1 files changed, 6 insertions, 0 deletions

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 2a0deffa5dbe..4e2e472f6aeb 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1358,6 +1358,10 @@ static int __init parse_crashkernel_simple(char 		*cmdline,
 
         if (*cur == '@')
                 *crash_base = memparse(cur+1, &cur);
+        else if (*cur != ' ' && *cur != '\0') {
+                pr_warning("crashkernel: unrecognized char\n");
+                return -EINVAL;
+        }
 
         return 0;
 }
@@ -1461,7 +1465,9 @@ static int __init crash_save_vmcoreinfo_init(void)
 
         VMCOREINFO_SYMBOL(init_uts_ns);
         VMCOREINFO_SYMBOL(node_online_map);
+#ifdef CONFIG_MMU
         VMCOREINFO_SYMBOL(swapper_pg_dir);
+#endif
         VMCOREINFO_SYMBOL(_stext);
         VMCOREINFO_SYMBOL(vmlist);