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tcp: Fix a data-race around sysctl_tcp_abort_on_overflow.

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

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kuniyuki Iwashima 2022-07-18 10:26:52 -07:00 committed by David S. Miller
parent 0b484c9191
commit 2d17d9c738
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/tcp_minisocks.c
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@ -781,7 +781,7 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
if (sk != req->rsk_listener)
__NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMIGRATEREQFAILURE);
if (!sock_net(sk)->ipv4.sysctl_tcp_abort_on_overflow) {
if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_abort_on_overflow)) {
inet_rsk(req)->acked = 1;
return NULL;
}