try not to change a_rwnd when faking a SACK from SHUTDOWN.")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosctp: fix some type cast warnings introduced by transport rhashtable
Xin Long [Sat, 28 Oct 2017 11:43:55 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced by transport rhashtable

These warnings were found by running 'make C=2 M=net/sctp/'.

They are introduced by not aware of Endian for the port when
coding transport rhashtable patches.

Fixes: 7fda702f9315 ("sctp: use new rhlist interface on sctp transport rhashtable")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosctp: fix some type cast warnings introduced by stream reconf
Xin Long [Sat, 28 Oct 2017 11:43:54 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced by stream reconf

These warnings were found by running 'make C=2 M=net/sctp/'.

They are introduced by not aware of Endian when coding stream
reconf patches.

Since commit c0d8bab6ae51 ("sctp: add get and set sockopt for
reconf_enable") enabled stream reconf feature for users, the
Fixes tag below would use it.

Fixes: c0d8bab6ae51 ("sctp: add get and set sockopt for reconf_enable")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: avoid matching qdisc with zero handle
Cong Wang [Sat, 28 Oct 2017 05:08:56 +0000 (22:08 -0700)]
net_sched: avoid matching qdisc with zero handle

Davide found the following script triggers a NULL pointer
dereference:

ip l a name eth0 type dummy
tc q a dev eth0 parent :1 handle 1: htb

This is because for a freshly created netdevice noop_qdisc
is attached and when passing 'parent :1', kernel actually
tries to match the major handle which is 0 and noop_qdisc
has handle 0 so is matched by mistake. Commit 69012ae425d7
tries to fix a similar bug but still misses this case.

Handle 0 is not a valid one, should be just skipped. In
fact, kernel uses it as TC_H_UNSPEC.

Fixes: 69012ae425d7 ("net: sched: fix handling of singleton qdiscs with qdisc_hash")
Fixes: 59cc1f61f09c ("net: sched:convert qdisc linked list to hashtable")
Reported-by: Davide Caratti <dcaratti@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosctp: reset owner sk for data chunks on out queues when migrating a sock
Xin Long [Fri, 27 Oct 2017 18:13:29 +0000 (02:13 +0800)]
sctp: reset owner sk for data chunks on out queues when migrating a sock

Now when migrating sock to another one in sctp_sock_migrate(), it only
resets owner sk for the data in receive queues, not the chunks on out
queues.

It would cause that data chunks length on the sock is not consistent
with sk sk_wmem_alloc. When closing the sock or freeing these chunks,
the old sk would never be freed, and the new sock may crash due to
the overflow sk_wmem_alloc.

syzbot found this issue with this series:

  r0 = socket$inet_sctp()
  sendto$inet(r0)
  listen(r0)
  accept4(r0)
  close(r0)

Although listen() should have returned error when one TCP-style socket
is in connecting (I may fix this one in another patch), it could also
be reproduced by peeling off an assoc.

This issue is there since very beginning.

This patch is to reset owner sk for the chunks on out queues so that
sk sk_wmem_alloc has correct value after accept one sock or peeloff
an assoc to one sock.

Note that when resetting owner sk for chunks on outqueue, it has to
sctp_clear_owner_w/skb_orphan chunks before changing assoc->base.sk
first and then sctp_set_owner_w them after changing assoc->base.sk,
due to that sctp_wfree and it's callees are using assoc->base.sk.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'sockmap-fixes'
David S. Miller [Sun, 29 Oct 2017 02:18:49 +0000 (11:18 +0900)]
Merge branch 'sockmap-fixes'

John Fastabend says:

====================
net: sockmap fixes

Last two fixes (as far as I know) for sockmap code this round.

First, we are using the qdisc cb structure when making the data end
calculation. This is really just wrong so, store it with the other
metadata in the correct tcp_skb_cb sturct to avoid breaking things.

Next, with recent work to attach multiple programs to a cgroup a
specific enumeration of return codes was agreed upon. However,
I wrote the sk_skb program types before seeing this work and used
a different convention. Patch 2 in the series aligns the return
codes to avoid breaking with this infrastructure and also aligns
with other programming conventions to avoid being the odd duck out
forcing programs to remember SK_SKB programs are different. Pusing
to net because its a user visible change. With this SK_SKB program
return codes are the same as other cgroup program types.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: rename sk_actions to align with bpf infrastructure
John Fastabend [Fri, 27 Oct 2017 16:45:53 +0000 (09:45 -0700)]
bpf: rename sk_actions to align with bpf infrastructure

Recent additions to support multiple programs in cgroups impose
a strict requirement, "all yes is yes, any no is no". To enforce
this the infrastructure requires the 'no' return code, SK_DROP in
this case, to be 0.

To apply these rules to SK_SKB program types the sk_actions return
codes need to be adjusted.

This fix adds SK_PASS and makes 'SK_DROP = 0'. Finally, remove
SK_ABORTED to remove any chance that the API may allow aborted
program flows to be passed up the stack. This would be incorrect
behavior and allow programs to break existing policies.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: bpf_compute_data uses incorrect cb structure
John Fastabend [Fri, 27 Oct 2017 16:45:34 +0000 (09:45 -0700)]
bpf: bpf_compute_data uses incorrect cb structure

SK_SKB program types use bpf_compute_data to store the end of the
packet data. However, bpf_compute_data assumes the cb is stored in the
qdisc layer format. But, for SK_SKB this is the wrong layer of the
stack for this type.

It happens to work (sort of!) because in most cases nothing happens
to be overwritten today. This is very fragile and error prone.
Fortunately, we have another hole in tcp_skb_cb we can use so lets
put the data_end value there.

Note, SK_SKB program types do not use data_meta, they are failed by
sk_skb_is_valid_access().

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 28 Oct 2017 18:01:57 +0000 (11:01 -0700)]
Merge tag 'kbuild-fixes-v4.14-2' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - fix O= building on dash

 - remove unused dependency in Makefile

 - fix default of a choice in Kconfig

 - fix typos and documentation style

 - fix command options unrecognized by sparse

* tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: clang: fix build failures with sparse check
  kbuild doc: a bundle of fixes on makefiles.txt
  Makefile: kselftest: fix grammar typo
  kbuild: Fix optimization level choice default
  kbuild: drop unused symverfile in Makefile.modpost
  kbuild: revert $(realpath ...) to $(shell cd ... && /bin/pwd)

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sat, 28 Oct 2017 17:56:13 +0000 (10:56 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:

 - fix gtco tablet driver, tightening parsing of HID descriptors

 - add ACPI ID added to Elan driver to be able to handle touchpads found
   in Lenovo Ideapad 320/520

 - fix the Symaptics RMI4 driver to adjust handling of buttons

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: synaptics-rmi4 - limit the range of what GPIOs are buttons
  Input: gtco - fix potential out-of-bound access
  Input: elan_i2c - add ELAN0611 to the ACPI table

7 years agoMerge tag 'pci-v4.14-fixes-6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Sat, 28 Oct 2017 17:53:24 +0000 (10:53 -0700)]
Merge tag 'pci-v4.14-fixes-6' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "Move alpha PCI IRQ map/swizzle functions out of initdata to fix
  regression from PCI core IRQ mapping changes (Lorenzo Pieralisi)"

* tag 'pci-v4.14-fixes-6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  alpha/PCI: Move pci_map_irq()/pci_swizzle() out of initdata

7 years agoMerge tag 'drm-fixes-for-v4.14-rc7' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 28 Oct 2017 17:50:38 +0000 (10:50 -0700)]
Merge tag 'drm-fixes-for-v4.14-rc7' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Two amd fixes, one i915 core and a few i915 GVT fixes, things seem
  fairly quiet"

* tag 'drm-fixes-for-v4.14-rc7' of git://people.freedesktop.org/~airlied/linux:
  drm/i915/gvt: Adding ACTHD mmio read handler
  drm/i915/gvt: Extract mmio_read_from_hw() common function
  drm/i915/gvt: Refine MMIO_RING_F()
  drm/i915/gvt: properly check per_ctx bb valid state
  drm/i915/perf: fix perf enable/disable ioctls with 32bits userspace
  drm/amd/amdgpu: Remove workaround check for UVD6 on APUs
  drm/amd/powerplay: fix uninitialized variable

7 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 28 Oct 2017 17:46:20 +0000 (10:46 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Six fixes for mostly minor issues, most of which have small race
  windows for occurring"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: Suppress a kernel warning in case the prep function returns BLKPREP_DEFER
  scsi: sg: Re-fix off by one in sg_fill_request_table()
  scsi: aacraid: Fix controller initialization failure
  scsi: hpsa: Fix configured_logical_drive_count·check
  scsi: qla2xxx: Initialize Work element before requesting IRQs
  scsi: zfcp: fix erp_action use-before-initialize in REC action trace

7 years agoassoc_array: Fix a buggy node-splitting case
David Howells [Wed, 11 Oct 2017 22:32:27 +0000 (23:32 +0100)]
assoc_array: Fix a buggy node-splitting case

This fixes CVE-2017-12193.

Fix a case in the assoc_array implementation in which a new leaf is
added that needs to go into a node that happens to be full, where the
existing leaves in that node cluster together at that level to the
exclusion of new leaf.

What needs to happen is that the existing leaves get moved out to a new
node, N1, at level + 1 and the existing node needs replacing with one,
N0, that has pointers to the new leaf and to N1.

The code that tries to do this gets this wrong in two ways:

 (1) The pointer that should've pointed from N0 to N1 is set to point
     recursively to N0 instead.

 (2) The backpointer from N0 needs to be set correctly in the case N0 is
     either the root node or reached through a shortcut.

Fix this by removing this path and using the split_node path instead,
which achieves the same end, but in a more general way (thanks to Eric
Biggers for spotting the redundancy).

The problem manifests itself as:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
  IP: assoc_array_apply_edit+0x59/0xe5

Fixes: 3cb989501c26 ("Add a generic associative array implementation.")
Reported-and-tested-by: WU Fan <u3536072@connect.hku.hk>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: stable@vger.kernel.org [v3.13-rc1+]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 28 Oct 2017 15:39:35 +0000 (08:39 -0700)]
Merge tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Various SMB3 fixes for 4.14 and stable"

* tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6:
  SMB3: Validate negotiate request must always be signed
  SMB: fix validate negotiate info uninitialised memory use
  SMB: fix leak of validate negotiate info response buffer
  CIFS: Fix NULL pointer deref on SMB2_tcon() failure
  CIFS: do not send invalid input buffer on QUERY_INFO requests
  cifs: Select all required crypto modules
  CIFS: SMBD: Fix the definition for SMB2_CHANNEL_RDMA_V1_INVALIDATE
  cifs: handle large EA requests more gracefully in smb2+
  Fix encryption labels and lengths for SMB3.1.1

7 years agoMerge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...
Linus Torvalds [Sat, 28 Oct 2017 15:29:29 +0000 (08:29 -0700)]
Merge branch 'overlayfs-linus' of git://git./linux/kernel/git/mszeredi/vfs

Pull overlayfs fixes from Miklos Szeredi:
 "Fix several issues, most of them introduced in the last release"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: do not cleanup unsupported index entries
  ovl: handle ENOENT on index lookup
  ovl: fix EIO from lookup of non-indexed upper
  ovl: Return -ENOMEM if an allocation fails ovl_lookup()
  ovl: add NULL check in ovl_alloc_inode

7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...
Linus Torvalds [Sat, 28 Oct 2017 15:27:46 +0000 (08:27 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse

Pull fuse fix from Miklos Szeredi:
 "This fixes a longstanding bug, which can be triggered by interrupting
  a directory reading syscall"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix READDIRPLUS skipping an entry

7 years agotap: reference to KVA of an unloaded module causes kernel panic
Girish Moodalbail [Fri, 27 Oct 2017 07:00:16 +0000 (00:00 -0700)]
tap: reference to KVA of an unloaded module causes kernel panic

The commit 9a393b5d5988 ("tap: tap as an independent module") created a
separate tap module that implements tap functionality and exports
interfaces that will be used by macvtap and ipvtap modules to create
create respective tap devices.

However, that patch introduced a regression wherein the modules macvtap
and ipvtap can be removed (through modprobe -r) while there are
applications using the respective /dev/tapX devices. These applications
cause kernel to hold reference to /dev/tapX through 'struct cdev
macvtap_cdev' and 'struct cdev ipvtap_dev' defined in macvtap and ipvtap
modules respectively. So,  when the application is later closed the
kernel panics because we are referencing KVA that is present in the
unloaded modules.

----------8<------- Example ----------8<----------
$ sudo ip li add name mv0 link enp7s0 type macvtap
$ sudo ip li show mv0 |grep mv0| awk -e '{print $1 $2}'
  14:mv0@enp7s0:
$ cat /dev/tap14 &
$ lsmod |egrep -i 'tap|vlan'
macvtap                16384  0
macvlan                24576  1 macvtap
tap                    24576  3 macvtap
$ sudo modprobe -r macvtap
$ fg
cat /dev/tap14
^C

<...system panics...>
BUG: unable to handle kernel paging request at ffffffffa038c500
IP: cdev_put+0xf/0x30
----------8<-----------------8<----------

The fix is to set cdev.owner to the module that creates the tap device
(either macvtap or ipvtap). With this set, the operations (in
fs/char_dev.c) on char device holds and releases the module through
cdev_get() and cdev_put() and will not allow the module to unload
prematurely.

Fixes: 9a393b5d5988ea4e (tap: tap as an independent module)
Signed-off-by: Girish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotcp: refresh tp timestamp before tcp_mtu_probe()
Eric Dumazet [Fri, 27 Oct 2017 04:21:40 +0000 (21:21 -0700)]
tcp: refresh tp timestamp before tcp_mtu_probe()

In the unlikely event tcp_mtu_probe() is sending a packet, we
want tp->tcp_mstamp being as accurate as possible.

This means we need to call tcp_mstamp_refresh() a bit earlier in
tcp_write_xmit().

Fixes: 385e20706fac ("tcp: use tp->tcp_mstamp in output path")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotuntap: properly align skb->head before building skb
Jason Wang [Fri, 27 Oct 2017 03:05:44 +0000 (11:05 +0800)]
tuntap: properly align skb->head before building skb

An unaligned alloc_frag->offset caused by previous allocation will
result an unaligned skb->head. This will lead unaligned
skb_shared_info and then unaligned dataref which requires to be
aligned for accessing on some architecture. Fix this by aligning
alloc_frag->offset before the frag refilling.

Fixes: 0bbd7dad34f8 ("tun: make tun_build_skb() thread safe")
Cc: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Wei Wei <dotweiba@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Reported-by: Wei Wei <dotweiba@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'for-linus-4.14c-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Oct 2017 03:41:05 +0000 (20:41 -0700)]
Merge tag 'for-linus-4.14c-rc7-tag' of git://git./linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - a fix for the Xen gntdev device repairing an issue in case of partial
   failure of mapping multiple pages of another domain

 - a fix of a regression in the Xen balloon driver introduced in 4.13

 - a build fix for Xen on ARM which will trigger e.g. for Linux RT

 - a maintainers update for pvops (not really Xen, but carrying through
   this tree just for convenience)

* tag 'for-linus-4.14c-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  maintainers: drop Chris Wright from pvops
  arm/xen: don't inclide rwlock.h directly.
  xen: fix booting ballooned down hvm guest
  xen/gntdev: avoid out of bounds access in case of partial gntdev_mmap()

7 years agoMerge tag 'arc-4.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Linus Torvalds [Sat, 28 Oct 2017 03:38:47 +0000 (20:38 -0700)]
Merge tag 'arc-4.14-rc7' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:

 - Fixes for HSDK platform

 - module build error for !LLSC config

* tag 'arc-4.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: unbork module link errors with !CONFIG_ARC_HAS_LLSC
  ARC: [plat-hsdk] Increase SDIO CIU frequency to 50000000Hz
  ARC: [plat-hsdk] select CONFIG_RESET_HSDK from Kconfig

7 years agoFix tracing sample code warning.
Linus Torvalds [Sat, 28 Oct 2017 03:35:31 +0000 (20:35 -0700)]
Fix tracing sample code warning.

Commit 6575257c60e1 ("tracing/samples: Fix creation and deletion of
simple_thread_fn creation") introduced a new warning due to using a
boolean as a counter.

Just make it "int".

Fixes: 6575257c60e1 ("tracing/samples: Fix creation and deletion of simple_thread_fn creation")
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Sat, 28 Oct 2017 03:32:24 +0000 (20:32 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fix from Martin Schwidefsky:
 "A fix for a regression in regard to machine check handling in KVM.

  Keeping my fingers crossed that this is the last s390 fix for v4.14"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/kvm: fix detection of guest machine checks

7 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Oct 2017 00:19:39 +0000 (17:19 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - revert a /dev/mem restriction change that crashes with certain boot
     parameters

   - an AMD erratum fix for cases where the BIOS doesn't apply it

   - fix unwinder debuginfo

   - improve ORC unwinder warning printouts"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "x86/mm: Limit mmap() of /dev/mem to valid physical addresses"
  x86/unwind: Show function name+offset in ORC error messages
  x86/entry: Fix idtentry unwind hint
  x86/cpu/AMD: Apply the Erratum 688 fix when the BIOS doesn't

7 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Oct 2017 00:17:25 +0000 (17:17 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:
 "Update the <linux/swait.h> documentation to discourage their use"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/swait: Document it clearly that the swait facilities are special and shouldn't be used

7 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Oct 2017 00:15:49 +0000 (17:15 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fix from Ingo Molnar:
 "A fix for a misplaced permission check that can leave perf PT or LBR
  disabled (on Intel CPUs) permanently until the next reboot"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/bts: Fix exclusive event reference leak

7 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 28 Oct 2017 00:14:32 +0000 (17:14 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "Two fixes: an ARM fix for KASLR interaction with hibernation, plus an
  efi_test crash fix"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/libstub/arm: Don't randomize runtime regions when CONFIG_HIBERNATION=y
  efi/efi_test: Prevent an Oops in efi_runtime_query_capsulecaps()

7 years agoInput: synaptics-rmi4 - limit the range of what GPIOs are buttons
Andrew Duggan [Wed, 25 Oct 2017 16:30:16 +0000 (09:30 -0700)]
Input: synaptics-rmi4 - limit the range of what GPIOs are buttons

By convention the first 6 bits of F30 Ctrl 2 and 3 are used to signify
GPIOs which are connected to buttons. Additional GPIOs may be used as
input GPIOs to signal the touch controller of some event
(ie disable touchpad). These additional GPIOs may meet the criteria of
a button in rmi_f30_is_valid_button() but should not be considered
buttons. This patch limits the GPIOs which are mapped to buttons to just
the first 6.

Signed-off-by: Andrew Duggan <aduggan@synaptics.com>
Reported-by: Daniel Martin <consume.noise@gmail.com>
Tested-by: Daniel Martin <consume.noise@gmail.com>
Acked-By: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
7 years agoInput: gtco - fix potential out-of-bound access
Dmitry Torokhov [Mon, 23 Oct 2017 23:46:00 +0000 (16:46 -0700)]
Input: gtco - fix potential out-of-bound access

parse_hid_report_descriptor() has a while (i < length) loop, which
only guarantees that there's at least 1 byte in the buffer, but the
loop body can read multiple bytes which causes out-of-bounds access.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
7 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net...
David S. Miller [Fri, 27 Oct 2017 15:05:34 +0000 (00:05 +0900)]
Merge branch '40GbE' of git://git./linux/kernel/git/jkirsher/net-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2017-10-26

This series contains fixes to e1000, igb, ixgbe and i40e.

Vincenzo Maffione fixes a potential race condition which would result in
the interface being up but transmits are disabled in the hardware.

Colin Ian King fixes a possible NULL pointer dereference in e1000, which
was found by Coverity.

Jean-Philippe Brucker fixes a possible kernel panic when a driver cannot
map a transmit buffer, which is caused by an erroneous test.

Alex provides a fix for ixgbe, which is a partial revert of the commit
ffed21bcee7a ("ixgbe: Don't bother clearing buffer memory for descriptor rings")
because the previous commit messed up the exception handling path by
adding the count back in when we did not need to.  Also fixed a typo,
where the transmit ITR setting was being used to determine if we were
using adaptive receive interrupt moderation or not.  Lastly, fixed a
memory leak by including programming descriptors in the cleaned count.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoip6_gre: update dst pmtu if dev mtu has been updated by toobig in __gre6_xmit
Xin Long [Thu, 26 Oct 2017 11:27:17 +0000 (19:27 +0800)]
ip6_gre: update dst pmtu if dev mtu has been updated by toobig in __gre6_xmit

When receiving a Toobig icmpv6 packet, ip6gre_err would just set
tunnel dev's mtu, that's not enough. For skb_dst(skb)'s pmtu may
still be using the old value, it has no chance to be updated with
tunnel dev's mtu.

Jianlin found this issue by reducing route's mtu while running
netperf, the performance went to 0.

ip6ip6 and ip4ip6 tunnel can work well with this, as they lookup
the upper dst and update_pmtu it's pmtu or icmpv6_send a Toobig
to upper socket after setting tunnel dev's mtu.

We couldn't do that for ip6_gre, as gre's inner packet could be
any protocol, it's difficult to handle them (like lookup upper
dst) in a good way.

So this patch is to fix it by updating skb_dst(skb)'s pmtu when
dev->mtu < skb_dst(skb)'s pmtu in tx path. It's safe to do this
update there, as usually dev->mtu <= skb_dst(skb)'s pmtu and no
performance regression can be caused by this.

Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoip6_gre: only increase err_count for some certain type icmpv6 in ip6gre_err
Xin Long [Thu, 26 Oct 2017 11:23:27 +0000 (19:23 +0800)]
ip6_gre: only increase err_count for some certain type icmpv6 in ip6gre_err

The similar fix in patch 'ipip: only increase err_count for some
certain type icmp in ipip_err' is needed for ip6gre_err.

In Jianlin's case, udp netperf broke even when receiving a TooBig
icmpv6 packet.

Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipip: only increase err_count for some certain type icmp in ipip_err
Xin Long [Thu, 26 Oct 2017 11:19:56 +0000 (19:19 +0800)]
ipip: only increase err_count for some certain type icmp in ipip_err

t->err_count is used to count the link failure on tunnel and an err
will be reported to user socket in tx path if t->err_count is not 0.
udp socket could even return EHOSTUNREACH to users.

Since commit fd58156e456d ("IPIP: Use ip-tunneling code.") removed
the 'switch check' for icmp type in ipip_err(), err_count would be
increased by the icmp packet with ICMP_EXC_FRAGTIME code. an link
failure would be reported out due to this.

In Jianlin's case, when receiving ICMP_EXC_FRAGTIME a icmp packet,
udp netperf failed with the err:
  send_data: data send error: No route to host (errno 113)

We expect this error reported from tunnel to socket when receiving
some certain type icmp, but not ICMP_EXC_FRAGTIME, ICMP_SR_FAILED
or ICMP_PARAMETERPROB ones.

This patch is to bring 'switch check' for icmp type back to ipip_err
so that it only reports link failure for the right type icmp, just as
in ipgre_err() and ipip6_err().

Fixes: fd58156e456d ("IPIP: Use ip-tunneling code.")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: stmmac: First Queue must always be in DCB mode
Jose Abreu [Thu, 26 Oct 2017 09:07:12 +0000 (10:07 +0100)]
net: stmmac: First Queue must always be in DCB mode

According to DWMAC databook the first queue operating mode
must always be in DCB.

As MTL_QUEUE_DCB = 1, we need to always set the first queue
operating mode to DCB otherwise driver will think that queue
is in AVB mode (because MTL_QUEUE_AVB = 0).

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: stmmac: dwc-qos-eth: Fix typo in DT bindings parsing
Jose Abreu [Thu, 26 Oct 2017 08:51:33 +0000 (09:51 +0100)]
net: stmmac: dwc-qos-eth: Fix typo in DT bindings parsing

According to DT bindings documentation we are expecting a
property called "snps,read-requests" but we are parsing
instead a property called "read,read-requests".

This is clearly a typo. Fix it.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agowcn36xx: Remove unnecessary rcu_read_unlock in wcn36xx_bss_info_changed
Jia-Ju Bai [Fri, 27 Oct 2017 08:12:30 +0000 (11:12 +0300)]
wcn36xx: Remove unnecessary rcu_read_unlock in wcn36xx_bss_info_changed

No rcu_read_lock is called, but rcu_read_unlock is still called.
Thus rcu_read_unlock should be removed.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
7 years agoMerge tag 'mlx5-fixes-2017-10-26' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Fri, 27 Oct 2017 13:23:41 +0000 (22:23 +0900)]
Merge tag 'mlx5-fixes-2017-10-26' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
Mellanox, mlx5 fixes 2017-10-26

The series includes some misc fixes for mlx5 core and etherent driver.
Please pull and let me know if there's any problem.

For -Stable:
net/mlx5e: Properly deal with encap flows add/del under neigh update (kernels >= 4.12)
net/mlx5: Fix health work queue spin lock to IRQ safe  (kernels >= 4.13)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoRevert "x86/mm: Limit mmap() of /dev/mem to valid physical addresses"
Ingo Molnar [Fri, 27 Oct 2017 08:03:13 +0000 (10:03 +0200)]
Revert "x86/mm: Limit mmap() of /dev/mem to valid physical addresses"

This reverts commit ce56a86e2ade45d052b3228cdfebe913a1ae7381.

There's unanticipated interaction with some boot parameters like 'mem=',
which now cause the new checks via valid_mmap_phys_addr_range() to be too
restrictive, crashing a Qemu bootup in fact, as reported by Fengguang Wu.

So while the motivation of the change is still entirely valid, we
need a few more rounds of testing to get it right - it's way too late
after -rc6, so revert it for now.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Craig Bergstrom <craigb@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: dsafonov@virtuozzo.com
Cc: kirill.shutemov@linux.intel.com
Cc: mhocko@suse.com
Cc: oleg@redhat.com
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
7 years agomaintainers: drop Chris Wright from pvops
Juergen Gross [Thu, 26 Oct 2017 10:31:54 +0000 (12:31 +0200)]
maintainers: drop Chris Wright from pvops

Mails to chrisw@sous-sol.org are not deliverable since several months.
Drop him as PARAVIRT_OPS maintainer.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Chris Wright <chrisw@redhat.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
7 years agoMerge tag 'mac80211-for-davem-2017-10-25' of git://git.kernel.org/pub/scm/linux/kerne...
David S. Miller [Fri, 27 Oct 2017 04:50:06 +0000 (13:50 +0900)]
Merge tag 'mac80211-for-davem-2017-10-25' of git://git./linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
pull-request: mac80211 2017-10-25

Here are:
 * follow-up fixes for the WoWLAN security issue, to fix a
   partial TKIP key material problem and to use crypto_memneq()
 * a change for better enforcement of FQ's memory limit
 * a disconnect/connect handling fix, and
 * a user rate mask validation fix
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge tag 'drm-intel-fixes-2017-10-26' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 27 Oct 2017 01:43:17 +0000 (11:43 +1000)]
Merge tag 'drm-intel-fixes-2017-10-26' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

One fix for stable:

- fix perf enable/disable ioctls for 32bits (Lionel)

Plus GVT fixes:

- Fix per_ctx_bb check (Zhenyu)
- Fix GPU hang of Linux guest (Xion)
- Refine MMIO_RING_F to check for presence of VCS2 ring (Zhi)

* tag 'drm-intel-fixes-2017-10-26' of git://anongit.freedesktop.org/drm/drm-intel:
  drm/i915/gvt: Adding ACTHD mmio read handler
  drm/i915/gvt: Extract mmio_read_from_hw() common function
  drm/i915/gvt: Refine MMIO_RING_F()
  drm/i915/gvt: properly check per_ctx bb valid state

7 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Thu, 26 Oct 2017 21:04:14 +0000 (23:04 +0200)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fix from Doug Ledford:
 "Fix an oops issue in the new RDMA netlink code"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  RDMA/netlink: OOPs in rdma_nl_rcv_msg() from misinterpreted flag

7 years agoarm/xen: don't inclide rwlock.h directly.
Sebastian Andrzej Siewior [Thu, 5 Oct 2017 12:56:53 +0000 (14:56 +0200)]
arm/xen: don't inclide rwlock.h directly.

rwlock.h should not be included directly. Instead linux/splinlock.h
should be included. One thing it does is to break the RT build.

Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
7 years agodrm/i915/gvt: Adding ACTHD mmio read handler
Xiong Zhang [Fri, 13 Oct 2017 22:34:47 +0000 (06:34 +0800)]
drm/i915/gvt: Adding ACTHD mmio read handler

When a workload is too heavy to finish it in gpu hang check timer
intervals(1.5), gpu hang check function will check ACTHD register
value to decide whether gpu is real dead or not. On real hw,
ACTHD is updated by HW when workload is running, then host kernel
won't think it is gpu hang. while guest kernel always read a constant
ACTHD value as GVT doesn't supply ACTHD emulate handler, then
guest kernel detects a fake gpu hang.

To remove such guest fake gpu hang, this patch supply ACTHD
mmio read handler which read real HW ACTHD register directly.

Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b4c9a097-3e62-124e-6856-b0c37764df7b@intel.com
7 years agodrm/i915/gvt: Extract mmio_read_from_hw() common function
Xiong Zhang [Fri, 13 Oct 2017 22:34:46 +0000 (06:34 +0800)]
drm/i915/gvt: Extract mmio_read_from_hw() common function

The mmio read handler for ring timestmap / instdone register are same
as reading hw value directly.

Extract it as common function to reduce code duplications.

Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
7 years agodrm/i915/gvt: Refine MMIO_RING_F()
Zhi Wang [Sat, 30 Sep 2017 09:32:16 +0000 (17:32 +0800)]
drm/i915/gvt: Refine MMIO_RING_F()

Inspect if the host has VCS2 ring by host i915 macro in MMIO_RING_F().
Also this helps on reducing some LOCs.

Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
7 years agodrm/i915/gvt: properly check per_ctx bb valid state
Zhenyu Wang [Thu, 19 Oct 2017 05:54:06 +0000 (13:54 +0800)]
drm/i915/gvt: properly check per_ctx bb valid state

Need to check valid state for per_ctx bb and bypass batch buffer
combine for scan if necessary. Otherwise adding invalid MI batch
buffer start cmd for per_ctx bb will cause scan failure, which is
taken as -EFAULT now so vGPU would be put in failsafe. This trys
to fix that by checking per_ctx bb valid state. Also remove old
invalid WARNING that indirect ctx bb shouldn't depend on valid
per_ctx bb.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
7 years agoRevert "apparmor: add base infastructure for socket mediation"
Linus Torvalds [Thu, 26 Oct 2017 17:35:35 +0000 (19:35 +0200)]
Revert "apparmor: add base infastructure for socket mediation"

This reverts commit 651e28c5537abb39076d3949fb7618536f1d242e.

This caused a regression:
 "The specific problem is that dnsmasq refuses to start on openSUSE Leap
  42.2.  The specific cause is that and attempt to open a PF_LOCAL socket
  gets EACCES.  This means that networking doesn't function on a system
  with a 4.14-rc2 system."

Sadly, the developers involved seemed to be in denial for several weeks
about this, delaying the revert.  This has not been a good release for
the security subsystem, and this area needs to change development
practices.

Reported-and-bisected-by: James Bottomley <James.Bottomley@hansenpartnership.com>
Tracked-by: Thorsten Leemhuis <regressions@leemhuis.info>
Cc: John Johansen <john.johansen@canonical.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Seth Arnold <seth.arnold@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoSMB3: Validate negotiate request must always be signed
Steve French [Wed, 25 Oct 2017 20:58:31 +0000 (15:58 -0500)]
SMB3: Validate negotiate request must always be signed

According to MS-SMB2 3.2.55 validate_negotiate request must
always be signed. Some Windows can fail the request if you send it unsigned

See kernel bugzilla bug 197311

CC: Stable <stable@vger.kernel.org>
Acked-by: Ronnie Sahlberg <lsahlber.redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
7 years agoMerge tag 'pm-4.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Thu, 26 Oct 2017 17:10:39 +0000 (19:10 +0200)]
Merge tag 'pm-4.14-rc7' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "This fixes a device power management quality of service (PM QoS)
  framework implementation issue causing 'no restriction' requests for
  device resume latency, including 'no restriction' set by user space,
  to effectively override requests with specific device resume latency
  requirements.

  It is late in the cycle, but the bug in question is in the 'user space
  can trigger unexpected behavior' category and the fix is
  stable-candidate, so here it goes"

* tag 'pm-4.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / QoS: Fix device resume latency PM QoS

7 years agoalpha/PCI: Move pci_map_irq()/pci_swizzle() out of initdata
Lorenzo Pieralisi [Thu, 26 Oct 2017 14:54:15 +0000 (15:54 +0100)]
alpha/PCI: Move pci_map_irq()/pci_swizzle() out of initdata

The introduction of {map/swizzle}_irq() hooks in the struct pci_host_bridge
allowed to replace the pci_fixup_irqs() PCI IRQ allocation in alpha arch
PCI code with per-bridge map/swizzle functions with commit 0e4c2eeb758a
("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping
hooks").

As a side effect of converting PCI IRQ allocation to the struct
pci_host_bridge {map/swizzle}_irq() hooks mechanism, the actual PCI IRQ
allocation function (ie pci_assign_irq()) is carried out per-device in
pci_device_probe() that is called when a PCI device driver is about to be
probed.

This means that, for drivers compiled as loadable modules, the actual PCI
device IRQ allocation can now happen after the system has booted so the
struct pci_host_bridge {map/swizzle}_irq() hooks pci_assign_irq() relies on
must stay valid after the system has booted so that PCI core can carry out
PCI IRQ allocation correctly.

Most of the alpha board structures pci_map_irq() and pci_swizzle() hooks
(that are used to initialize their struct pci_host_bridge equivalent
through the alpha_mv global variable - that represents the struct
alpha_machine_vector of the running kernel) are marked as
__init/__initdata; this causes freed memory dereferences when PCI IRQ
allocation is carried out after the kernel has booted (ie when loading PCI
drivers as loadable module) because when the kernel tries to bind the PCI
device to its (module) driver, the function pci_assign_irq() is called,
that in turn retrieves the struct pci_host_bridge {map/swizzle}_irq() hooks
to carry out PCI IRQ allocation; if those hooks are marked as __init
code/__initdata they point at freed/invalid memory.

Fix the issue by removing the __init/__initdata markers from all subarch
struct alpha_machine_vector.pci_map_irq()/pci_swizzle() functions (and
data).

Fixes: 0e4c2eeb758a ("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks")
Link: http://lkml.kernel.org/r/alpine.LRH.2.21.1710251043170.7098@math.ut.ee
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Meelis Roos <mroos@linux.ee>
Cc: Matt Turner <mattst88@gmail.com>
7 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Thu, 26 Oct 2017 15:08:48 +0000 (17:08 +0200)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A few select fixes that should go into this series. Mainly for NVMe,
  but also a single stable fix for nbd from Josef"

* 'for-linus' of git://git.kernel.dk/linux-block:
  nbd: handle interrupted sendmsg with a sndtimeo set
  nvme-rdma: Fix error status return in tagset allocation failure
  nvme-rdma: Fix possible double free in reconnect flow
  nvmet: synchronize sqhd update
  nvme-fc: retry initial controller connections 3 times
  nvme-fc: fix iowait hang

7 years agoMerge tag 'spi-fix-v4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/brooni...
Linus Torvalds [Thu, 26 Oct 2017 15:06:35 +0000 (17:06 +0200)]
Merge tag 'spi-fix-v4.14-rc5' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "There are a bunch of device specific fixes (more than I'd like, I've
  been lax sending these) plus one important core fix for the conversion
  to use an IDR for bus number allocation which avoids issues with
  collisions when some but not all of the buses in the system have a
  fixed bus number specified.

  The Armada changes are rather large, specificially "spi: armada-3700:
  Fix padding when sending not 4-byte aligned data", but it's a storage
  corruption issue and there's things like indentation changes which
  make it look bigger than it really is. It's been cooking in -next for
  quite a while now and is part of the reason for the delay"

* tag 'spi-fix-v4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: fix IDR collision on systems with both fixed and dynamic SPI bus numbers
  spi: bcm-qspi: Fix use after free in bcm_qspi_probe() in error path
  spi: a3700: Return correct value on timeout detection
  spi: uapi: spidev: add missing ioctl header
  spi: stm32: Fix logical error in stm32_spi_prepare_mbr()
  spi: armada-3700: Fix padding when sending not 4-byte aligned data
  spi: armada-3700: Fix failing commands with quad-SPI

7 years agoMerge tag 'ceph-for-4.14-rc7' of git://github.com/ceph/ceph-client
Linus Torvalds [Thu, 26 Oct 2017 15:04:20 +0000 (17:04 +0200)]
Merge tag 'ceph-for-4.14-rc7' of git://github.com/ceph/ceph-client

Pull ceph fix from Ilya Dryomov:
 "A small lock imbalance fix, marked for stable"

* tag 'ceph-for-4.14-rc7' of git://github.com/ceph/ceph-client:
  ceph: unlock dangling spinlock in try_flush_caps()

7 years agoi40e: Add programming descriptors to cleaned_count
Alexander Duyck [Sun, 22 Oct 2017 01:12:29 +0000 (18:12 -0700)]
i40e: Add programming descriptors to cleaned_count

This patch updates the i40e driver to include programming descriptors in
the cleaned_count. Without this change it becomes possible for us to leak
memory as we don't trigger a large enough allocation when the time comes to
allocate new buffers and we end up overwriting a number of rx_buffers equal
to the number of programming descriptors we encountered.

Fixes: 0e626ff7ccbf ("i40e: Fix support for flow director programming status")
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Anders K. Pedersen <akp@cohaesio.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
7 years agoi40e: Fix incorrect use of tx_itr_setting when checking for Rx ITR setup
Alexander Duyck [Fri, 20 Oct 2017 20:59:20 +0000 (13:59 -0700)]
i40e: Fix incorrect use of tx_itr_setting when checking for Rx ITR setup

It looks like there was either a copy/paste error or just a typo that
resulted in the Tx ITR setting being used to determine if we were using
adaptive Rx interrupt moderation or not.

This patch fixes the typo.

Fixes: 65e87c0398f5 ("i40evf: support queue-specific settings for interrupt moderation")
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
7 years agoixgbe: Fix Tx map failure path
Alexander Duyck [Thu, 19 Oct 2017 21:07:13 +0000 (17:07 -0400)]
ixgbe: Fix Tx map failure path

This patch is a partial revert of "ixgbe: Don't bother clearing buffer
memory for descriptor rings". Specifically I messed up the exception
handling path a bit and this resulted in us incorrectly adding the count
back in when we didn't need to.

In order to make this simpler I am reverting most of the exception handling
path change and instead just replacing the bit that was handled by the
unmap_and_free call.

Fixes: ffed21bcee7a ("ixgbe: Don't bother clearing buffer memory for descriptor rings")
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
7 years agoigb: Fix TX map failure path
Jean-Philippe Brucker [Thu, 19 Oct 2017 19:07:36 +0000 (20:07 +0100)]
igb: Fix TX map failure path

When the driver cannot map a TX buffer, instead of rolling back
gracefully and retrying later, we currently get a panic:

[  159.885994] igb 0000:00:00.0: TX DMA map failed
[  159.886588] Unable to handle kernel paging request at virtual address ffff00000a08c7a8
               ...
[  159.897031] PC is at igb_xmit_frame_ring+0x9c8/0xcb8

Fix the erroneous test that leads to this situation.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>