linux-ext4 - [PATCH] fs/ext3: set pointer = NULL, after kfree it

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Message-ID: <50D7EEF6.4070005@asianux.com>
Date:	Mon, 24 Dec 2012 13:58:14 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	jack@...e.cz, akpm@...ux-foundation.org
CC:	linux-ext4@...r.kernel.org
Subject: [PATCH] fs/ext3: set pointer = NULL, after kfree it


  set s->base = NULL, after kfree it.

Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 fs/ext3/xattr.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index d22ebb7..57aab94 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -847,8 +847,10 @@ cleanup:
 	if (ce)
 		mb_cache_entry_release(ce);
 	brelse(new_bh);
-	if (!(bs->bh && s->base == bs->bh->b_data))
+	if (!(bs->bh && s->base == bs->bh->b_data)) {
 		kfree(s->base);
+		s->base = NULL;
+	}
 
 	return error;
 
-- 
1.7.10.4
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