[PATCH 4/4] reiser4: fixed null pointer dereference

[Johannes Buchner]

The parameter wbc=NULL caused a NULL pointer dereference in
reiser4_sync_inodes.
This issue was introduced in patch reiser4-vfs-add-super_operationssync_inodes
---
 fs/reiser4/super_ops.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/reiser4/super_ops.c b/fs/reiser4/super_ops.c
index 0c09e3e..f72d42a 100644
--- a/fs/reiser4/super_ops.c
+++ b/fs/reiser4/super_ops.c
@@ -395,7 +395,7 @@ static void reiser4_sync_inodes(struct super_block *super,
 	reiser4_context *ctx;
 	long to_write;
 
-	if (wbc->for_kupdate)
+	if (wbc == NULL || wbc->for_kupdate)
 		/* reiser4 has its own means of periodical write-out */
 		return;
 
-- 
1.6.4.4

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