On Mon, Sep 13, 2021 at 01:53:45PM +0800, Jason Wang wrote: > If an untrusted device neogitates BLK_F_MQ but advertises a zero > num_queues, the driver may end up trying to allocating zero size > buffers where ZERO_SIZE_PTR is returned which may pass the checking > against the NULL. This will lead unexpected results. > > Fixing this by using single queue if num_queues is zero. > > Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> > Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxx> > Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx> > --- > drivers/block/virtio_blk.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
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