diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-11 17:15:19 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-21 21:24:26 +0200 |
| commit | e58b02e445463065b4078bf621561da75197853f (patch) | |
| tree | 08e3fff7c5e01db74e4363d292844a359f09f103 /drivers/fpga/fpga-mgr.c | |
| parent | 3852f048be6017c89bcd9b5fc69cba540e9bfd75 (diff) | |
sysctl: Fix data-races in proc_dou8vec_minmax().
[ Upstream commit 7dee5d7747a69aa2be41f04c6a7ecfe3ac8cdf18 ]
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: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions