tcp: Fix a data-race around sysctl_tcp_mtu_probe_floor.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Wed, 13 Jul 2022 20:52:03 +0000 (13:52 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 15 Jul 2022 10:49:56 +0000 (11:49 +0100)
commit8e92d4423615a5257d0d871fc067aa561f597deb
tree231eaa5ebc1706e51ccb190dd86949429c316267
parent78eb166cdefcc3221c8c7c1e2d514e91a2eb5014
tcp: Fix a data-race around sysctl_tcp_mtu_probe_floor.

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

Fixes: c04b79b6cfd7 ("tcp: add new tcp_mtu_probe_floor sysctl")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_timer.c