linux-kernel - [PATCH v2 2/2] MIPS: FW: Use kstrtoul() to parse unsigned long from the fw environment

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Date:	Sat,  8 Nov 2014 12:39:39 +0100
From:	Alban Bedel <albeu@...e.fr>
To:	linux-kernel@...r.kernel.org
Cc:	linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>,
	Alban Bedel <albeu@...e.fr>
Subject: [PATCH v2 2/2] MIPS: FW: Use kstrtoul() to parse unsigned long from the fw environment

Fix some value corruptions with values that can't be represented in a
signed long.

Signed-off-by: Alban Bedel <albeu@...e.fr>
---
v2: * No changes since v1
---
 arch/mips/fw/lib/cmdline.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/mips/fw/lib/cmdline.c b/arch/mips/fw/lib/cmdline.c
index a0c361e..6ecda64 100644
--- a/arch/mips/fw/lib/cmdline.c
+++ b/arch/mips/fw/lib/cmdline.c
@@ -88,13 +88,13 @@ unsigned long fw_getenvl(char *envname)
 {
 	unsigned long envl = 0UL;
 	char *str;
-	long val;
 	int tmp;
 
 	str = fw_getenv(envname);
 	if (str) {
-		tmp = kstrtol(str, 0, &val);
-		envl = (unsigned long)val;
+		tmp = kstrtoul(str, 0, &envl);
+		if (tmp)
+			envl = 0;
 	}
 
 	return envl;
-- 
2.0.0

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