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MIPS: Loongson64: Add WARN_ON on kexec related kmalloc failed

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[ Upstream commit fa706927f4 ]

Add WARN_ON on kexec related kmalloc failed, avoid to pass NULL pointer
to following memcpy and loongson_kexec_prepare.

Fixes: 6ce48897ce ("MIPS: Loongson64: Add kexec/kdump support")
Signed-off-by: Liao Chang <liaochang1@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Liao Chang 2022-11-03 09:18:15 +08:00 • committed by Justin Hammond
parent 27ea2d5d05
commit fd5bcaf13e
1 changed files with 10 additions and 0 deletions
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10
arch/mips/loongson64/reset.c
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@ -16,6 +16,7 @@
#include <asm/bootinfo.h>
#include <asm/idle.h>
#include <asm/reboot.h>
#include <asm/bug.h>
#include <loongson.h>
#include <boot_param.h>
@ -159,8 +160,17 @@ static int __init mips_reboot_setup(void)
#ifdef CONFIG_KEXEC
kexec_argv = kmalloc(KEXEC_ARGV_SIZE, GFP_KERNEL);
if (WARN_ON(!kexec_argv))
return -ENOMEM;
kdump_argv = kmalloc(KEXEC_ARGV_SIZE, GFP_KERNEL);
if (WARN_ON(!kdump_argv))
return -ENOMEM;
kexec_envp = kmalloc(KEXEC_ENVP_SIZE, GFP_KERNEL);
if (WARN_ON(!kexec_envp))
return -ENOMEM;
fw_arg1 = KEXEC_ARGV_ADDR;
memcpy(kexec_envp, (void *)fw_arg2, KEXEC_ENVP_SIZE);