linux-kernel - [PATCH 5.8 83/99] lib/bootconfig: Fix to remove tailing spaces after value

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Message-Id: <20200929105933.822431869@linuxfoundation.org>
Date:   Tue, 29 Sep 2020 13:02:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>
Subject: [PATCH 5.8 83/99] lib/bootconfig: Fix to remove tailing spaces after value

From: Masami Hiramatsu <mhiramat@...nel.org>

commit c7af4ecdffe1537ba8aeed0ac12c3326f908df43 upstream.

Fix to remove tailing spaces after value. If there is a space
after value, the bootconfig failed to remove it because it
applies strim() before replacing the delimiter with null.

For example,

foo = var    # comment

was parsed as below.

foo="var    "

but user will expect

foo="var"

This fixes it by applying strim() after removing the delimiter.

Link: https://lkml.kernel.org/r/160068149134.1088739.8868306567670058853.stgit@devnote2

Fixes: 76db5a27a827 ("bootconfig: Add Extra Boot Config support")
Cc: Ingo Molnar <mingo@...hat.com>
Cc: stable@...r.kernel.org
Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 lib/bootconfig.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -486,8 +486,8 @@ static int __init __xbc_parse_value(char
 			break;
 		}
 		if (strchr(",;\n#}", c)) {
-			v = strim(v);
 			*p++ = '\0';
+			v = strim(v);
 			break;
 		}
 	}