commit a737abd11ac4eb9f4226fa8c9f1d9b5be12a96c1
author Cyrill Gorcunov <gorcunov@gmail.com> Sat Jul 05 15:53:39 2008 +0400
committer Ingo Molnar <mingo@elte.hu> Wed Jul 09 13:58:07 2008 +0200
tree 79a2e5264d9d6990adf8d7ced944cca112df96d6
parent c22d4c1885130db9c07f6441ab461208a1ba16b2

x86: e820 memmap - add checking for NULL early param

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: akpm@linux-foundation.org
Cc: andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/e820.c

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 292ebc7..66fd5bd 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1198,6 +1198,9 @@
 	char *oldp;
 	u64 start_at, mem_size;
 
+	if (!p)
+		return -EINVAL;
+
 	if (!strcmp(p, "exactmap")) {
 #ifdef CONFIG_CRASH_DUMP
 		/*