[PATCH] boot: simple_alloc: check after increasing memory allocation

[Li zeming]

The pointer new adds judgment and should help with program robustness.

Signed-off-by: Li zeming <zeming at nfschina.com>
---
 arch/powerpc/boot/simple_alloc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/boot/simple_alloc.c b/arch/powerpc/boot/simple_alloc.c
index 267d6524caac..db9aaa5face3 100644
--- a/arch/powerpc/boot/simple_alloc.c
+++ b/arch/powerpc/boot/simple_alloc.c
@@ -112,7 +112,9 @@ static void *simple_realloc(void *ptr, unsigned long size)
 		return ptr;
 
 	new = simple_malloc(size);
-	memcpy(new, ptr, p->size);
+	if (new)
+		memcpy(new, ptr, p->size);
+
 	simple_free(ptr);
 	return new;
 }
-- 
2.18.2