tree b84991ab1802d433c2b7666dbf64dc093df15f85
parent e0cfa0d3e53b6e4f2fd4280b2f9474e6fb8e13f4
author Jason Wang <jasowang@redhat.com> 1522051823 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1523641716 +0200

vhost_net: add missing lock nesting notation


[ Upstream commit aaa3149bbee9ba9b4e6f0bd6e3e7d191edeae942 ]

We try to hold TX virtqueue mutex in vhost_net_rx_peek_head_len()
after RX virtqueue mutex is held in handle_rx(). This requires an
appropriate lock nesting notation to calm down deadlock detector.

Fixes: 0308813724606 ("vhost_net: basic polling support")
Reported-by: syzbot+7f073540b1384a614e09@syzkaller.appspotmail.com
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>