From: Liao Chang <liaochang1@xxxxxxxxxx>
[ Upstream commit fa706927f4722a2df723b2a28d139b1904a3e7fa ]
Add WARN_ON on kexec related kmalloc failed, avoid to pass NULL pointer
to following memcpy and loongson_kexec_prepare.
Fixes: 6ce48897ce47 ("MIPS: Loongson64: Add kexec/kdump support")
Signed-off-by: Liao Chang <liaochang1@xxxxxxxxxx>
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/mips/loongson64/reset.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/mips/loongson64/reset.c b/arch/mips/loongson64/reset.c
index 758d5d26aaaa..e420800043b0 100644
--- a/arch/mips/loongson64/reset.c
+++ b/arch/mips/loongson64/reset.c
@@ -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);
--
2.35.1
