linux-kernel - [012/117] flex_array: fix the panic when calling flex_array_alloc() without __GFP

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Message-Id: <20100510223318.269846445@kvm.kroah.org>
Date:	Mon, 10 May 2010 15:31:43 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Changli Gao <xiaosuo@...il.com>,
	Patrick McHardy <kaber@...sh.net>,
	David Rientjes <rientjes@...gle.com>
Subject: [012/117] flex_array: fix the panic when calling flex_array_alloc() without __GFP_ZERO

2.6.33-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Changli Gao <xiaosuo@...il.com>

commit e59464c735db19619cde2aa331609adb02005f5b upstream.

memset() is called with the wrong address and the kernel panics.

Signed-off-by: Changli Gao <xiaosuo@...il.com>
Cc: Patrick McHardy <kaber@...sh.net>
Acked-by: David Rientjes <rientjes@...gle.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 lib/flex_array.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/flex_array.c
+++ b/lib/flex_array.c
@@ -99,7 +99,7 @@ struct flex_array *flex_array_alloc(int
 	ret->element_size = element_size;
 	ret->total_nr_elements = total;
 	if (elements_fit_in_base(ret) && !(flags & __GFP_ZERO))
-		memset(ret->parts[0], FLEX_ARRAY_FREE,
+		memset(&ret->parts[0], FLEX_ARRAY_FREE,
 						FLEX_ARRAY_BASE_BYTES_LEFT);
 	return ret;
 }


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