From 0d3ac81be223190c616947bd84749aebb73a7d2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adri=C3=A1n=20Larumbe?= <adrian.larumbe@collabora.com>
Date: Tue, 7 Jun 2022 18:27:13 +0100
Subject: kmscube: check return value when creating GBM device
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In the off-chance that gbm_create_device fails and returns a NULL value, further
down the line a segfault will be triggered when dereferencing gbm.dev.

Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
---
 common.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/common.c b/common.c
index 8ad0ad5..30d6017 100644
--- a/common.c
+++ b/common.c
@@ -124,7 +124,10 @@ const struct gbm * init_gbm(int drm_fd, int w, int h, uint32_t format,
 		uint64_t modifier, bool surfaceless)
 {
 	gbm.dev = gbm_create_device(drm_fd);
-	gbm.format = format;
+	if (!gbm.dev)
+		return NULL;
+
+        gbm.format = format;
 	gbm.surface = NULL;
 
 	gbm.width = w;
-- 
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