[coreboot-gerrit] Change in ...coreboot[master]: util/romcc: Add extra null pointer check

[Jacob Garber (Code Review)]

Jacob Garber has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/32917

Change subject: util/romcc: Add extra null pointer check
......................................................................

util/romcc: Add extra null pointer check

It is possible that 'lnode->val' is set to 0 on a previous iteration of
the loop, so check that it is non-null here before dereferencing it.

Change-Id: I9827dd5623eaf11240df605a8b50ff9e27a5fce0
Signed-off-by: Jacob Garber 
Found-by: Coverity CID 1129149
---
M util/romcc/romcc.c
1 file changed, 2 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/17/32917/1

diff --git a/util/romcc/romcc.c b/util/romcc/romcc.c
index b9ec835..f8f8374 100644
--- a/util/romcc/romcc.c
+++ b/util/romcc/romcc.c
@@ -20935,7 +20935,8 @@
    		}
    	}
    	/* meet(const, const) = const or lattice low */
-		else if (!constants_equal(state, lnode->val, tmp->val)) {
+		else if (lnode->val != 0 &&
+				!constants_equal(state, lnode->val, tmp->val)) {
    		lnode->val = 0;
    	}