diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-08-23 10:47:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-05 10:27:42 +0200 |
| commit | aa0a3f72c6daef101d151ecc6dc85202b2a94a91 (patch) | |
| tree | 877a8281c70c5e18ffe778b78eeacbd504692b3a /net/socket.c | |
| parent | 923fa41adebdad77b25882a8b3882ef8cc237d4c (diff) | |
net: Fix a data-race around sysctl_somaxconn.
[ Upstream commit 3c9ba81d72047f2e81bb535d42856517b613aba7 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/socket.c')
| -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 94358566c9d1..02feaf5bd84a 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1661,7 +1661,7 @@ 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; |