diff options
| -rw-r--r-- | drivers/block/nbd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index b53fdb0a282..60cc54368b6 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -153,6 +153,12 @@ static int sock_xmit(struct nbd_device *lo, int send, void *buf, int size, struct kvec iov; sigset_t blocked, oldset; + if (unlikely(!sock)) { + printk(KERN_ERR "%s: Attempted %s on closed socket in sock_xmit\n", + lo->disk->disk_name, (send ? "send" : "recv")); + return -EINVAL; + } + /* Allow interception of SIGKILL only * Don't allow other signals to interrupt the transmission */ siginitsetinv(&blocked, sigmask(SIGKILL)); |