From: Christoph Hellwig <hch@lst.de>
Date: Sat, 4 Nov 2017 10:44:46 +0000 (+0300)
Subject: coredump: call do_unlinkat directly instead of sys_unlink
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=96271654f55c74ff7325fbdfc535466c9deb0ce6;p=openwrt%2Fstaging%2Fblogic.git

coredump: call do_unlinkat directly instead of sys_unlink

And stop messing with the address limit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/coredump.c b/fs/coredump.c
index 0eec03696707..cd72a4ca0cec 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -679,16 +679,11 @@ void do_coredump(const siginfo_t *siginfo)
 		 * privs and don't want to unlink another user's coredump.
 		 */
 		if (!need_suid_safe) {
-			mm_segment_t old_fs;
-
-			old_fs = get_fs();
-			set_fs(KERNEL_DS);
 			/*
 			 * If it doesn't exist, that's fine. If there's some
 			 * other problem, we'll catch it at the filp_open().
 			 */
-			(void) sys_unlink((const char __user *)cn.corename);
-			set_fs(old_fs);
+			do_unlinkat(AT_FDCWD, getname_kernel(cn.corename));
 		}
 
 		/*