From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 6 Nov 2013 07:41:28 +0000 (+0300)
Subject: wcn36xx: harmless memory corruption bug in debugfs
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=876efcf05c3aa582de5efefa7dd6fbb731b4d085;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

wcn36xx: harmless memory corruption bug in debugfs

On 64 bit systems we write past the end of the arg[] array.

Fixes: 8e84c2582169 ('wcn36xx: mac80211 driver for Qualcomm WCN3660/WCN3680 hardware')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/wcn36xx/debug.c b/drivers/net/wireless/ath/wcn36xx/debug.c
index 5b84f7ae0b1e..ef44a2da644d 100644
--- a/drivers/net/wireless/ath/wcn36xx/debug.c
+++ b/drivers/net/wireless/ath/wcn36xx/debug.c
@@ -126,7 +126,7 @@ static ssize_t write_file_dump(struct file *file,
 		if (begin == NULL)
 			break;
 
-		if (kstrtoul(begin, 0, (unsigned long *)(arg + i)) != 0)
+		if (kstrtou32(begin, 0, &arg[i]) != 0)
 			break;
 	}