[Devel] [PATCH hci-8.1 2/3] drivers/vhost/blk: take virtio_blk_outhdr only from the readable part

[no-reply at sashiko.virtuozzo.com]

> The request header was moved from the whole descriptor chain, so a
> chain with no readable part, or one shorter than the header, had header
> bytes read from buffers the guest marked device-writable. Those bytes
> were also trimmed in place from the writable segments, shifting the
> status byte and the READ/GET_ID payload taken from them.
> 
> Take the header only from the readable part. When that part is shorter
> than struct virtio_blk_outhdr, drop the request and report it through
> error_ctx, like the other malformed-header paths do.
> 
> https://virtuozzo.atlassian.net/browse/VSTOR-142755
> Fixes: 1629db092dd7 ("drivers/vhost: vhost-blk accelerator for virtio-blk guests")
> Feature: vhost-blk: in-kernel accelerator for virtio-blk guests
> Signed-off-by: Alexander Ivanov <alexander.ivanov at virtuozzo.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261021084610.1476738-1-alexander.ivanov@virtuozzo.com?part=2