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From: Dan Carpenter <>
Subject: [Ocfs2-devel] [patch v2] ocfs2: fix recent memory corruption bug
Date: Thu, 1 Aug 2013 17:02:59 +0300	[thread overview]
Message-ID: <20130801140259.GA18952@elgon.mountain> (raw)
In-Reply-To: <20130801135830.GA5102@mwanda>

The pointer math in 6fdf3af1d2 "ocfs2: fix null pointer dereference in
ocfs2_dir_foreach_blk_id()" isn't correct so it will zero out the wrong
memory.  In fact, the memset isn't needed because the initializer will
set all these values to zero.

Signed-off-by: Dan Carpenter <>
v2: remove the memset

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index c91d986..b1748cd 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -2157,9 +2157,6 @@ int ocfs2_empty_dir(struct inode *inode)
 		.ctx.pos = 0,
-	memset(&priv + sizeof(struct dir_context), 0,
-	       sizeof(priv) - sizeof(struct dir_context));
 	if (ocfs2_dir_indexed(inode)) {
 		ret = ocfs2_empty_dir_dx(inode, &priv);
 		if (ret)

  reply	other threads:[~2013-08-01 14:02 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-01 13:55 [Ocfs2-devel] [patch] ocfs2: fix recent memory corruption bug Dan Carpenter
2013-08-01 13:58 ` Dan Carpenter
2013-08-01 14:02   ` Dan Carpenter [this message]
2013-08-01 14:11     ` [Ocfs2-devel] [patch v2] " Jeff Liu
2013-08-01 15:36       ` [Ocfs2-devel] [patch v3] ocfs2: " Dan Carpenter
2013-08-02  1:39         ` Jeff Liu

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