linux-kernel - [PATCH 1/3] bootconfig: Support non-ascii characters in value

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Date:   Fri, 14 Feb 2020 15:10:14 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     kernel-team@...roid.com, Mark Salyzyn <salyzyn@...roid.com>,
        Theodore Ts'o <tytso@....edu>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Richard Henderson <richard.henderson@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Alexander Potapenko <glider@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Juergen Gross <jgross@...e.com>, Rob Herring <robh@...nel.org>,
        linux-doc@...r.kernel.org
Subject: [PATCH 1/3] bootconfig: Support non-ascii characters in value

Support non-ascii (u8 code > 128) characters in the
value data. This will allow user to pass utf-8 data
as a value in a bootconfig. (Note that ascii non-
printable characters are still not allowed.)

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
 lib/bootconfig.c                              |    2 +-
 tools/bootconfig/samples/good-non-ascii.bconf |    1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 tools/bootconfig/samples/good-non-ascii.bconf

diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index 3ea601a2eba5..9f15b8bef3a0 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -466,7 +466,7 @@ static int __init __xbc_parse_value(char **__v, char **__n)
 	}
 	p = v - 1;
 	while ((c = *++p)) {
-		if (!isprint(c) && !isspace(c))
+		if (c >= 0 && !isprint(c) && !isspace(c))
 			return xbc_parse_error("Non printable value", p);
 		if (quotes) {
 			if (c != quotes)
diff --git a/tools/bootconfig/samples/good-non-ascii.bconf b/tools/bootconfig/samples/good-non-ascii.bconf
new file mode 100644
index 000000000000..b6cb4c24fad6
--- /dev/null
+++ b/tools/bootconfig/samples/good-non-ascii.bconf
@@ -0,0 +1 @@
+hello.japanese = "こんにちは"