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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: devel-bounces@openvz.org Errors-To: devel-bounces@openvz.org -- Best regards, Konstantin Khorenko, Virtuozzo Linux Kernel Team On 10/28/26 09:14, Alexander Ivanov wrote: > The second > submission also overwrites bio[], bio_nr and the iovecs of bios that > are still in flight. It also frees the bounce buffer and bio[] of the first submission under bios that are still in flight, so this is a use-after-free, not only a counter leak. Worth a sentence here. > + if (unlikely(req->inflight)) > + return -EBUSY; Please add a vhostblk_vq_err() here naming the head. Now the host log only shows the caller's generic "Failed to process guest request" with -16. A separate ticket, not for this patch: vhost_blk_req_done() ignores a failed vhost_vq_work_queue(). After vhost_worker_killed() (QEMU SIGKILLed with bios in flight) vq->worker is NULL, the completion is lost, forget_request() never runs and release hangs in vhost_blk_flush() the same way. Please file a ticket an post it here for the reference. Reviewed-by: Konstantin Khorenko -- Best regards, Konstantin Khorenko, Virtuozzo Linux Kernel Team _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel