From: Cong Wang <xiyou.wangc...@gmail.com>
Date: Sun, 30 Dec 2018 12:43:42 -0800
> __ptr_ring_swap_queue() tries to move pointers from the old
> ring to the new one, but it forgets to check if ->producer
> is beyond the new size at the end of the operation. This leads
> to an out-of-bound access in __ptr_ring_produce() as reported
> by syzbot.
>
> Reported-by: syzbot+8993c0fa96d57c399...@syzkaller.appspotmail.com
> Fixes: 5d49de532002 ("ptr_ring: resize support")
> Cc: "Michael S. Tsirkin" <m...@redhat.com>
> Cc: John Fastabend <john.fastab...@gmail.com>
> Cc: Jason Wang <jasow...@redhat.com>
> Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
Applied and queued up for -stable.
