From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Thu, 10 Jan 2008 00:07:29 +0000 (-0500)
Subject: Unionfs: ensure we have lower dentries in d_iput
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=e38601898905343b8923013c97b58b873e90e5ab;p=unionfs-lite.git

Unionfs: ensure we have lower dentries in d_iput

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---

diff --git a/fs/unionfs/dentry.c b/fs/unionfs/dentry.c
index d9696409ea2..cd15243f045 100644
--- a/fs/unionfs/dentry.c
+++ b/fs/unionfs/dentry.c
@@ -507,9 +507,10 @@ static void unionfs_d_iput(struct dentry *dentry, struct inode *inode)
 {
 	int bindex, rc;
 
+	BUG_ON(!dentry);
 	unionfs_read_lock(dentry->d_sb, UNIONFS_SMUTEX_CHILD);
 
-	if (dbstart(dentry) < 0)
+	if (!UNIONFS_D(dentry) || dbstart(dentry) < 0)
 		goto drop_lower_inodes;
 	for (bindex = dbstart(dentry); bindex <= dbend(dentry); bindex++) {
 		if (unionfs_lower_mnt_idx(dentry, bindex)) {