diff options
| author | Jason Wang <jasowang@redhat.com> | 2018-06-21 13:11:31 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-23 10:23:49 +0900 |
| commit | b8f1f65882f07913157c44673af7ec0b308d03eb (patch) | |
| tree | 106b3508db9867582594c1f7d7e740afd350c6be | |
| parent | e5ab564c9ebee77794842ca7d7476147b83d6a27 (diff) | |
vhost_net: validate sock before trying to put its fd
Sock will be NULL if we pass -1 to vhost_net_set_backend(), but when
we meet errors during ubuf allocation, the code does not check for
NULL before calling sockfd_put(), this will lead NULL
dereferencing. Fixing by checking sock pointer before.
Fixes: bab632d69ee4 ("vhost: vhost TX zero-copy support")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/vhost/net.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 686dc670fd29..29756d88799b 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1226,7 +1226,8 @@ err_used: if (ubufs) vhost_net_ubuf_put_wait_and_free(ubufs); err_ubufs: - sockfd_put(sock); + if (sock) + sockfd_put(sock); err_vq: mutex_unlock(&vq->mutex); err: |