On Thu, Sep 27, 2018 at 08:22:04PM +0800, Jason Wang wrote:
> The access of vsock is not protected by vhost_vsock_lock. This may
> lead to use after free since vhost_vsock_dev_release() may free the
> pointer at the same time.
>
> Fix this by holding the lock during the access.
>
> Reported-by: syzbot+e3e074963495f92a89ed@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: 16320f363ae1 ("vhost-vsock: add pkt cancel capability")
> Fixes: 433fc58e6bf2 ("VSOCK: Introduce vhost_vsock.ko")
> Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
> ---
> - V2: fix typos
> - The patch is needed for -stable.
> ---
> drivers/vhost/vsock.c | 26 +++++++++++++++++++-------
> 1 file changed, 19 insertions(+), 7 deletions(-)
Thank you, Jason!
Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
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