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[PATCH] firmware/dcdbas: add size check in smi_data_write

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Add a size check in smi_data_write to prevent possible wrapping problems
with large pos values when calling smi_data_buf_realloc on 32-bit.

Signed-off-by: Doug Warzecha <Douglas_Warzecha@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Doug Warzecha 2006-10-19 23:29:09 -07:00 committed by Linus Torvalds
parent 1cd441f998
commit b95936cb92
1 changed files with 5 additions and 2 deletions
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7
drivers/firmware/dcdbas.c
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@ -8,7 +8,7 @@
*
* See Documentation/dcdbas.txt for more information.
*
* Copyright (C) 1995-2005 Dell Inc.
* Copyright (C) 1995-2006 Dell Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2.0 as published by
@ -40,7 +40,7 @@
#include "dcdbas.h"
#define DRIVER_NAME "dcdbas"
#define DRIVER_VERSION "5.6.0-2"
#define DRIVER_VERSION "5.6.0-3.2"
#define DRIVER_DESCRIPTION "Dell Systems Management Base Driver"
static struct platform_device *dcdbas_pdev;
@ -175,6 +175,9 @@ static ssize_t smi_data_write(struct kobject *kobj, char *buf, loff_t pos,
{
ssize_t ret;
if ((pos + count) > MAX_SMI_DATA_BUF_SIZE)
return -EINVAL;
mutex_lock(&smi_data_lock);
ret = smi_data_buf_realloc(pos + count);