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authorKuniyuki Iwashima <kuniyu@amazon.com>2022-07-18 10:26:52 -0700
committerDavid S. Miller <davem@davemloft.net>2022-07-20 10:14:50 +0100
commit2d17d9c7382327d00aeaea35af44e9b26d53206e (patch)
treec54c45aba10d825cac35b651fa0437b9cdcf9684 /net/ipv4/tcp_minisocks.c
parent0b484c91911e758e53656d570de58c2ed81ec6f2 (diff)
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tcp: Fix a data-race around sysctl_tcp_abort_on_overflow.
While reading sysctl_tcp_abort_on_overflow, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
-rw-r--r--net/ipv4/tcp_minisocks.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 700ea548d125..cb95d88497ae 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -781,7 +781,7 @@ listen_overflow:
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;
}