[PATCH 1/9] coda: Avoid NULL pointer dereference from a bad inode

[Jan Harkes <jaharkes@xxxxxxxxxx>]

Avoid accessing coda_inode_info from a dentry with a bad inode.

Signed-off-by: Jan Harkes <jaharkes@xxxxxxxxxx>
---
 fs/coda/dir.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index d69989c1bac3..3fd085009f26 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -499,15 +499,20 @@ static int coda_dentry_revalidate(struct dentry *de, unsigned int flags)
  */
 static int coda_dentry_delete(const struct dentry * dentry)
 {
-	int flags;
+	struct inode *inode;
+	struct coda_inode_info *cii;
 
 	if (d_really_is_negative(dentry)) 
 		return 0;
 
-	flags = (ITOC(d_inode(dentry))->c_flags) & C_PURGE;
-	if (is_bad_inode(d_inode(dentry)) || flags) {
+	inode = d_inode(dentry);
+	if (!inode || is_bad_inode(inode))
 		return 1;
-	}
+
+	cii = ITOC(inode);
+	if (cii->c_flags & C_PURGE)
+		return 1;
+
 	return 0;
 }
 
-- 
2.25.1