On Sun, 22 May 2022 20:23:50 +0800, Ming Lei wrote:
> blk_mq_run_hw_queues() could be run when there isn't queued request and
> after queue is cleaned up, at that time tagset is freed, because tagset
> lifetime is covered by driver, and often freed after blk_cleanup_queue()
> returns.
>
> So don't touch ->tagset for figuring out current default hctx by the mapping
> built in request queue, so use-after-free on tagset can be avoided. Meantime
> this way should be fast than retrieving mapping from tagset.
>
> [...]
Applied, thanks!
[1/1] blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx
commit: 5d05426e2d5fd7df8afc866b78c36b37b00188b7
Best regards,
--
Jens Axboe
