tcp: Fix data-races around sysctl_tcp_dsack.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Wed, 20 Jul 2022 16:50:12 +0000 (09:50 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 22 Jul 2022 11:06:17 +0000 (12:06 +0100)
commit58ebb1c8b35a8ef38cd6927431e0fa7b173a632d
tree479c30127582dd1d9bc12c59874804aec0d6eef1
parentebbbe23fdf6070e31509638df3321688358cc211
tcp: Fix data-races around sysctl_tcp_dsack.

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

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_input.c