Danilo Krummrich ab29b0aee3 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 08:17:20 +02:00

..

array.c

proc: Use underscores for SSBD in 'status'

2018-05-22 18:56:29 +02:00

base.c

proc: do not access cmdline nor environ from file-backed areas

2018-05-19 10:19:37 +02:00

cmdline.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

consoles.c

fs/proc/consoles.c: use seq_putc() in show_console_dev()

2018-02-06 18:32:44 -08:00

cpuinfo.c

x86 / CPU: Always show current CPU frequency in /proc/cpuinfo

2017-11-15 19:46:50 +01:00

devices.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

fd.c

proc: use %u for pid printing and slightly less stack

2018-02-06 18:32:43 -08:00

fd.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

generic.c

proc: rearrange args

2018-02-06 18:32:43 -08:00

inode.c

proc: spread likely/unlikely a bit

2018-02-06 18:32:43 -08:00

internal.h

proc: rearrange args

2018-02-06 18:32:43 -08:00

interrupts.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Kconfig

fs, proc: add help for CONFIG_PROC_CHILDREN

2015-07-17 16:39:52 -07:00

kcore.c

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

2018-02-13 09:15:58 +01:00

kmsg.c

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11 14:34:03 -08:00

loadavg.c

pid: replace pid bitmap implementation with IDR API

2017-11-17 16:10:03 -08:00

Makefile

proc: : uninline name_to_int()

2017-11-17 16:10:00 -08:00

meminfo.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

namespaces.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

nommu.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

page.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

proc_net.c

proc: rearrange args

2018-02-06 18:32:43 -08:00

proc_sysctl.c

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

2018-05-30 08:17:20 +02:00

proc_tty.c

Merge tag 'tty-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2017-11-13 21:05:31 -08:00

root.c

Rename superblock flags (MS_xyz -> SB_xyz)

2017-11-27 13:05:09 -08:00

self.c

fs/proc: use __ro_after_init

2018-02-06 18:32:43 -08:00

softirqs.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

stat.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

task_mmu.c

mm: use updated pmdp_invalidate() interface to track dirty/accessed bits

2018-01-31 17:18:38 -08:00

task_nommu.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

thread_self.c

fs/proc: use __ro_after_init

2018-02-06 18:32:43 -08:00

uptime.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

util.c

proc: use do-while in name_to_int()

2017-11-17 16:10:00 -08:00

version.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vmcore.c

fs/proc/vmcore.c: simpler /proc/vmcore cleanup

2018-02-06 18:32:43 -08:00