Commit c42b7cdd authored by Kuniyuki Iwashima's avatar Kuniyuki Iwashima Committed by David S. Miller
Browse files

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: 06021292 ("net: add low latency socket poll")
Signed-off-by: default avatarKuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d2154b0a

include/net/busy_poll.h

+1 −1
Original line number Diff line number Diff line
@@ -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)