linux-kernel - [PATCH] lib/kstrtox.c Stop parsing integer on overflow

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Date:	Thu, 22 Jan 2015 05:58:50 -0800
From:	Anshul Garg <aksgarg1989@...il.com>
To:	akpm@...ux-foundation.org, levex@...ux.com,
	felipe.contreras@...il.com, linux-kernel@...r.kernel.org
Cc:	aksgarg1989@...il.com, anshul.g@...sung.com
Subject: [PATCH] lib/kstrtox.c Stop parsing integer on overflow

From: Anshul Garg <aksgarg1989@...il.com>

While converting string representation to integer
break the loop if overflow is detected.

Signed-off-by: Anshul Garg <aksgarg1989@...il.com>
---
 lib/kstrtox.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/kstrtox.c b/lib/kstrtox.c
index ec8da78..6f30209 100644
--- a/lib/kstrtox.c
+++ b/lib/kstrtox.c
@@ -70,8 +70,10 @@ unsigned int _parse_integer(const char *s, unsigned int base, unsigned long long
 		 * it in the max base we support (16)
 		 */
 		if (unlikely(res & (~0ull << 60))) {
-			if (res > div_u64(ULLONG_MAX - val, base))
+			if (res > div_u64(ULLONG_MAX - val, base)) {
 				overflow = 1;
+				break;
+			}
 		}
 		res = res * base + val;
 		rv++;
-- 
1.7.9.5


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