[PATCH] libmount: avoid endless loop in, mnt_get_kernel_cmdline_option

[Bernhard Voelker <mail@bernhard-voelker.de>]

>From 4ddf21607847570e1da3b692276f2a8242bd5af6 Mon Sep 17 00:00:00 2001
From: Bernhard Voelker <mail@bernhard-voelker.de>
Date: Fri, 30 Nov 2012 17:12:12 +0100
Subject: [PATCH] libmount: avoid endless loop in
 mnt_get_kernel_cmdline_option

The above function infloops when the name to search for can only
be found at the beginning of /proc/cmdline but doesn't match,
e.g. when searching for "ro" in "root=/dev/sda1 quiet vga=0x31a".

* libmount/src/utils.c (mnt_get_kernel_cmdline_option): Replace
while by for loop to ensure the pointer p is incremented.

Signed-off-by: Bernhard Voelker <mail@bernhard-voelker.de>
---
 libmount/src/utils.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/libmount/src/utils.c b/libmount/src/utils.c
index 74c3ad5..be242d0 100644
--- a/libmount/src/utils.c
+++ b/libmount/src/utils.c
@@ -947,9 +947,7 @@ char *mnt_get_kernel_cmdline_option(const char *name)
 	if (len && *(name + len - 1) == '=')
 		val = 1;

-	while (p && *p) {
-		if (p != buf)
-			p++;
+	for ( ; p && *p; p++) {
 		if (!(p = strstr(p, name)))
 			break;			/* not found the option */
 		if (p != buf && !isblank(*(p - 1)))
-- 
1.7.7