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nvme-multipath: fix leak on try_module_get failure

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We need to fall back to the synchronous removal if we can't get a
reference on the module needed for the deferred removal.

Fixes: 62188639ec ("nvme-multipath: introduce delayed removal of the multipath head node")
Reviewed-by: Nilay Shroff <nilay@linux.ibm.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Keith Busch
2026-02-25 11:38:05 -08:00
parent dd677d0598
commit 0f5197ea9a
1 changed files with 5 additions and 7 deletions
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12
drivers/nvme/host/multipath.c
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@@ -1310,13 +1310,11 @@ void nvme_mpath_remove_disk(struct nvme_ns_head *head)
if (!list_empty(&head->list))
goto out;
if (head->delayed_removal_secs) {
/*
* Ensure that no one could remove this module while the head
* remove work is pending.
*/
if (!try_module_get(THIS_MODULE))
goto out;
/*
* Ensure that no one could remove this module while the head
* remove work is pending.
*/
if (head->delayed_removal_secs && try_module_get(THIS_MODULE)) {
mod_delayed_work(nvme_wq, &head->remove_work,
head->delayed_removal_secs * HZ);
} else {