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authorEiichi Tsukata <eiichi.tsukata@nutanix.com>2021-11-09 03:15:02 +0300
committerDavid S. Miller <davem@davemloft.net>2021-11-10 17:36:11 +0300
commitc7cd82b90599fa10915f41e3dd9098a77d0aa7b6 (patch)
treeea5e3eb16b2a08584569f0c61e9e5ddac06fb301 /net/vmw_vsock
parentbb7bbb6e36474933540c24ae1f1ad651b843981f (diff)
downloadlinux-c7cd82b90599fa10915f41e3dd9098a77d0aa7b6.tar.xz
vsock: prevent unnecessary refcnt inc for nonblocking connect
Currently vosck_connect() increments sock refcount for nonblocking socket each time it's called, which can lead to memory leak if it's called multiple times because connect timeout function decrements sock refcount only once. Fixes it by making vsock_connect() return -EALREADY immediately when sock state is already SS_CONNECTING. Fixes: d021c344051a ("VSOCK: Introduce VM Sockets") Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Eiichi Tsukata <eiichi.tsukata@nutanix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/vmw_vsock')
-rw-r--r--net/vmw_vsock/af_vsock.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 7d851eb3a683..ed0df839c38c 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1322,6 +1322,8 @@ static int vsock_connect(struct socket *sock, struct sockaddr *addr,
* non-blocking call.
*/
err = -EALREADY;
+ if (flags & O_NONBLOCK)
+ goto out;
break;
default:
if ((sk->sk_state == TCP_LISTEN) ||