vhost_net: validate sock before trying to put its fd
[ Upstream commitpull/10/headb8f1f65882
] 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:bab632d69e
("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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
2dc4696ee6
commit
7eba6537c3
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@ -1186,6 +1186,7 @@ err_used:
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if (ubufs)
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vhost_net_ubuf_put_wait_and_free(ubufs);
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err_ubufs:
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if (sock)
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sockfd_put(sock);
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err_vq:
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mutex_unlock(&vq->mutex);
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