diff --git a/kernel/crash_reserve.c b/kernel/crash_reserve.c
index 64d44a52c011..a620fb4b2116 100644
--- a/kernel/crash_reserve.c
+++ b/kernel/crash_reserve.c
@@ -335,6 +335,9 @@ int __init parse_crashkernel(char *cmdline,
 	if (!*crash_size)
 		ret = -EINVAL;
 
+	if (*crash_size >= system_ram)
+		ret = -EINVAL;
+
 	return ret;
 }