[Ocfs2-devel] [PATCH 1/4] ocfs2: Fix freeing uninitialized resource on ocfs2_dlm_shutdown

[Heming Zhao]

On local mount mode, there is no dlm resource initalized. If
ocfs2_mount_volume() fails in ocfs2_find_slot(), error handling
flow will call ocfs2_dlm_shutdown(), then does dlm resource
cleanup job, which will trigger kernel crash.

Fixes: 0737e01de9c4 ("ocfs2: ocfs2_mount_volume does cleanup job before
return error")
Signed-off-by: Heming Zhao <heming.zhao at suse.com>
---
 fs/ocfs2/dlmglue.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 801e60bab955..1438ac14940b 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3385,6 +3385,9 @@ int ocfs2_dlm_init(struct ocfs2_super *osb)
 void ocfs2_dlm_shutdown(struct ocfs2_super *osb,
 			int hangup_pending)
 {
+	if (ocfs2_mount_local(osb))
+		return;
+
 	ocfs2_drop_osb_locks(osb);
 
 	/*
-- 
2.37.1