linux-kernel - [PATCH 4.9 026/151] m68k: fix command-line parsing when passed from u-boot

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Message-Id: <20191127203016.991243313@linuxfoundation.org>
Date:   Wed, 27 Nov 2019 21:30:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Angelo Dureghello <angelo@...am.it>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 026/151] m68k: fix command-line parsing when passed from u-boot

From: Angelo Dureghello <angelo@...am.it>

[ Upstream commit 381fdd62c38344a771aed06adaf14aae65c47454 ]

This patch fixes command_line array zero-terminated
one byte over the end of the array, causing boot to hang.

Signed-off-by: Angelo Dureghello <angelo@...am.it>
Signed-off-by: Greg Ungerer <gerg@...ux-m68k.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/m68k/kernel/uboot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/m68k/kernel/uboot.c b/arch/m68k/kernel/uboot.c
index b3536a82a2620..e002084af1012 100644
--- a/arch/m68k/kernel/uboot.c
+++ b/arch/m68k/kernel/uboot.c
@@ -103,5 +103,5 @@ __init void process_uboot_commandline(char *commandp, int size)
 	}
 
 	parse_uboot_commandline(commandp, len);
-	commandp[size - 1] = 0;
+	commandp[len - 1] = 0;
 }
-- 
2.20.1