[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20180701153125.591292918@linuxfoundation.org>
Date: Sun, 1 Jul 2018 18:02:39 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Dr Silvio Cesare of InfoSect <silvio.cesare@...il.com>,
Kees Cook <keescook@...omium.org>
Subject: [PATCH 3.18 81/85] video: uvesafb: Fix integer overflow in allocation
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kees Cook <keescook@...omium.org>
commit 9f645bcc566a1e9f921bdae7528a01ced5bc3713 upstream.
cmap->len can get close to INT_MAX/2, allowing for an integer overflow in
allocation. This uses kmalloc_array() instead to catch the condition.
Reported-by: Dr Silvio Cesare of InfoSect <silvio.cesare@...il.com>
Fixes: 8bdb3a2d7df48 ("uvesafb: the driver core")
Cc: stable@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/video/fbdev/uvesafb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/video/fbdev/uvesafb.c
+++ b/drivers/video/fbdev/uvesafb.c
@@ -1059,7 +1059,8 @@ static int uvesafb_setcmap(struct fb_cma
info->cmap.len || cmap->start < info->cmap.start)
return -EINVAL;
- entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
+ entries = kmalloc_array(cmap->len, sizeof(*entries),
+ GFP_KERNEL);
if (!entries)
return -ENOMEM;
Powered by blists - more mailing lists