Danilo Krummrich ea8a1f4a9a 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 07:49:07 +02:00

..

array.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-02-25 12:01:16 -08:00

base.c

proc: fix /proc/*/map_files lookup

2018-05-30 07:48:56 +02:00

cmdline.c

…

consoles.c

…

cpuinfo.c

…

devices.c

…

fd.c

proc: actually make proc_fd_permission() thread-friendly

2015-11-06 17:50:42 -08:00

fd.h

…

generic.c

proc: Fix unbalanced hard link numbers

2017-05-25 14:30:10 +02:00

inode.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2015-07-03 15:20:57 -07:00

internal.h

proc: Allow creating permanently empty directories that serve as mount points

2015-07-01 10:36:41 -05:00

interrupts.c

…

Kconfig

fs, proc: add help for CONFIG_PROC_CHILDREN

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

kcore.c

x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86

2015-07-18 03:42:51 +02:00

kmsg.c

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loadavg.c

…

Makefile

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meminfo.c

proc: meminfo: estimate available memory more conservatively

2018-05-26 08:48:54 +02:00

namespaces.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-02-25 12:01:16 -08:00

nommu.c

vfs: add seq_file_path() helper

2015-06-23 18:01:07 -04:00

page.c

proc: add cond_resched to /proc/kpage* read/write loop

2015-09-10 13:29:01 -07:00

proc_net.c

VFS: normal filesystems (and lustre): d_inode() annotations

2015-04-15 15:06:57 -04:00

proc_sysctl.c

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

2018-05-30 07:49:07 +02:00

proc_tty.c

tty fix oops when rmmod 8250

2017-12-20 10:05:00 +01:00

root.c

proc: prevent stacking filesystems on top

2016-06-24 10:18:20 -07:00

self.c

don't pass nameidata to ->follow_link()

2015-05-10 22:20:15 -04:00

softirqs.c

…

stat.c

…

task_mmu.c

fs/proc: Stop trying to report thread stacks

2018-04-08 11:52:00 +02:00

task_nommu.c

fs/proc: Stop trying to report thread stacks

2018-04-08 11:52:00 +02:00

thread_self.c

don't pass nameidata to ->follow_link()

2015-05-10 22:20:15 -04:00

uptime.c

…

version.c

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vmcore.c

vmcore: fix PT_NOTE n_namesz, n_descsz overflow issue

2015-02-17 14:34:52 -08:00