Change in flashrom[master]: Copy parms only if it's not NULL.

[Ao Zhong (Code Review)]

Ao Zhong has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/63565 )

Change subject: Copy parms only if it's not NULL.
......................................................................

Copy parms only if it's not NULL.

The behavior of memcpy is undefined, when the source or destination is a
null pointer. Copy parms only if it's not NULL.

Signed-off-by: Ao Zhong 
Change-Id: I6517b57f62a2b333b7d2d28f69c0c65baa94070a
---
M serprog.c
1 file changed, 2 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/65/63565/1

diff --git a/serprog.c b/serprog.c
index 2bbf44b..27ec40b 100644
--- a/serprog.c
+++ b/serprog.c
@@ -291,7 +291,8 @@
    	return 1;
    }
    sp[0] = cmd;
-	memcpy(&(sp[1]), parms, parmlen);
+	if (parms != NULL)
+		memcpy(&(sp[1]), parms, parmlen);

if (sp_streamed_transmit_bytes >= (1 + parmlen + sp_device_serbuf_size)) {
    	if (sp_flush_stream() != 0) {