[coreboot-gerrit] Change in coreboot[master]: superio/common: Fix NULL pointer dereferences

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/45627 )

Change subject: superio/common: Fix NULL pointer dereferences
......................................................................

superio/common: Fix NULL pointer dereferences

Coverity detects the dev->link_list NULL pointer dereferences while
calling report_resource_stored. Add sanity check for dev->link_list to
prevent NULL pointer dereference.

Found-by: Coverity CID 1419488
TEST=None

Signed-off-by: John Zhao 
Change-Id: I953a6524fff509a7833896392b25a3245c8cd705
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45627
Tested-by: build bot (Jenkins) 
Reviewed-by: Angel Pons 
---
M src/device/device_util.c
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, approved

diff --git a/src/device/device_util.c b/src/device/device_util.c
index 22c3db1..452a87b 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -519,7 +519,7 @@
    end = resource_end(resource);
    buf[0] = '\0';

-	if (resource->flags & IORESOURCE_PCI_BRIDGE) {
+	if (dev->link_list && (resource->flags & IORESOURCE_PCI_BRIDGE)) {
    	snprintf(buf, sizeof(buf),
    		 "bus %02x ", dev->link_list->secondary);
    }