openwrt/staging/blogic.git
7 years agoMerge branch 'rds-bug-fixes'
David S. Miller [Wed, 27 Dec 2017 18:37:28 +0000 (13:37 -0500)]
Merge branch 'rds-bug-fixes'

Sowmini Varadhan says:

====================
rds bug fixes

Ran into pre-existing bugs when working on the fix for
   https://www.spinics.net/lists/netdev/msg472849.html

The bugs fixed in this patchset are unrelated to the syzbot
failure (which I'm still testing and trying to reproduce) but
meanwhile, let's get these fixes out of the way.

V2: target net-next (rds:tcp patches have a dependancy on
changes that are in net-next, but not yet in net)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agords: tcp: cleanup if kmem_cache_alloc fails in rds_tcp_conn_alloc()
Sowmini Varadhan [Fri, 22 Dec 2017 17:39:01 +0000 (09:39 -0800)]
rds: tcp: cleanup if kmem_cache_alloc fails in rds_tcp_conn_alloc()

If kmem_cache_alloc() fails in the middle of the for() loop,
cleanup anything that might have been allocated so far.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agords: tcp: initialize t_tcp_detached to false
Sowmini Varadhan [Fri, 22 Dec 2017 17:39:00 +0000 (09:39 -0800)]
rds: tcp: initialize t_tcp_detached to false

Commit f10b4cff98c6 ("rds: tcp: atomically purge entries from
rds_tcp_conn_list during netns delete") adds the field t_tcp_detached,
but this needs to be initialized explicitly to false.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agords; Reset rs->rs_bound_addr in rds_add_bound() failure path
Sowmini Varadhan [Fri, 22 Dec 2017 17:38:59 +0000 (09:38 -0800)]
rds; Reset rs->rs_bound_addr in rds_add_bound() failure path

If the rds_sock is not added to the bind_hash_table, we must
reset rs_bound_addr so that rds_remove_bound will not trip on
this rds_sock.

rds_add_bound() does a rds_sock_put() in this failure path, so
failing to reset rs_bound_addr will result in a socket refcount
bug, and will trigger a WARN_ON with the stack shown below when
the application subsequently tries to close the PF_RDS socket.

     WARNING: CPU: 20 PID: 19499 at net/rds/af_rds.c:496 \
rds_sock_destruct+0x15/0x30 [rds]
       :
     __sk_destruct+0x21/0x190
     rds_remove_bound.part.13+0xb6/0x140 [rds]
     rds_release+0x71/0x120 [rds]
     sock_release+0x1a/0x70
     sock_close+0xe/0x20
     __fput+0xd5/0x210
     task_work_run+0x82/0xa0
     do_exit+0x2ce/0xb30
     ? syscall_trace_enter+0x1cc/0x2b0
     do_group_exit+0x39/0xa0
     SyS_exit_group+0x10/0x10
     do_syscall_64+0x61/0x1a0

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: api: fix tcf_block_get
Sudip Mukherjee [Fri, 22 Dec 2017 15:52:05 +0000 (15:52 +0000)]
net: sch: api: fix tcf_block_get

The build of mips bcm47xx_defconfig is failing with the error:
net/sched/sch_fq_codel.c: In function 'fq_codel_init':
net/sched/sch_fq_codel.c:487:8: error:
too many arguments to function 'tcf_block_get'

While adding the extack support, the commit missed adding it in the
headers when CONFIG_NET_CLS is not defined.

Fixes: 8d1a77f974ca ("net: sch: api: add extack support in tcf_block_get")
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'l2tp-next'
David S. Miller [Wed, 27 Dec 2017 17:11:52 +0000 (12:11 -0500)]
Merge branch 'l2tp-next'

Lorenzo Bianconi says:

====================
l2tp: fix offset/peer_offset conf parameters

This patchset add peer_offset configuration parameter in order to
specify two different values for payload offset on tx/rx side.
Moreover fix missing print session offset info
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agol2tp: add peer_offset parameter
Lorenzo Bianconi [Fri, 22 Dec 2017 14:10:18 +0000 (15:10 +0100)]
l2tp: add peer_offset parameter

Introduce peer_offset parameter in order to add the capability
to specify two different values for payload offset on tx/rx side.
If just offset is provided by userspace use it for rx side as well
in order to maintain compatibility with older l2tp versions

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agol2tp: fix missing print session offset info
Hangbin Liu [Fri, 22 Dec 2017 14:10:17 +0000 (15:10 +0100)]
l2tp: fix missing print session offset info

Report offset parameter in L2TP_CMD_SESSION_GET command if
it has been configured by userspace

Fixes: 309795f4bec ("l2tp: Add netlink control API for L2TP")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.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, 27 Dec 2017 16:15:14 +0000 (11:15 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/klassert/ipsec-next

Steffen Klassert says:

====================
pull request (net-next): ipsec-next 2017-12-22

1) Separate ESP handling from segmentation for GRO packets.
   This unifies the IPsec GSO and non GSO codepath.

2) Add asynchronous callbacks for xfrm on layer 2. This
   adds the necessary infrastructure to core networking.

3) Allow to use the layer2 IPsec GSO codepath for software
   crypto, all infrastructure is there now.

4) Also allow IPsec GSO with software crypto for local sockets.

5) Don't require synchronous crypto fallback on IPsec offloading,
   it is not needed anymore.

6) Check for xdo_dev_state_free and only call it if implemented.
   From Shannon Nelson.

7) Check for the required add and delete functions when a driver
   registers xdo_dev_ops. From Shannon Nelson.

8) Define xfrmdev_ops only with offload config.
   From Shannon Nelson.

9) Update the xfrm stats documentation.
   From Shannon Nelson.

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

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agophylib: rename reset-(post-)delay-us to reset-(de)assert-us
Richard Leitner [Fri, 22 Dec 2017 10:08:09 +0000 (11:08 +0100)]
phylib: rename reset-(post-)delay-us to reset-(de)assert-us

As suggested by Rob Herring [1] rename the previously introduced
reset-{,post-}delay-us bindings to the clearer reset-{,de}assert-us

[1] https://patchwork.kernel.org/patch/10104905/

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'hns3-next'
David S. Miller [Wed, 27 Dec 2017 15:42:41 +0000 (10:42 -0500)]
Merge branch 'hns3-next'

Peng Li says:

====================
add some features and fix some bugs for HNS3 driver

This patchset adds some new feature support and fixes some bugs:
[Patch 1/17 - 5/17] add the support to modify/query the tqp number
through ethtool -L/l command, and also fix some related bugs for
change tqp number.
[Patch 6/17 - 9-17] add support vlan tag offload on tx&&rx direction
for pf, and fix some related bugs.
[patch 10/17 - 11/17] fix bugs for auto negotiation.
[patch 12/17] adds support for ethtool command set_pauseparam.
[patch 13/17 - 14/17] add support to update flow control settings after
autoneg.
[patch 15/17 - 17/17] fix some other bugs in net-next.

---
Change Log:
V4 -> V5:
1. change the name spelling of Peng Li.

V3 -> V4:
1. change the name spelling of Mingguang Qu and Jian Shen.

V2 -> V3:
1. order local variables requested by David Miller.
2. use "int" for index iteration loops requested by David Miller.

V1 -> V2:
1. fix the comments from Sergei Shtylyov.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: change TM sched mode to TC-based mode when SRIOV enabled
Peng Li [Fri, 22 Dec 2017 04:21:56 +0000 (12:21 +0800)]
net: hns3: change TM sched mode to TC-based mode when SRIOV enabled

TC-based sched mode supports SRIOV enabled and SRIOV disabled. This
patch change the TM sched mode to TC-based mode in initialization
process.

Fixes: cc9bb43ab394 ("net: hns3: Add tc-based TM support for sriov enabled port")
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Increase the default depth of bucket for TM shaper
Peng Li [Fri, 22 Dec 2017 04:21:55 +0000 (12:21 +0800)]
net: hns3: Increase the default depth of bucket for TM shaper

Burstiness of a flow is determined by the depth of a bucket, When the
upper rate of shaper is large, the current depth of a bucket is not
enough.

The default upper rate of shaper is 100G, so increase the depth of
a bucket according to UM.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add support for querying advertised pause frame by ethtool ethx
Peng Li [Fri, 22 Dec 2017 04:21:54 +0000 (12:21 +0800)]
net: hns3: add support for querying advertised pause frame by ethtool ethx

This patch adds support for querying advertised pause frame by using
ethtool command(ethtool ethx).

Fixes: 496d03e960ae ("net: hns3: Add Ethtool support to HNS3 driver")
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add Asym Pause support to phy default features
Fuyun Liang [Fri, 22 Dec 2017 04:21:53 +0000 (12:21 +0800)]
net: hns3: add Asym Pause support to phy default features

commit c4fb2cdf575d ("net: hns3: fix a bug for phy supported feature
initialization") adds default supported features for phy, but our hardware
also supports Asym Pause. This patch adds Asym Pause support to phy
default features to prevent Asym Pause can not be advertised when the phy
negotiates flow control.

Fixes: c4fb2cdf575d ("net: hns3: fix a bug for phy supported feature initialization")
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add support to update flow control settings after autoneg
Peng Li [Fri, 22 Dec 2017 04:21:52 +0000 (12:21 +0800)]
net: hns3: add support to update flow control settings after autoneg

When auto-negotiation is enabled, the MAC flow control settings is
based on the flow control negotiation result. And it should be configured
after a valid link has been established. This patch adds support to update
flow control settings after auto-negotiation has completed.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add support for set_pauseparam
Peng Li [Fri, 22 Dec 2017 04:21:51 +0000 (12:21 +0800)]
net: hns3: add support for set_pauseparam

This patch adds set_pauseparam support for ethtool cmd.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: fix for getting auto-negotiation state in hclge_get_autoneg
Fuyun Liang [Fri, 22 Dec 2017 04:21:50 +0000 (12:21 +0800)]
net: hns3: fix for getting auto-negotiation state in hclge_get_autoneg

When phy exists, we use the value of phydev.autoneg to represent the
auto-negotiation state of hardware. Otherwise, we use the value of
mac.autoneg to represent it.

This patch fixes for getting a error value of auto-negotiation state in
hclge_get_autoneg().

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: cleanup mac auto-negotiation state query
Fuyun Liang [Fri, 22 Dec 2017 04:21:49 +0000 (12:21 +0800)]
net: hns3: cleanup mac auto-negotiation state query

When checking whether auto-negotiation is on, driver only needs to
check the value of mac.autoneg(SW) directly, and does not need to
query it from hardware. Because this value is always synchronized
with the auto-negotiation state of hardware.

This patch removes the mac auto-negotiation state query.

Signed-off-by: Fuyun Liang <liangfuyun1@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add handling vlan tag offload in bd
Peng Li [Fri, 22 Dec 2017 04:21:48 +0000 (12:21 +0800)]
net: hns3: add handling vlan tag offload in bd

This patch deals with the vlan tag information between
sk_buff and rx/tx bd.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add ethtool related offload command
Peng Li [Fri, 22 Dec 2017 04:21:47 +0000 (12:21 +0800)]
net: hns3: add ethtool related offload command

This patch adds offload command related to "ethtool -K".

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add vlan offload config command
Peng Li [Fri, 22 Dec 2017 04:21:46 +0000 (12:21 +0800)]
net: hns3: add vlan offload config command

This patch adds vlan offload config commands, initializes
the rules of tx/rx vlan tag handle for hw.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add a mask initialization for mac_vlan table
Peng Li [Fri, 22 Dec 2017 04:21:45 +0000 (12:21 +0800)]
net: hns3: add a mask initialization for mac_vlan table

This patch sets vlan masked, in order to avoid the received
packets being filtered.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: get rss_size_max from configuration but not hardcode
Peng Li [Fri, 22 Dec 2017 04:21:44 +0000 (12:21 +0800)]
net: hns3: get rss_size_max from configuration but not hardcode

Add configuration for rss_size_max in hdev but not hardcode it.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Mingguang Qu <qumingguang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: free the ring_data structrue when change tqps
Peng Li [Fri, 22 Dec 2017 04:21:43 +0000 (12:21 +0800)]
net: hns3: free the ring_data structrue when change tqps

This patch fixes a memory leak problems in change tqps process,
the function hns3_uninit_all_ring and hns3_init_all_ring
may be called many times.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Mingguang Qu <qumingguang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: change the returned tqp number by ethtool -x
Peng Li [Fri, 22 Dec 2017 04:21:42 +0000 (12:21 +0800)]
net: hns3: change the returned tqp number by ethtool -x

This patch modifies the return data of get_rxnfc, it will return
the current handle's rss_size but not the total tqp number.
because the tc_size has been change to the log2 of roundup
power of two of rss_size.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Mingguang Qu <qumingguang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add support to modify tqps number
Peng Li [Fri, 22 Dec 2017 04:21:41 +0000 (12:21 +0800)]
net: hns3: add support to modify tqps number

This patch adds the support to change tqps number for PF driver
by using ehtool -L command.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Mingguang Qu <qumingguang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: add support to query tqps number
Peng Li [Fri, 22 Dec 2017 04:21:40 +0000 (12:21 +0800)]
net: hns3: add support to query tqps number

This patch adds the support to query tqps number for PF driver
by using ehtool -l command.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Mingguang Qu <qumingguang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: erspan: remove md NULL check
William Tu [Thu, 21 Dec 2017 23:51:22 +0000 (15:51 -0800)]
net: erspan: remove md NULL check

The 'md' is allocated from 'tun_dst = ip_tun_rx_dst' and
since we've checked 'tun_dst', 'md' will never be NULL.
The patch removes it at both ipv4 and ipv6 erspan.

Fixes: afb4c97d90e6 ("ip6_gre: fix potential memory leak in ip6erspan_rcv")
Fixes: 50670b6ee9bc ("ip_gre: fix potential memory leak in erspan_rcv")
Cc: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotcp: md5: Handle RCU dereference of md5sig_info
Mat Martineau [Thu, 21 Dec 2017 18:29:10 +0000 (10:29 -0800)]
tcp: md5: Handle RCU dereference of md5sig_info

Dereference tp->md5sig_info in tcp_v4_destroy_sock() the same way it is
done in the adjacent call to tcp_clear_md5_list().

Resolves this sparse warning:

net/ipv4/tcp_ipv4.c:1914:17: warning: incorrect type in argument 1 (different address spaces)
net/ipv4/tcp_ipv4.c:1914:17:    expected struct callback_head *head
net/ipv4/tcp_ipv4.c:1914:17:    got struct callback_head [noderef] <asn:4>*<noident>

Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Acked-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: lan9303: lan9303_csr_reg_wait cleanups
Egil Hjelmeland [Thu, 21 Dec 2017 17:34:35 +0000 (18:34 +0100)]
net: dsa: lan9303: lan9303_csr_reg_wait cleanups

Non-functional cleanups in lan9303_csr_reg_wait():
 - Change type of param 'mask' from int to u32.
 - Remove param 'value' (will probably never be used)
 - Reduced retries from 1000 to 25, consistent with lan9303_read_wait.
 - Removed comments

Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
Changes v1 -> v2:
 - Removed comments
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: Reinject IPv6 packets if IPsec policy matches after SNAT
Tobias Brunner [Thu, 21 Dec 2017 16:32:24 +0000 (17:32 +0100)]
ipv6: Reinject IPv6 packets if IPsec policy matches after SNAT

If SNAT modifies the source address the resulting packet might match
an IPsec policy, reinject the packet if that's the case.

The exact same thing is already done for IPv4.

Signed-off-by: Tobias Brunner <tobias@strongswan.org>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoenic: add wq clean up budget
Govindarajulu Varadarajan [Thu, 21 Dec 2017 16:12:28 +0000 (08:12 -0800)]
enic: add wq clean up budget

In case of tx clean up, we set '-1' as budget. This means clean up until
wq is empty or till (1 << 32) pkts are cleaned. Under heavy load this
will run for long time and cause
"watchdog: BUG: soft lockup - CPU#25 stuck for 21s!" warning.

This patch sets wq clean up budget to 256.

Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agortnetlink: Replace implementation of ASSERT_RTNL() macro with WARN_ONCE()
Leon Romanovsky [Thu, 21 Dec 2017 09:40:04 +0000 (11:40 +0200)]
rtnetlink: Replace implementation of ASSERT_RTNL() macro with WARN_ONCE()

ASSERT_RTNL() macro is actual open-coded variant of WARN_ONCE() with
two exceptions. First, it prints stack for multiple hits and not only
once as WARN_ONCE() does. Second, the user can disable prints of
WARN_ONCE by setting CONFIG_BUG to N.

The multiple prints of dump stack are actually not needed, because calls
without rtnl lock are programming errors and user can't do anything
about them except to complain to the mailing list after first occurrence
of such failure.

The user who disabled BUG/WARN prints did it explicitly because by default
in upstream kernel and distributions this option is enabled. It means
that user doesn't want to see prints about missing locks too.

This patch replaces open-coded variant in favor of already existing
macro and change error prints to be once only.

Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: mediatek: remove superfluous pin setup for MT7622 SoC
Sean Wang [Wed, 20 Dec 2017 09:47:06 +0000 (17:47 +0800)]
net: mediatek: remove superfluous pin setup for MT7622 SoC

Remove superfluous pin setup to get out of accessing invalid I/O pin
registers because the way for pin configuring tends to be different from
various SoCs and thus it should be better being managed and controlled by
the pinctrl driver which MT7622 already can support.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agodt-bindings: net: mediatek: add condition to property mediatek, pctl
Sean Wang [Wed, 20 Dec 2017 09:47:05 +0000 (17:47 +0800)]
dt-bindings: net: mediatek: add condition to property mediatek, pctl

The property "mediatek,pctl" is only required for SoCs such as MT2701 and
MT7623, so adding a few words for stating the condition.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
David S. Miller [Fri, 22 Dec 2017 16:16:31 +0000 (11:16 -0500)]
Merge git://git./linux/kernel/git/davem/net

Lots of overlapping changes.  Also on the net-next side
the XDP state management is handled more in the generic
layers so undo the 'net' nfp fix which isn't applicable
in net-next.

Include a necessary change by Jakub Kicinski, with log message:

====================
cls_bpf no longer takes care of offload tracking.  Make sure
netdevsim performs necessary checks.  This fixes a warning
caused by TC trying to remove a filter it has not added.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoxfrm: update the stats documentation
Shannon Nelson [Thu, 21 Dec 2017 22:26:18 +0000 (14:26 -0800)]
xfrm: update the stats documentation

Add a couple of stats that aren't in the documentation file
and rework the top description to be a little more readable.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 21 Dec 2017 23:57:30 +0000 (15:57 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller"
 "What's a holiday weekend without some networking bug fixes? [1]

   1) Fix some eBPF JIT bugs wrt. SKB pointers across helper function
      calls, from Daniel Borkmann.

   2) Fix regression from errata limiting change to marvell PHY driver,
      from Zhao Qiang.

   3) Fix u16 overflow in SCTP, from Xin Long.

   4) Fix potential memory leak during bridge newlink, from Nikolay
      Aleksandrov.

   5) Fix BPF selftest build on s390, from Hendrik Brueckner.

   6) Don't append to cfg80211 automatically generated certs file,
      always write new ones from scratch. From Thierry Reding.

   7) Fix sleep in atomic in mac80211 hwsim, from Jia-Ju Bai.

   8) Fix hang on tg3 MTU change with certain chips, from Brian King.

   9) Add stall detection to arc emac driver and reset chip when this
      happens, from Alexander Kochetkov.

  10) Fix MTU limitng in GRE tunnel drivers, from Xin Long.

  11) Fix stmmac timestamping bug due to mis-shifting of field. From
      Fredrik Hallenberg.

  12) Fix metrics match when deleting an ipv4 route. The kernel sets
      some internal metrics bits which the user isn't going to set when
      it makes the delete request. From Phil Sutter.

  13) mvneta driver loop over RX queues limits on "txq_number" :-) Fix
      from Yelena Krivosheev.

  14) Fix double free and memory corruption in get_net_ns_by_id, from
      Eric W. Biederman.

  15) Flush ipv4 FIB tables in the reverse order. Some tables can share
      their actual backing data, in particular this happens for the MAIN
      and LOCAL tables. We have to kill the LOCAL table first, because
      it uses MAIN's backing memory. Fix from Ido Schimmel.

  16) Several eBPF verifier value tracking fixes, from Edward Cree, Jann
      Horn, and Alexei Starovoitov.

  17) Make changes to ipv6 autoflowlabel sysctl really propagate to
      sockets, unless the socket has set the per-socket value
      explicitly. From Shaohua Li.

  18) Fix leaks and double callback invocations of zerocopy SKBs, from
      Willem de Bruijn"

[1] Is this a trick question? "Relaxing"? "Quiet"? "Fine"? - Linus.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (77 commits)
  skbuff: skb_copy_ubufs must release uarg even without user frags
  skbuff: orphan frags before zerocopy clone
  net: reevalulate autoflowlabel setting after sysctl setting
  openvswitch: Fix pop_vlan action for double tagged frames
  ipv6: Honor specified parameters in fibmatch lookup
  bpf: do not allow root to mangle valid pointers
  selftests/bpf: add tests for recent bugfixes
  bpf: fix integer overflows
  bpf: don't prune branches when a scalar is replaced with a pointer
  bpf: force strict alignment checks for stack pointers
  bpf: fix missing error return in check_stack_boundary()
  bpf: fix 32-bit ALU op verification
  bpf: fix incorrect tracking of register size truncation
  bpf: fix incorrect sign extension in check_alu_op()
  bpf/verifier: fix bounds calculation on BPF_RSH
  ipv4: Fix use-after-free when flushing FIB tables
  s390/qeth: fix error handling in checksum cmd callback
  tipc: remove joining group member from congested list
  selftests: net: Adding config fragment CONFIG_NUMA=y
  nfp: bpf: keep track of the offloaded program
  ...

7 years agoMerge branch 'flow_dissector-Provide-basic-batman-adv-unicast-handling'
David S. Miller [Thu, 21 Dec 2017 20:35:54 +0000 (15:35 -0500)]
Merge branch 'flow_dissector-Provide-basic-batman-adv-unicast-handling'

Sven Eckelmann says:

====================
flow_dissector: Provide basic batman-adv unicast handling

we are currently starting to use batman-adv as mesh protocol on multicore
embedded devices. These usually don't have a lot of CPU power per core but
are reasonable fast when using multiple cores.

It was noticed that sending was working very well but receiving was
basically only using on CPU core per neighbor. The reason for that is
format of the (normal) incoming packet:

  +--------------------+
  | ip(v6)hdr          |
  +--------------------+
  | inner ethhdr       |
  +--------------------+
  | batadv unicast hdr |
  +--------------------+
  | outer ethhdr       |
  +--------------------+

The flow dissector will therefore stop after parsing the outer ethernet
header and will not parse the actual ipv(4|6)/... header of the packet. Our
assumption was now that it would help us to add minimal support to the flow
dissector to jump over the batman-adv unicast and inner ethernet header
(like in gre ETH_P_TEB). The patch was implemented in a slightly hacky
way [1] and the results looked quite promising.

I didn't get any feedback how the files should actually be named. So I am
now just using the names from RFC v3

The discussion of the RFC v3 can be found in the related patches of
https://patchwork.ozlabs.org/cover/849345/

The discussion of the RFC v2 can be found in the related patches of
https://patchwork.ozlabs.org/cover/844783/

Changes in v4:
==============

* added  patch to change the u8/u16 to __u8/__u16 in
  include/uapi/linux/batadv_packet.h
  - requested by Willem de Bruijn <willemdebruijn.kernel@gmail.com>

Changes in v3:
==============

* removed change of uapi/linux/batman_adv.h to uapi/linux/batadv_genl.h
  - requested by Willem de Bruijn <willemdebruijn.kernel@gmail.com>
* removed naming fixes for enums/defines in uapi/linux/batadv_genl.h
  - requested by Willem de Bruijn <willemdebruijn.kernel@gmail.com>
* renamed uapi/linux/batadv.h to uapi/linux/batadv_packet.h
* moved batadv dissector functionality in own function
  - requested by Tom Herbert <tom@herbertland.com>
* added support for flags FLOW_DISSECTOR_F_STOP_AT_ENCAP and
  FLOW_DIS_ENCAPSULATION
  - requested by Willem de Bruijn <willemdebruijn.kernel@gmail.com>

Changes in v2:
==============

* removed the batman-adv unicast packet header definition from flow_dissector.c
* moved the batman-adv packet.h/uapi headers around to provide the correct
  definitions to flow_dissector.c
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoflow_dissector: Parse batman-adv unicast headers
Sven Eckelmann [Thu, 21 Dec 2017 09:17:42 +0000 (10:17 +0100)]
flow_dissector: Parse batman-adv unicast headers

The batman-adv unicast packets contain a full layer 2 frame in encapsulated
form. The flow dissector must therefore be able to parse the batman-adv
unicast header to reach the layer 2+3 information.

  +--------------------+
  | ip(v6)hdr          |
  +--------------------+
  | inner ethhdr       |
  +--------------------+
  | batadv unicast hdr |
  +--------------------+
  | outer ethhdr       |
  +--------------------+

The obtained information from the upper layer can then be used by RPS to
schedule the processing on separate cores. This allows better distribution
of multiple flows from the same neighbor to different cores.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobatman-adv: Convert packet.h to uapi header
Sven Eckelmann [Thu, 21 Dec 2017 09:17:41 +0000 (10:17 +0100)]
batman-adv: Convert packet.h to uapi header

The header file is used by different userspace programs to inject packets
or to decode sniffed packets. It should therefore be available to them as
userspace header.

Also other components in the kernel (like the flow dissector) require
access to the packet definitions to be able to decode ETH_P_BATMAN ethernet
packets.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobatman-adv: Remove kernel fixed width types in packet.h
Sven Eckelmann [Thu, 21 Dec 2017 09:17:40 +0000 (10:17 +0100)]
batman-adv: Remove kernel fixed width types in packet.h

The uapi headers use the __u8/__u16/... version of the fixed width types
instead of u8/u16/... The use of the latter must be avoided before
packet.h is copied to include/uapi/linux/.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobatman-adv: Remove usage of BIT(x) in packet.h
Sven Eckelmann [Thu, 21 Dec 2017 09:17:39 +0000 (10:17 +0100)]
batman-adv: Remove usage of BIT(x) in packet.h

The BIT(x) macro is no longer available for uapi headers because it is
defined outside of it (linux/bitops.h). The use of it must therefore be
avoided and replaced by an appropriate other representation.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobatman-adv: Let packet.h include its headers directly
Sven Eckelmann [Thu, 21 Dec 2017 09:17:38 +0000 (10:17 +0100)]
batman-adv: Let packet.h include its headers directly

The headers used by packet.h should also be included by it directly. main.h
is currently dealing with it in batman-adv, but this will no longer work
when this header is moved to include/uapi/linux/.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'sfc-Medford2'
David S. Miller [Thu, 21 Dec 2017 20:14:27 +0000 (15:14 -0500)]
Merge branch 'sfc-Medford2'

Bert Kenward says:

====================
sfc: support extra stats on Medford2

X2000-series NICs add port stats for two new features: FEC (Forward Error
 Correction, used on 25G links) and CTPIO (cut-through programmed I/O).
This patch series adds support for reporting both of these sets of stats

v2: add additional Signed-off-by
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosfc: expose CTPIO stats on NICs that support them
Bert Kenward [Thu, 21 Dec 2017 09:00:41 +0000 (09:00 +0000)]
sfc: expose CTPIO stats on NICs that support them

While the Linux driver doesn't use CTPIO ('cut-through programmed I/O'),
 other drivers on the same port might, so if we're responsible for
 reporting per-port stats we need to include the CTPIO stats.

Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosfc: expose FEC stats on Medford2
Edward Cree [Thu, 21 Dec 2017 09:00:36 +0000 (09:00 +0000)]
sfc: expose FEC stats on Medford2

There's no explicit capability bit, so we just condition them on having
 efx->num_mac_stats >= MC_CMD_MAC_NSTATS_V2.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosfc: support variable number of MAC stats
Edward Cree [Thu, 21 Dec 2017 09:00:26 +0000 (09:00 +0000)]
sfc: support variable number of MAC stats

Medford2 NICs support more than MC_CMD_MAC_NSTATS stats, and report the new
 count in a field of MC_CMD_GET_CAPABILITIES_V4.  This also means that the
 end generation count moves (it is, as before, the last 64 bits of the DMA
 buffer, but that is no longer MC_CMD_MAC_GENERATION_END).
So read num_mac_stats from the GET_CAPABILITIES response, if present;
 otherwise assume MC_CMD_MAC_NSTATS; and always use num_mac_stats - 1 rather
 than MC_CMD_MAC_GENERATION_END.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosfc: update MCDI protocol headers
Edward Cree [Thu, 21 Dec 2017 09:00:14 +0000 (09:00 +0000)]
sfc: update MCDI protocol headers

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agocxgb4: add new T5 and T6 device id's
Ganesh Goudar [Thu, 21 Dec 2017 08:59:56 +0000 (14:29 +0530)]
cxgb4: add new T5 and T6 device id's

Add device id's 0x50ac, 0x6087 for T5 and T6 cards
respectively.

Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dwc-xlgmac: Get rid of custom hex_dump_to_buffer()
Jie Deng [Thu, 21 Dec 2017 05:32:00 +0000 (13:32 +0800)]
net: dwc-xlgmac: Get rid of custom hex_dump_to_buffer()

Get rid of custom hex_dump_to_buffer().

The output is slightly changed, i.e. each byte followed by white space.

Note, we don't use print_hex_dump() here since the original code uses
nedev_dbg().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jie Deng <jiedeng@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agophylink: avoid attaching more than one PHY
Russell King [Wed, 20 Dec 2017 23:23:33 +0000 (23:23 +0000)]
phylink: avoid attaching more than one PHY

Attaching more than one PHY to phylink is bad news, as we store a
pointer to the PHY in a single location. Error out if more than one
PHY is attempted to be attached.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'net-zerocopy-fixes'
David S. Miller [Thu, 21 Dec 2017 20:00:59 +0000 (15:00 -0500)]
Merge branch 'net-zerocopy-fixes'

Saeed Mahameed says:

===================
Mellanox, mlx5 fixes 2017-12-19

The follwoing series includes some fixes for mlx5 core and etherent
driver.

Please pull and let me know if there is any problem.

This series doesn't introduce any conflict with the ongoing mlx5 for-next
submission.

For -stable:

kernels >= v4.7.y
    ("net/mlx5e: Fix possible deadlock of VXLAN lock")
    ("net/mlx5e: Add refcount to VXLAN structure")
    ("net/mlx5e: Prevent possible races in VXLAN control flow")
    ("net/mlx5e: Fix features check of IPv6 traffic")

kernels >= v4.9.y
    ("net/mlx5: Fix error flow in CREATE_QP command")
    ("net/mlx5: Fix rate limit packet pacing naming and struct")

kernels >= v4.13.y
    ("net/mlx5: FPGA, return -EINVAL if size is zero")

kernels >= v4.14.y
    ("Revert "mlx5: move affinity hints assignments to generic code")

All above patches apply and compile with no issues on corresponding -stable.
===================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoskbuff: skb_copy_ubufs must release uarg even without user frags
Willem de Bruijn [Wed, 20 Dec 2017 22:37:50 +0000 (17:37 -0500)]
skbuff: skb_copy_ubufs must release uarg even without user frags

skb_copy_ubufs creates a private copy of frags[] to release its hold
on user frags, then calls uarg->callback to notify the owner.

Call uarg->callback even when no frags exist. This edge case can
happen when zerocopy_sg_from_iter finds enough room in skb_headlen
to copy all the data.

Fixes: 3ece782693c4 ("sock: skb_copy_ubufs support for compound pages")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoskbuff: orphan frags before zerocopy clone
Willem de Bruijn [Wed, 20 Dec 2017 22:37:49 +0000 (17:37 -0500)]
skbuff: orphan frags before zerocopy clone

Call skb_zerocopy_clone after skb_orphan_frags, to avoid duplicate
calls to skb_uarg(skb)->callback for the same data.

skb_zerocopy_clone associates skb_shinfo(skb)->uarg from frag_skb
with each segment. This is only safe for uargs that do refcounting,
which is those that pass skb_orphan_frags without dropping their
shared frags. For others, skb_orphan_frags drops the user frags and
sets the uarg to NULL, after which sock_zerocopy_clone has no effect.

Qemu hangs were reported due to duplicate vhost_net_zerocopy_callback
calls for the same data causing the vhost_net_ubuf_ref_>refcount to
drop below zero.

Link: http://lkml.kernel.org/r/<CAF=yD-LWyCD4Y0aJ9O0e_CHLR+3JOeKicRRTEVCPxgw4XOcqGQ@mail.gmail.com>
Fixes: 1f8b977ab32d ("sock: enable MSG_ZEROCOPY")
Reported-by: Andreas Hartmann <andihartmann@01019freenet.de>
Reported-by: David Hill <dhill@redhat.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Thu, 21 Dec 2017 19:13:37 +0000 (11:13 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "It's been a few weeks, so here's a small collection of fixes that
  should go into the current series.

  This contains:

   - NVMe pull request from Christoph, with a few important fixes.

   - kyber hang fix from Omar.

   - A blk-throttl fix from Shaohua, fixing a case where we double
     charge a bio.

   - Two call_single_data alignment fixes from me, fixing up some
     unfortunate changes that went into 4.14 without being properly
     reviewed on the block side (since nobody was CC'ed on the
     patch...).

   - A bounce buffer fix in two parts, one from me and one from Ming.

   - Revert bdi debug error handling patch. It's causing boot issues for
     some folks, and a week down the line, we're still no closer to a
     fix. Revert this patch for now until it's figured out, then we can
     retry for 4.16"

* 'for-linus' of git://git.kernel.dk/linux-block:
  Revert "bdi: add error handle for bdi_debug_register"
  null_blk: unalign call_single_data
  block: unalign call_single_data in struct request
  block-throttle: avoid double charge
  block: fix blk_rq_append_bio
  block: don't let passthrough IO go into .make_request_fn()
  nvme: setup streams after initializing namespace head
  nvme: check hw sectors before setting chunk sectors
  nvme: call blk_integrity_unregister after queue is cleaned up
  nvme-fc: remove double put reference if admin connect fails
  nvme: set discard_alignment to zero
  kyber: fix another domain token wait queue hang

7 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Thu, 21 Dec 2017 18:44:13 +0000 (10:44 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "ARM fixes:
   - A bug in handling of SPE state for non-vhe systems
   - A fix for a crash on system shutdown
   - Three timer fixes, introduced by the timer optimizations for v4.15

  x86 fixes:
   - fix for a WARN that was introduced in 4.15
   - fix for SMM when guest uses PCID
   - fixes for several bugs found by syzkaller

  ... and a dozen papercut fixes for the kvm_stat tool"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits)
  tools/kvm_stat: sort '-f help' output
  kvm: x86: fix RSM when PCID is non-zero
  KVM: Fix stack-out-of-bounds read in write_mmio
  KVM: arm/arm64: Fix timer enable flow
  KVM: arm/arm64: Properly handle arch-timer IRQs after vtimer_save_state
  KVM: arm/arm64: timer: Don't set irq as forwarded if no usable GIC
  KVM: arm/arm64: Fix HYP unmapping going off limits
  arm64: kvm: Prevent restoring stale PMSCR_EL1 for vcpu
  KVM/x86: Check input paging mode when cs.l is set
  tools/kvm_stat: add line for totals
  tools/kvm_stat: stop ignoring unhandled arguments
  tools/kvm_stat: suppress usage information on command line errors
  tools/kvm_stat: handle invalid regular expressions
  tools/kvm_stat: add hint on '-f help' to man page
  tools/kvm_stat: fix child trace events accounting
  tools/kvm_stat: fix extra handling of 'help' with fields filter
  tools/kvm_stat: fix missing field update after filter change
  tools/kvm_stat: fix drilldown in events-by-guests mode
  tools/kvm_stat: fix command line option '-g'
  kvm: x86: fix WARN due to uninitialized guest FPU state
  ...

7 years agonet: ibm: emac: support RGMII-[RX|TX]ID phymode
Christian Lamparter [Wed, 20 Dec 2017 22:01:50 +0000 (23:01 +0100)]
net: ibm: emac: support RGMII-[RX|TX]ID phymode

The RGMII spec allows compliance for devices that implement an internal
delay on TXC and/or RXC inside the transmitter. This patch adds the
necessary RGMII_[RX|TX]ID mode code to handle such PHYs with the
emac driver.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ibm: emac: replace custom PHY_MODE_* macros
Christian Lamparter [Wed, 20 Dec 2017 22:01:49 +0000 (23:01 +0100)]
net: ibm: emac: replace custom PHY_MODE_* macros

The ibm_emac driver predates the PHY_INTERFACE_MODE_*
enums by a few years.

And while the driver has been retrofitted to use the PHYLIB,
the old definitions have stuck around to this day.

This patch replaces all occurences of PHY_MODE_* with
the respective equivalent PHY_INTERFACE_MODE_* enum.
And finally, it purges the old macros for good.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ibm: emac: replace custom rgmii_mode_name with phy_modes
Christian Lamparter [Wed, 20 Dec 2017 22:01:48 +0000 (23:01 +0100)]
net: ibm: emac: replace custom rgmii_mode_name with phy_modes

phy_modes() in the common phy.h already defines the same phy mode
names in lower case. The deleted rgmii_mode_name() is used only
in one place and for a "notice-level" printk. Hence, it will not
be missed.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: reevalulate autoflowlabel setting after sysctl setting
Shaohua Li [Wed, 20 Dec 2017 20:10:21 +0000 (12:10 -0800)]
net: reevalulate autoflowlabel setting after sysctl setting

sysctl.ip6.auto_flowlabels is default 1. In our hosts, we set it to 2.
If sockopt doesn't set autoflowlabel, outcome packets from the hosts are
supposed to not include flowlabel. This is true for normal packet, but
not for reset packet.

The reason is ipv6_pinfo.autoflowlabel is set in sock creation. Later if
we change sysctl.ip6.auto_flowlabels, the ipv6_pinfo.autoflowlabel isn't
changed, so the sock will keep the old behavior in terms of auto
flowlabel. Reset packet is suffering from this problem, because reset
packet is sent from a special control socket, which is created at boot
time. Since sysctl.ipv6.auto_flowlabels is 1 by default, the control
socket will always have its ipv6_pinfo.autoflowlabel set, even after
user set sysctl.ipv6.auto_flowlabels to 1, so reset packset will always
have flowlabel. Normal sock created before sysctl setting suffers from
the same issue. We can't even turn off autoflowlabel unless we kill all
socks in the hosts.

To fix this, if IPV6_AUTOFLOWLABEL sockopt is used, we use the
autoflowlabel setting from user, otherwise we always call
ip6_default_np_autolabel() which has the new settings of sysctl.

Note, this changes behavior a little bit. Before commit 42240901f7c4
(ipv6: Implement different admin modes for automatic flow labels), the
autoflowlabel behavior of a sock isn't sticky, eg, if sysctl changes,
existing connection will change autoflowlabel behavior. After that
commit, autoflowlabel behavior is sticky in the whole life of the sock.
With this patch, the behavior isn't sticky again.

Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Tom Herbert <tom@quantonium.net>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoopenvswitch: Fix pop_vlan action for double tagged frames
Eric Garver [Wed, 20 Dec 2017 20:09:22 +0000 (15:09 -0500)]
openvswitch: Fix pop_vlan action for double tagged frames

skb_vlan_pop() expects skb->protocol to be a valid TPID for double
tagged frames. So set skb->protocol to the TPID and let skb_vlan_pop()
shift the true ethertype into position for us.

Fixes: 5108bbaddc37 ("openvswitch: add processing of L3 packets")
Signed-off-by: Eric Garver <e@erig.me>
Reviewed-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'net-sched-extack'
David S. Miller [Thu, 21 Dec 2017 17:32:52 +0000 (12:32 -0500)]
Merge branch 'net-sched-extack'

Alexander Aring says:

====================
net: sched: sch: introduce extack support

this patch series basically add support for extack in common qdisc handling.
Additional it adds extack pointer to common qdisc callback handling this
offers per qdisc implementation to setting the extack message for each
failure over netlink.

The extack message will be set deeper in qdisc functions but going not
deeper as net core api. For qdisc module callback handling, the extack
will not be set. This will be part of per qdisc extack handling.

I also want to prepare patches to handle extack per qdisc module...
so there will come a lot of more patches, just cut them down to make
it reviewable.

There are some above 80-chars width warnings, which I ignore because
it looks more ugly otherwise.

This patch-series based on patches by David Ahern which gave me some
hints how to deal with extack support.

Cc: David Ahern <dsahern@gmail.com>
changes since v4:
 - rebase on current net-next/master
 - fix several typos (also David Ahren to Ahern, I am sorry)
 - Add acked by Jamal

changes since v3:
 - remove patch 2/2 lib: nlattr: set extack msg if validate_nla fails since
   David Ahern has a better solution
 - Remove check on net admin permission since -EPERM indicates it already
 - Change rtab to "rate table" - this is what it's stands for
 - Fix cbs *not* support messages
 - Fix tcf block error message for allocation, allocation will be still there
   because there are multiple places which returns -ENOMEM
 - Finnally also took care about sch_atm, sorry somehow I forgot this one and
   I hope I didn't forgot any sch implementation to add new callback parameters

changes since v2:
 - add fix coding style patch to catch all checkpatch warnings
 - add patch for setting netlink extack msg if validate_nla fails
 - changes in handle generic qdisc errors
   - remove NL_SET_ERR_MSG from memory allocation errors
   - remove NL_SET_ERR_MSG from device not found
   - change STAB to table size
 - add various new patches to add extack support for common
   TC functions like qdisc_get_rtab, tcf_block_get, qdisc_alloc
   and qdisc_create_dflt - users which are interessted in the
   detailed error messages can assign extack, otherwise NULL.
 - Add sch_cbq as example for qdisc_ops callback: init,
   qdisc_class_ops callbacks: change and graft
 - Add sch_cbs as example for qdisc_ops callback: change
 - Add sch_drr as example for qdisc_class ops callbacks: tcf_block
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: sch_drr: add extack support
Alexander Aring [Wed, 20 Dec 2017 17:35:24 +0000 (12:35 -0500)]
net: sch: sch_drr: add extack support

This patch adds extack support for the drr qdisc implementation by
adding NL_SET_ERR_MSG in validation of user input.
Also it serves to illustrate a use case of how the infrastructure ops
api changes are to be used by individual qdiscs.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: sch_cbs: add extack support
Alexander Aring [Wed, 20 Dec 2017 17:35:23 +0000 (12:35 -0500)]
net: sch: sch_cbs: add extack support

This patch adds extack support for the cbs qdisc implementation by
adding NL_SET_ERR_MSG in validation of user input.
Also it serves to illustrate a use case of how the infrastructure ops
api changes are to be used by individual qdiscs.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: sch_cbq: add extack support
Alexander Aring [Wed, 20 Dec 2017 17:35:22 +0000 (12:35 -0500)]
net: sch: sch_cbq: add extack support

This patch adds extack support for the cbq qdisc implementation by
adding NL_SET_ERR_MSG in validation of user input.
Also it serves to illustrate a use case of how the infrastructure ops
api changes are to be used by individual qdiscs.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: api: add extack support in qdisc_create_dflt
Alexander Aring [Wed, 20 Dec 2017 17:35:21 +0000 (12:35 -0500)]
net: sch: api: add extack support in qdisc_create_dflt

This patch adds extack support for the function qdisc_create_dflt which is
a common used function in the tc subsystem. Callers which are interested
in the receiving error can assign extack to get a more detailed
information why qdisc_create_dflt failed. The function qdisc_create_dflt
will also call an init callback which can fail by any per-qdisc specific
handling.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: api: add extack support in qdisc_alloc
Alexander Aring [Wed, 20 Dec 2017 17:35:20 +0000 (12:35 -0500)]
net: sch: api: add extack support in qdisc_alloc

This patch adds extack support for the function qdisc_alloc which is
a common used function in the tc subsystem. Callers which are interested
in the receiving error can assign extack to get a more detailed
information why qdisc_alloc failed.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: api: add extack support in tcf_block_get
Alexander Aring [Wed, 20 Dec 2017 17:35:19 +0000 (12:35 -0500)]
net: sch: api: add extack support in tcf_block_get

This patch adds extack support for the function tcf_block_get which is
a common used function in the tc subsystem. Callers which are interested
in the receiving error can assign extack to get a more detailed
information why tcf_block_get failed.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sch: api: add extack support in qdisc_get_rtab
Alexander Aring [Wed, 20 Dec 2017 17:35:18 +0000 (12:35 -0500)]
net: sch: api: add extack support in qdisc_get_rtab

This patch adds extack support for the function qdisc_get_rtab which is
a common used function in the tc subsystem. Callers which are interested
in the receiving error can assign extack to get a more detailed
information why qdisc_get_rtab failed.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: sch: add extack for graft callback
Alexander Aring [Wed, 20 Dec 2017 17:35:17 +0000 (12:35 -0500)]
net: sched: sch: add extack for graft callback

This patch adds extack support for graft callback to prepare per-qdisc
specific changes for extack.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: sch: add extack for block callback
Alexander Aring [Wed, 20 Dec 2017 17:35:16 +0000 (12:35 -0500)]
net: sched: sch: add extack for block callback

This patch adds extack support for block callback to prepare per-qdisc
specific changes for extack.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: sch: add extack to change class
Alexander Aring [Wed, 20 Dec 2017 17:35:15 +0000 (12:35 -0500)]
net: sched: sch: add extack to change class

This patch adds extack support for class change callback api. This prepares
to handle extack support inside each specific class implementation.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: sch: add extack for change qdisc ops
Alexander Aring [Wed, 20 Dec 2017 17:35:14 +0000 (12:35 -0500)]
net: sched: sch: add extack for change qdisc ops

This patch adds extack support for change callback for qdisc ops
structtur to prepare per-qdisc specific changes for extack.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: sch: add extack for init callback
Alexander Aring [Wed, 20 Dec 2017 17:35:13 +0000 (12:35 -0500)]
net: sched: sch: add extack for init callback

This patch adds extack support for init callback to prepare per-qdisc
specific changes for extack.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: sch_api: handle generic qdisc errors
Alexander Aring [Wed, 20 Dec 2017 17:35:12 +0000 (12:35 -0500)]
net: sched: sch_api: handle generic qdisc errors

This patch adds extack support for generic qdisc handling. The extack
will be set deeper to each called function which is not part of netdev
core api.

Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: fix coding style issues
Alexander Aring [Wed, 20 Dec 2017 17:35:11 +0000 (12:35 -0500)]
net: sched: fix coding style issues

This patch fix checkpatch issues for upcomming patches according to the
sched api file. It changes mostly how to check on null pointer.

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoRevert "bdi: add error handle for bdi_debug_register"
Jens Axboe [Thu, 21 Dec 2017 17:01:30 +0000 (10:01 -0700)]
Revert "bdi: add error handle for bdi_debug_register"

This reverts commit a0747a859ef6d3cc5b6cd50eb694499b78dd0025.

It breaks some booting for some users, and more than a week
into this, there's still no good fix. Revert this commit
for now until a solution has been found.

Reported-by: Laura Abbott <labbott@redhat.com>
Reported-by: Bruno Wolff III <bruno@wolff.to>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
7 years agoipv6: Honor specified parameters in fibmatch lookup
Ido Schimmel [Wed, 20 Dec 2017 10:28:25 +0000 (12:28 +0200)]
ipv6: Honor specified parameters in fibmatch lookup

Currently, parameters such as oif and source address are not taken into
account during fibmatch lookup. Example (IPv4 for reference) before
patch:

$ ip -4 route show
192.0.2.0/24 dev dummy0 proto kernel scope link src 192.0.2.1
198.51.100.0/24 dev dummy1 proto kernel scope link src 198.51.100.1

$ ip -6 route show
2001:db8:1::/64 dev dummy0 proto kernel metric 256 pref medium
2001:db8:2::/64 dev dummy1 proto kernel metric 256 pref medium
fe80::/64 dev dummy0 proto kernel metric 256 pref medium
fe80::/64 dev dummy1 proto kernel metric 256 pref medium

$ ip -4 route get fibmatch 192.0.2.2 oif dummy0
192.0.2.0/24 dev dummy0 proto kernel scope link src 192.0.2.1
$ ip -4 route get fibmatch 192.0.2.2 oif dummy1
RTNETLINK answers: No route to host

$ ip -6 route get fibmatch 2001:db8:1::2 oif dummy0
2001:db8:1::/64 dev dummy0 proto kernel metric 256 pref medium
$ ip -6 route get fibmatch 2001:db8:1::2 oif dummy1
2001:db8:1::/64 dev dummy0 proto kernel metric 256 pref medium

After:

$ ip -6 route get fibmatch 2001:db8:1::2 oif dummy0
2001:db8:1::/64 dev dummy0 proto kernel metric 256 pref medium
$ ip -6 route get fibmatch 2001:db8:1::2 oif dummy1
RTNETLINK answers: Network is unreachable

The problem stems from the fact that the necessary route lookup flags
are not set based on these parameters.

Instead of duplicating the same logic for fibmatch, we can simply
resolve the original route from its copy and dump it instead.

Fixes: 18c3a61c4264 ("net: ipv6: RTM_GETROUTE: return matched fib result when requested")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotools/kvm_stat: sort '-f help' output
Stefan Raspl [Thu, 21 Dec 2017 12:03:27 +0000 (13:03 +0100)]
tools/kvm_stat: sort '-f help' output

Sort the fields returned by specifying '-f help' on the command line.
While at it, simplify the code a bit, indent the output and eliminate an
extra blank line at the beginning.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agokvm: x86: fix RSM when PCID is non-zero
Paolo Bonzini [Wed, 20 Dec 2017 23:49:14 +0000 (00:49 +0100)]
kvm: x86: fix RSM when PCID is non-zero

rsm_load_state_64() and rsm_enter_protected_mode() load CR3, then
CR4 & ~PCIDE, then CR0, then CR4.

However, setting CR4.PCIDE fails if CR3[11:0] != 0.  It's probably easier
in the long run to replace rsm_enter_protected_mode() with an emulator
callback that sets all the special registers (like KVM_SET_SREGS would
do).  For now, set the PCID field of CR3 only after CR4.PCIDE is 1.

Reported-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Fixes: 660a5d517aaab9187f93854425c4c63f4a09195c
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agoxfrm: wrap xfrmdev_ops with offload config
Shannon Nelson [Tue, 19 Dec 2017 23:35:49 +0000 (15:35 -0800)]
xfrm: wrap xfrmdev_ops with offload config

There's no reason to define netdev->xfrmdev_ops if
the offload facility is not CONFIG'd in.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 years agoxfrm: check for xdo_dev_ops add and delete
Shannon Nelson [Tue, 19 Dec 2017 23:35:48 +0000 (15:35 -0800)]
xfrm: check for xdo_dev_ops add and delete

This adds a check for the required add and delete functions up front
at registration time to be sure both are defined.

Since both the features check and the registration check are looking
at the same things, break out the check for both to call.

Lastly, for some reason the feature check was setting xfrmdev_ops to
NULL if the NETIF_F_HW_ESP bit was missing, which would probably
surprise the driver later if the driver turned its NETIF_F_HW_ESP bit
back on.  We shouldn't be messing with the driver's callback list, so
we stop doing that with this patch.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 years agoxfrm: check for xdo_dev_state_free
Shannon Nelson [Tue, 19 Dec 2017 23:35:47 +0000 (15:35 -0800)]
xfrm: check for xdo_dev_state_free

The current XFRM code assumes that we've implemented the
xdo_dev_state_free() callback, even if it is meaningless to the driver.
This patch adds a check for it before calling, as done in other APIs,
to prevent a NULL function pointer kernel crash.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Thu, 21 Dec 2017 04:10:29 +0000 (23:10 -0500)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2017-12-21

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Fix multiple security issues in the BPF verifier mostly related
   to the value and min/max bounds tracking rework in 4.14. Issues
   range from incorrect bounds calculation in some BPF_RSH cases,
   to improper sign extension and reg size handling on 32 bit
   ALU ops, missing strict alignment checks on stack pointers, and
   several others that got fixed, from Jann, Alexei and Edward.

2) Fix various build failures in BPF selftests on sparc64. More
   specifically, librt needed to be added to the libs to link
   against and few format string fixups for sizeof, from David.

3) Fix one last remaining issue from BPF selftest build that was
   still occuring on s390x from the asm/bpf_perf_event.h include
   which could not find the asm/ptrace.h copy, from Hendrik.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: do not allow root to mangle valid pointers
Alexei Starovoitov [Tue, 19 Dec 2017 04:15:20 +0000 (20:15 -0800)]
bpf: do not allow root to mangle valid pointers

Do not allow root to convert valid pointers into unknown scalars.
In particular disallow:
 ptr &= reg
 ptr <<= reg
 ptr += ptr
and explicitly allow:
 ptr -= ptr
since pkt_end - pkt == length

1.
This minimizes amount of address leaks root can do.
In the future may need to further tighten the leaks with kptr_restrict.

2.
If program has such pointer math it's likely a user mistake and
when verifier complains about it right away instead of many instructions
later on invalid memory access it's easier for users to fix their progs.

3.
when register holding a pointer cannot change to scalar it allows JITs to
optimize better. Like 32-bit archs could use single register for pointers
instead of a pair required to hold 64-bit scalars.

4.
reduces architecture dependent behavior. Since code:
r1 = r10;
r1 &= 0xff;
if (r1 ...)
will behave differently arm64 vs x64 and offloaded vs native.

A significant chunk of ptr mangling was allowed by
commit f1174f77b50c ("bpf/verifier: rework value tracking")
yet some of it was allowed even earlier.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agoMerge branch 'bpf-verifier-sec-fixes'
Daniel Borkmann [Thu, 21 Dec 2017 01:15:42 +0000 (02:15 +0100)]
Merge branch 'bpf-verifier-sec-fixes'

Alexei Starovoitov says:

====================
This patch set addresses a set of security vulnerabilities
in bpf verifier logic discovered by Jann Horn.
All of the patches are candidates for 4.14 stable.
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agoselftests/bpf: add tests for recent bugfixes
Jann Horn [Tue, 19 Dec 2017 04:12:01 +0000 (20:12 -0800)]
selftests/bpf: add tests for recent bugfixes

These tests should cover the following cases:

 - MOV with both zero-extended and sign-extended immediates
 - implicit truncation of register contents via ALU32/MOV32
 - implicit 32-bit truncation of ALU32 output
 - oversized register source operand for ALU32 shift
 - right-shift of a number that could be positive or negative
 - map access where adding the operation size to the offset causes signed
   32-bit overflow
 - direct stack access at a ~4GiB offset

Also remove the F_LOAD_WITH_STRICT_ALIGNMENT flag from a bunch of tests
that should fail independent of what flags userspace passes.

Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf: fix integer overflows
Alexei Starovoitov [Tue, 19 Dec 2017 04:12:00 +0000 (20:12 -0800)]
bpf: fix integer overflows

There were various issues related to the limited size of integers used in
the verifier:
 - `off + size` overflow in __check_map_access()
 - `off + reg->off` overflow in check_mem_access()
 - `off + reg->var_off.value` overflow or 32-bit truncation of
   `reg->var_off.value` in check_mem_access()
 - 32-bit truncation in check_stack_boundary()

Make sure that any integer math cannot overflow by not allowing
pointer math with large values.

Also reduce the scope of "scalar op scalar" tracking.

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf: don't prune branches when a scalar is replaced with a pointer
Jann Horn [Tue, 19 Dec 2017 04:11:59 +0000 (20:11 -0800)]
bpf: don't prune branches when a scalar is replaced with a pointer

This could be made safe by passing through a reference to env and checking
for env->allow_ptr_leaks, but it would only work one way and is probably
not worth the hassle - not doing it will not directly lead to program
rejection.

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf: force strict alignment checks for stack pointers
Jann Horn [Tue, 19 Dec 2017 04:11:58 +0000 (20:11 -0800)]
bpf: force strict alignment checks for stack pointers

Force strict alignment checks for stack pointers because the tracking of
stack spills relies on it; unaligned stack accesses can lead to corruption
of spilled registers, which is exploitable.

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf: fix missing error return in check_stack_boundary()
Jann Horn [Tue, 19 Dec 2017 04:11:57 +0000 (20:11 -0800)]
bpf: fix missing error return in check_stack_boundary()

Prevent indirect stack accesses at non-constant addresses, which would
permit reading and corrupting spilled pointers.

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf: fix 32-bit ALU op verification
Jann Horn [Tue, 19 Dec 2017 04:11:56 +0000 (20:11 -0800)]
bpf: fix 32-bit ALU op verification

32-bit ALU ops operate on 32-bit values and have 32-bit outputs.
Adjust the verifier accordingly.

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf: fix incorrect tracking of register size truncation
Jann Horn [Tue, 19 Dec 2017 04:11:55 +0000 (20:11 -0800)]
bpf: fix incorrect tracking of register size truncation

Properly handle register truncation to a smaller size.

The old code first mirrors the clearing of the high 32 bits in the bitwise
tristate representation, which is correct. But then, it computes the new
arithmetic bounds as the intersection between the old arithmetic bounds and
the bounds resulting from the bitwise tristate representation. Therefore,
when coerce_reg_to_32() is called on a number with bounds
[0xffff'fff8, 0x1'0000'0007], the verifier computes
[0xffff'fff8, 0xffff'ffff] as bounds of the truncated number.
This is incorrect: The truncated number could also be in the range [0, 7],
and no meaningful arithmetic bounds can be computed in that case apart from
the obvious [0, 0xffff'ffff].

Starting with v4.14, this is exploitable by unprivileged users as long as
the unprivileged_bpf_disabled sysctl isn't set.

Debian assigned CVE-2017-16996 for this issue.

v2:
 - flip the mask during arithmetic bounds calculation (Ben Hutchings)
v3:
 - add CVE number (Ben Hutchings)

Fixes: b03c9f9fdc37 ("bpf/verifier: track signed and unsigned min/max values")
Signed-off-by: Jann Horn <jannh@google.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf: fix incorrect sign extension in check_alu_op()
Jann Horn [Tue, 19 Dec 2017 04:11:54 +0000 (20:11 -0800)]
bpf: fix incorrect sign extension in check_alu_op()

Distinguish between
BPF_ALU64|BPF_MOV|BPF_K (load 32-bit immediate, sign-extended to 64-bit)
and BPF_ALU|BPF_MOV|BPF_K (load 32-bit immediate, zero-padded to 64-bit);
only perform sign extension in the first case.

Starting with v4.14, this is exploitable by unprivileged users as long as
the unprivileged_bpf_disabled sysctl isn't set.

Debian assigned CVE-2017-16995 for this issue.

v3:
 - add CVE number (Ben Hutchings)

Fixes: 484611357c19 ("bpf: allow access into map value arrays")
Signed-off-by: Jann Horn <jannh@google.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agobpf/verifier: fix bounds calculation on BPF_RSH
Edward Cree [Tue, 19 Dec 2017 04:11:53 +0000 (20:11 -0800)]
bpf/verifier: fix bounds calculation on BPF_RSH

Incorrect signed bounds were being computed.
If the old upper signed bound was positive and the old lower signed bound was
negative, this could cause the new upper signed bound to be too low,
leading to security issues.

Fixes: b03c9f9fdc37 ("bpf/verifier: track signed and unsigned min/max values")
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
[jannh@google.com: changed description to reflect bug impact]
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
7 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Thu, 21 Dec 2017 00:52:01 +0000 (16:52 -0800)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two simple fixes: one for sparse warnings that were introduced by the
  merge window conversion to blist_flags_t and the other to fix dropped
  I/O during reset in aacraid"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: aacraid: Fix I/O drop during reset
  scsi: core: Use blist_flags_t consistently

7 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Thu, 21 Dec 2017 00:47:14 +0000 (16:47 -0800)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fix from Russell King:
 "Just one fix for a problem in the csum_partial_copy_from_user()
  implementation when software PAN is enabled"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8731/1: Fix csum_partial_copy_from_user() stack mismatch

7 years agoMerge tag 'acpi-4.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Wed, 20 Dec 2017 21:44:21 +0000 (13:44 -0800)]
Merge tag 'acpi-4.15-rc5' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "These fix a recently introduced issue in the ACPI CPPC driver and an
  obscure error hanling bug in the APEI code.

  Specifics:

   - Fix an error handling issue in the ACPI APEI implementation of the
     >read callback in struct pstore_info (Takashi Iwai).

   - Fix a possible out-of-bounds arrar read in the ACPI CPPC driver
     (Colin Ian King)"

* tag 'acpi-4.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: APEI / ERST: Fix missing error handling in erst_reader()
  ACPI: CPPC: remove initial assignment of pcc_ss_data