diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-08-23 20:46:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-05 11:26:30 +0300 |
| commit | da89cab514b3ec7fdedb378617160c47fe3b60a9 (patch) | |
| tree | bdab3c6d72572fc57f978ec30ea8593d5c24a9d8 /include | |
| parent | 04ec1e942cff42fecdde5ee30f42fc28b822379b (diff) | |
| download | linux-da89cab514b3ec7fdedb378617160c47fe3b60a9.tar.xz | |
net: Fix a data-race around sysctl_net_busy_poll.
[ Upstream commit c42b7cddea47503411bfb5f2f93a4154aaffa2d9 ]
While reading sysctl_net_busy_poll, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.
Fixes: 060212928670 ("net: add low latency socket poll")
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 'include')
| -rw-r--r-- | include/net/busy_poll.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h index c76a5e9894da..8f42f6f3af86 100644 --- a/include/net/busy_poll.h +++ b/include/net/busy_poll.h @@ -43,7 +43,7 @@ extern unsigned int sysctl_net_busy_poll __read_mostly; static inline bool net_busy_loop_on(void) { - return sysctl_net_busy_poll; + return READ_ONCE(sysctl_net_busy_poll); } static inline bool sk_can_busy_loop(const struct sock *sk) |