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a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=RD47p0oAkeU5bO7t-o6f:22 a=VwQbUJbxAAAA:8 a=yPCof4ZbAAAA:8 a=i6kypgwOvDI-zuPmVgMA:9 a=QEXdDO2ut3YA:10 a=5yU3S35YU4bGjq-dph-N:22 a=Bho9c0fBagfJEIQBS7DQ:22 cc=ntf awl=host:12222 On 03/07/2026 12:26, sashiko-bot@kernel.org wrote: > Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider: > - [High] Destroying the bio pool before draining inflight IOs during teardown leads to memory corruption. > - [High] Manual cleanup on the dev_set_name() error path after put_device() causes deterministic double-free and use-after-free vulnerabilities. > -- > > commit 31da3ef05c72ae055a7ebbed278c14967c624ea3 > Author: John Garry > > scsi-multipath: clone each bio > > For failover handling, we will take the approach to resubmit each > bio. Unlike NVMe, for SCSI there is no guarantee that any bio submitted > is either all or none completed. As such, for failover handling clone > and submit each bio. > >> diff --git a/drivers/scsi/scsi_multipath.c b/drivers/scsi/scsi_multipath.c >> index 6159803d4cbb8..ca4ab720c19af 100644 >> --- a/drivers/scsi/scsi_multipath.c >> +++ b/drivers/scsi/scsi_multipath.c >> @@ -96,6 +96,7 @@ static void scsi_mpath_head_release(struct device *dev) >> container_of(dev, struct scsi_mpath_head, dev); >> struct mpath_head *mpath_head = &scsi_mpath_head->mpath_head; >> >> + bioset_exit(&scsi_mpath_head->bio_pool); > [Severity: High] > Does destroying the bio pool here before draining inflight IOs lead to memory > corruption? > > If a device is removed, the final reference to the scsi_mpath_head might be > dropped before the underlying request queue is frozen. We remove the gendisk in sd_mpath_remove(), and this must be done prior to tidying up the scsi_mpath_head. > Because the queue is > not yet drained, inflight cloned bios can still complete after the pool is > destroyed. When they do, scsi_mpath_clone_end_io() calls bio_put(), which > will attempt to return the clone to this destroyed bio_pool, causing a > use-after-free. > >> ida_free(&scsi_multipath_dev_ida, scsi_mpath_head->index); >> mpath_head_uninit(mpath_head);