[PATCH] debugfs inode leak

Looking at the reiser4 crash, I found a leak in debugfs. In
debugfs_mknod(), we create the inode before checking if the dentry
already has one attached. We don't free it if that is the case.

These bugs happen quite often, I'm starting to think we should disallow
such coding in CodingStyle.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 85d166cdcae4..b55b4ea9a676 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -67,12 +67,13 @@ static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t d
 static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
                          int mode, dev_t dev)
 {
-        struct inode *inode = debugfs_get_inode(dir->i_sb, mode, dev);
+        struct inode *inode;
         int error = -EPERM;
 
         if (dentry->d_inode)
                 return -EEXIST;
 
+        inode = debugfs_get_inode(dir->i_sb, mode, dev);
         if (inode) {
                 d_instantiate(dentry, inode);
                 dget(dentry);