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fs: dlm: drop lkb ref in bug case

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This patch will drop the lkb reference in an very unlikely case which
should in practice not happened. However if it happens we cleanup the
reference just in case.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring
2022-11-17 17:11:41 -05:00
committed by David Teigland
parent f217d7ccb9
commit 9267c85769
1 changed files with 2 additions and 1 deletions
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3
fs/dlm/ast.c
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@ -186,7 +186,7 @@ void dlm_callback_work(struct work_struct *work)
spin_unlock(&lkb->lkb_cb_lock);
if (WARN_ON(rv == DLM_DEQUEUE_CALLBACK_EMPTY))
return;
goto out;
for (;;) {
castfn = lkb->lkb_astfn;
@ -217,6 +217,7 @@ void dlm_callback_work(struct work_struct *work)
spin_unlock(&lkb->lkb_cb_lock);
}
out:
/* undo kref_get from dlm_add_callback, may cause lkb to be freed */
dlm_put_lkb(lkb);
}