From: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> stable inclusion from stable-v6.6.118 commit e2a897ad5f538d314955c747a0a2edb184fcdecd category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/11562 CVE: CVE-2025-68218 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... ------------------ [ Upstream commit 6d87cd5335784351280f82c47cc8a657271929c3 ] Blktests test cases nvme/014, 057 and 058 fail occasionally due to a lockdep WARN. As reported in the Closes tag URL, the WARN indicates that a deadlock can happen due to the dependency among disk->open_mutex, kblockd workqueue completion and partition_scan_work completion. To avoid the lockdep WARN and the potential deadlock, cut the dependency by running the partition_scan_work not by kblockd workqueue but by nvme_wq. Reported-by: Yi Zhang <yi.zhang@redhat.com> Closes: https://lore.kernel.org/linux-block/CAHj4cs8mJ+R_GmQm9R8ebResKAWUE8kF5+_WVg0... Link: https://lore.kernel.org/linux-block/oeyzci6ffshpukpfqgztsdeke5ost5hzsuz4rrsj... Fixes: 1f021341eef4 ("nvme-multipath: defer partition scanning") Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Zheng Qixing <zhengqixing@huawei.com> --- drivers/nvme/host/multipath.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 119afdfe4b91..e72c47651ce0 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -684,7 +684,7 @@ static void nvme_mpath_set_live(struct nvme_ns *ns) return; } nvme_add_ns_head_cdev(head); - kblockd_schedule_work(&head->partition_scan_work); + queue_work(nvme_wq, &head->partition_scan_work); } mutex_lock(&head->lock); -- 2.39.2