[PATCH] nvme-tcp: Check if request has started before processing it

[Hannes Reinecke]

On 2/12/21 7:17 PM, Daniel Wagner wrote:
> blk_mq_tag_to_rq() will always return a request if the command_id is
> in the valid range. Check if the request has been started. If we
> blindly process the request we might double complete a request which
> can be fatal.
> 
> Signed-off-by: Daniel Wagner <dwagner at suse.de>
> ---
> 
> This patch is against nvme-5.12.
> 
> There is one blk_mq_tag_to_rq() in nvme_tcp_recv_ddgst() which I
> didn't update as I am not sure if it's also needed.
> 
I guess it is; this patch is essentially a protection against invalid 
frames, and as such affects all places.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare at suse.de                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer