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authorKuniyuki Iwashima <kuniyu@amazon.com>2022-08-23 10:47:00 -0700
committerDavid S. Miller <davem@davemloft.net>2022-08-24 13:46:58 +0100
commit3c9ba81d72047f2e81bb535d42856517b613aba7 (patch)
tree7ec90a2dd4a26d38004c039257620480dc404d31 /net/socket.c
parent05e49cfc89e4f325eebbc62d24dd122e55f94c23 (diff)
net: Fix a data-race around sysctl_somaxconn.
While reading sysctl_somaxconn, 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/socket.c')
-rw-r--r--net/socket.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c
index 9b27c5e4e5ba..7378375d3a5b 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1801,7 +1801,7 @@ int __sys_listen(int fd, int backlog)
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (sock) {
- somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
+ somaxconn = READ_ONCE(sock_net(sock->sk)->core.sysctl_somaxconn);
if ((unsigned int)backlog > somaxconn)
backlog = somaxconn;