If of_device_get_match_data() return NULL,
then null pointer dereference occurs in s5p_mfc_init_pm().
The patch adds checking if dev->variant is NULL.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Nadezda Lutovinova <[email protected]>
---
drivers/media/platform/s5p-mfc/s5p_mfc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index eba2b9f040df..b56ff75cb9cc 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -1288,6 +1288,10 @@ static int s5p_mfc_probe(struct platform_device *pdev)
}
dev->variant = of_device_get_match_data(&pdev->dev);
+ if (!dev->variant) {
+ dev_err(&pdev->dev, "Failed to get device MFC hardware variant information\n");
+ return -ENOENT;
+ }
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dev->regs_base = devm_ioremap_resource(&pdev->dev, res);
--
2.17.1