[PATCH v4 0/2] virtio_ring: check desc == NULL when packed and indirect

Michael S. Tsirkin
2021-10-19T13:23:49Z

On Tue, Oct 19, 2021 at 07:52:33PM +0800, Xuan Zhuo
wrote:
> In the case of packed, use indirect desc, since desc is allocated by
> kmalloc_array(), we should check whether its return value is NULL.
>

a better description here:

fix theoretical issues in virtio_ring (so I'm guessing - or did
you observe any null pointer dereferences?)

> v4:
>    Inside the #2 patch, virtqueue_add_indirect_packed() return -EAGAIN when
>    desc == NULL.
>
> v3:
>     Update commit message of the #1 patch.
>
> v2:
>     Separate the style fix into a single patch.
>
>
> Xuan Zhuo (2):
>   virtio_ring: fix style of virtqueue_add_indirect_packed
>   virtio_ring: check desc == NULL when using indirect with packed
>
>  drivers/virtio/virtio_ring.c | 25 ++++++++++++++++---------
>  1 file changed, 16 insertions(+), 9 deletions(-)
>
> --
> 2.31.0