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| author | Jason Wang <jasowang@redhat.com> | 2018-03-27 20:50:52 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 19:50:25 +0200 |
| commit | 0445d2c3f6a5680cf947d24ba8e8ef849557f670 (patch) | |
| tree | bf4d5fd7613374132666159ed0cc8daecb0707e2 /net/8021q/vlan_dev.c | |
| parent | cc74c7bd24fc9e03623326862c9f063717241124 (diff) | |
vhost: correctly remove wait queue during poll failure
[ Upstream commit dc6455a71c7fc5117977e197f67f71b49f27baba ]
We tried to remove vq poll from wait queue, but do not check whether
or not it was in a list before. This will lead double free. Fixing
this by switching to use vhost_poll_stop() which zeros poll->wqh after
removing poll from waitqueue to make sure it won't be freed twice.
Cc: Darren Kenny <darren.kenny@oracle.com>
Reported-by: syzbot+c0272972b01b872e604a@syzkaller.appspotmail.com
Fixes: 2b8b328b61c79 ("vhost_net: handle polling errors when setting backend")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.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>
Diffstat (limited to 'net/8021q/vlan_dev.c')
0 files changed, 0 insertions, 0 deletions