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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-11 17:15:19 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-20 12:10:29 +0200 |
| commit | f177b382c33900d0e5a9766493c11a1074076f78 (patch) | |
| tree | 3d9b8afc4aeeb1c6d5d49a3fc7b9f4e4b2e65479 /Makefile | |
| parent | 56314b90fd43bd2444942bc14a7c5c768ce8ec57 (diff) | |
| download | linux-f177b382c33900d0e5a9766493c11a1074076f78.tar.gz linux-f177b382c33900d0e5a9766493c11a1074076f78.tar.bz2 linux-f177b382c33900d0e5a9766493c11a1074076f78.zip | |
sysctl: Fix data-races in proc_dou8vec_minmax().
commit 7dee5d7747a69aa2be41f04c6a7ecfe3ac8cdf18 upstream.
A sysctl variable is accessed concurrently, and there is always a chance
of data-race. So, all readers and writers need some basic protection to
avoid load/store-tearing.
This patch changes proc_dou8vec_minmax() to use READ_ONCE() and
WRITE_ONCE() internally to fix data-races on the sysctl side. For now,
proc_dou8vec_minmax() itself is tolerant to a data-race, but we still
need to add annotations on the other subsystem's side.
Fixes: cb9444130662 ("sysctl: add proc_dou8vec_minmax()")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions