tcp: Fix a data-race around sysctl_tcp_tso_rtt_log.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Wed, 20 Jul 2022 16:50:23 +0000 (09:50 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 22 Jul 2022 11:06:17 +0000 (12:06 +0100)
commit2455e61b85e9c99af38cd889a7101f1d48b33cb4
tree443f16d5217aca317b8ccf5035d62a76d27459d0
parente0bb4ab9dfddd872622239f49fb2bd403b70853b
tcp: Fix a data-race around sysctl_tcp_tso_rtt_log.

While reading sysctl_tcp_tso_rtt_log, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 65466904b015 ("tcp: adjust TSO packet sizes based on min_rtt")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_output.c