diff options
| author | Dmitry Safonov <dima@arista.com> | 2022-11-23 17:38:58 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-12-01 15:53:05 -0800 |
| commit | b389d1affc2cc2dc8686cdab303a30b2ad3a81d4 (patch) | |
| tree | d41aacb33a99106cf3d2578d92b8e2c68ea88bca /net/ipv4 | |
| parent | 459837b522f7dff3b6681f534d8fff4eca19b7d1 (diff) | |
| download | linux-b389d1affc2cc2dc8686cdab303a30b2ad3a81d4.tar.bz2 | |
net/tcp: Do cleanup on tcp_md5_key_copy() failure
If the kernel was short on (atomic) memory and failed to allocate it -
don't proceed to creation of request socket. Otherwise the socket would
be unsigned and userspace likely doesn't expect that the TCP is not
MD5-signed anymore.
Signed-off-by: Dmitry Safonov <dima@arista.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 5d83a332f1dd..7fae586405cf 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1619,13 +1619,8 @@ struct sock *tcp_v4_syn_recv_sock(const struct sock *sk, struct sk_buff *skb, addr = (union tcp_md5_addr *)&newinet->inet_daddr; key = tcp_md5_do_lookup(sk, l3index, addr, AF_INET); if (key) { - /* - * We're using one, so create a matching key - * on the newsk structure. If we fail to get - * memory, then we end up not copying the key - * across. Shucks. - */ - tcp_md5_key_copy(newsk, addr, AF_INET, 32, l3index, key); + if (tcp_md5_key_copy(newsk, addr, AF_INET, 32, l3index, key)) + goto put_and_exit; sk_gso_disable(newsk); } #endif |