linux-kernel - [PATCH] vfs: initialize d_iname to null for long file names

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Message-ID: <20081126134105.GA25795@localhost>
Date:	Wed, 26 Nov 2008 21:41:05 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Eric Van Hensbergen <ericvh@...il.com>,
	Latchesar Ionkov <lucho@...kov.net>,
	v9fs-developer@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: [PATCH] vfs: initialize d_iname to null for long file names

dentry->d_iname is currently uninitialized for long file names.  Init
it to null string to avoid bad behaviors on careless references to it.

Signed-off-by: Wu Fengguang <wfg@...ux.intel.com>
---
diff --git a/fs/dcache.c b/fs/dcache.c
index a1d86c7..29d1768 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -929,6 +929,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
 			kmem_cache_free(dentry_cache, dentry); 
 			return NULL;
 		}
+		dentry->d_iname[0] = '\0';
 	} else  {
 		dname = dentry->d_iname;
 	}	
--
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