Danilo Krummrich b621438301 fs/proc/proc_sysctl.c: fix potential page fault while unregistering sysctl table ...

[ Upstream commit a0b0d1c345 ]

proc_sys_link_fill_cache() does not take currently unregistering sysctl
tables into account, which might result into a page fault in
sysctl_follow_link() - add a check to fix it.

This bug has been present since v3.4.

Link: http://lkml.kernel.org/r/20180228013506.4915-1-danilokrummrich@dk-develop.de
Fixes: 0e47c99d7f ("sysctl: Replace root_list with links between sysctl_table_sets")
Signed-off-by: Danilo Krummrich <danilokrummrich@dk-develop.de>
Acked-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-05-30 07:50:40 +02:00

..

array.c

proc: Use underscores for SSBD in 'status'

2018-05-22 16:58:02 +02:00

base.c

proc: fix /proc/*/map_files lookup

2018-05-30 07:50:25 +02:00

cmdline.c

…

consoles.c

…

cpuinfo.c

…

devices.c

…

fd.c

proc: unsigned file descriptors

2016-09-27 18:47:38 -04:00

fd.h

proc: unsigned file descriptors

2016-09-27 18:47:38 -04:00

generic.c

proc: Fix unbalanced hard link numbers

2017-05-25 15:44:37 +02:00

inode.c

fs: Replace CURRENT_TIME with current_time() for inode timestamps

2016-09-27 21:06:21 -04:00

internal.h

proc: unsigned file descriptors

2016-09-27 18:47:38 -04:00

interrupts.c

…

Kconfig

…

kcore.c

vfs/proc/kcore, x86/mm/kcore: Fix SMAP fault when dumping vsyscall user page

2018-05-30 07:50:26 +02:00

kmsg.c

…

loadavg.c

…

Makefile

fs/proc: Add compiler check for -Wno-override-init to support gcc < 4.2

2016-08-03 12:45:23 -04:00

meminfo.c

meminfo: break apart a very long seq_printf with #ifdefs

2016-10-07 18:46:30 -07:00

namespaces.c

…

nommu.c

…

page.c

…

proc_net.c

proc: make proc entries inherit ownership from parent

2016-08-14 21:07:20 -07:00

proc_sysctl.c

fs/proc/proc_sysctl.c: fix potential page fault while unregistering sysctl table

2018-05-30 07:50:40 +02:00

proc_tty.c

tty fix oops when rmmod 8250

2017-12-20 10:07:32 +01:00

root.c

proc: Convert proc_mount to use mount_ns.

2016-06-23 15:41:54 -05:00

self.c

fs: Replace CURRENT_TIME with current_time() for inode timestamps

2016-09-27 21:06:21 -04:00

softirqs.c

…

stat.c

seq/proc: modify seq_put_decimal_[u]ll to take a const char *, not char

2016-10-07 18:46:30 -07:00

task_mmu.c

mm: larger stack guard gap, between vmas

2017-06-24 07:11:18 +02:00

task_nommu.c

fs/proc: Stop trying to report thread stacks

2016-10-20 09:21:41 +02:00

thread_self.c

fs: Replace CURRENT_TIME with current_time() for inode timestamps

2016-09-27 21:06:21 -04:00

uptime.c

…

version.c

…

vmcore.c

…