linux-kernel - [PATCH] param: fixup quote parsing of kernel arguments

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Date:	Tue,  7 Apr 2015 13:20:35 +0200
From:	Arthur Gautier <baloo@...di.net>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	linux-kernel@...r.kernel.org, Arthur Gautier <baloo@...di.net>
Subject: [PATCH] param: fixup quote parsing of kernel arguments

When starting kernel with arguments like:
  init=/bin/sh -c "echo arguments"
the trailing double quote is not removed which results in following command
being executed:
  /bin/sh -c 'echo arguments"'

This commit removes the trailing double quote.

Signed-off-by: Arthur Gautier <baloo@...di.net>
---
 kernel/params.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/params.c b/kernel/params.c
index 728e05b..2118546 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -156,8 +156,11 @@ static char *next_arg(char *args, char **param, char **val)
 			if (args[i] == '=')
 				equals = i;
 		}
-		if (args[i] == '"')
+		if (args[i] == '"') {
+			if (!equals)
+				args[i] = '\0';
 			in_quote = !in_quote;
+		}
 	}
 
 	*param = args;
-- 
2.1.4

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