tcp: Fix data-races around sysctl_tcp_recovery.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Mon, 18 Jul 2022 17:26:46 +0000 (10:26 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 20 Jul 2022 09:14:50 +0000 (10:14 +0100)
commite7d2ef837e14a971a05f60ea08c47f3fed1a36e4
treeb31a9f6cf32b890ab218549be7a0800c59281dbc
parent52e65865deb6a36718a463030500f16530eaab74
tcp: Fix data-races around sysctl_tcp_recovery.

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

Fixes: 4f41b1c58a32 ("tcp: use RACK to detect losses")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_input.c
net/ipv4/tcp_recovery.c