Re: [PATCH net] vhost_net: validate sock before trying to put its fd

From: Jason Wang <redacted>
Date: Thu, 21 Jun 2018 13:11:31 +0800

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 <redacted>
Signed-off-by: Jason Wang <redacted>

Applied and queued up for -stable, thanks Jason.