From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Fri, 19 Sep 2008 03:13:24 +0000 (-0400)
Subject: Unionfs: unionfs_permission locking fixes
X-Git-Tag: unionfs-2.5~1
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=bf92b497b5fb40b1d919617769595ab2fc778805;p=unionfs-2.6.24.y.git

Unionfs: unionfs_permission locking fixes

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

diff --git a/fs/unionfs/inode.c b/fs/unionfs/inode.c
index d08c2aa7ba1..e43d4562a3a 100644
--- a/fs/unionfs/inode.c
+++ b/fs/unionfs/inode.c
@@ -789,6 +789,7 @@ static int unionfs_permission(struct inode *inode, int mask,
 	int bindex, bstart, bend;
 	const int is_file = !S_ISDIR(inode->i_mode);
 	const int write_mask = (mask & MAY_WRITE) && !(mask & MAY_READ);
+	struct inode *inode_grabbed = igrab(inode);
 
 	if (nd)
 		unionfs_lock_dentry(nd->dentry, UNIONFS_DMUTEX_CHILD);
@@ -869,6 +870,7 @@ out:
 	unionfs_check_nd(nd);
 	if (nd)
 		unionfs_unlock_dentry(nd->dentry);
+	iput(inode_grabbed);
 	return err;
 }