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authorKuniyuki Iwashima2022-08-23 10:46:51 -0700
committerDavid S. Miller2022-08-24 13:46:58 +0100
commitc42b7cddea47503411bfb5f2f93a4154aaffa2d9 (patch)
tree92155026458b74f8e5ded8b63b4fa4df36cdee42 /include/net
parentd2154b0afa73c0159b2856f875c6b4fe7cf6a95e (diff)
net: Fix a data-race around sysctl_net_busy_poll.
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>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/busy_poll.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index c4898fcbf923..f90f0021f5f2 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -33,7 +33,7 @@ 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)