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| author | Danilo Krummrich <danilokrummrich@dk-develop.de> | 2018-04-11 02:31:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-30 08:52:23 +0300 |
| commit | 9c9844d9c9d042df472dddae5a042d963cfc603f (patch) | |
| tree | 035d572d090f51752e55051cb0736847661ed0b0 /mm/swapfile.c | |
| parent | 59bdc587231c5d468f76978c0cd9512740115722 (diff) | |
| download | linux-9c9844d9c9d042df472dddae5a042d963cfc603f.tar.xz | |
fs/proc/proc_sysctl.c: fix potential page fault while unregistering sysctl table
[ Upstream commit a0b0d1c345d0317efe594df268feb5ccc99f651e ]
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: 0e47c99d7fe25 ("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>
Diffstat (limited to 'mm/swapfile.c')
0 files changed, 0 insertions, 0 deletions