From: Austin Kim <austindh.kim@gmail.com>
Date: Fri, 1 Apr 2022 08:30:51 +0000 (+0100)
Subject: ARM: 9190/1: kdump: add invalid input check for 'crashkernel=0'
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9d17f3372306429661d8d44a5cbc0b1209e2ebe5;p=linux.git

ARM: 9190/1: kdump: add invalid input check for 'crashkernel=0'

Add invalid input check expression when 'crashkernel=0' is specified
running kdump.

Signed-off-by: Austin Kim <austindh.kim@gmail.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 284a80c0b6e10..7646d3ade56ce 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1004,7 +1004,8 @@ static void __init reserve_crashkernel(void)
 	total_mem = get_total_mem();
 	ret = parse_crashkernel(boot_command_line, total_mem,
 				&crash_size, &crash_base);
-	if (ret)
+	/* invalid value specified or crashkernel=0 */
+	if (ret || !crash_size)
 		return;
 
 	if (crash_base <= 0) {