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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-08-23 19:47:00 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-08-24 14:46:58 +0200 |
| commit | 3c9ba81d72047f2e81bb535d42856517b613aba7 (patch) | |
| tree | 7ec90a2dd4a26d38004c039257620480dc404d31 | |
| parent | net: Fix a data-race around netdev_unregister_timeout_secs. (diff) | |
| download | linux-3c9ba81d72047f2e81bb535d42856517b613aba7.tar.xz linux-3c9ba81d72047f2e81bb535d42856517b613aba7.zip | |
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>
| -rw-r--r-- | net/socket.c | 2 |
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; |