diff mbox series

backlight: pcf50633: pdata may be a null pointer, null pointer dereference cause crash

Message ID 1612190499-73818-1-git-send-email-driverfuzzing@gmail.com
State New
Headers show
Series backlight: pcf50633: pdata may be a null pointer, null pointer dereference cause crash | expand

Commit Message

Wenjia Zhao Feb. 1, 2021, 2:41 p.m. UTC 
Signed-off-by: Wenjia Zhao <driverfuzzing@gmail.com>
---
 drivers/video/backlight/pcf50633-backlight.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c
index 540dd338..43267af 100644
--- a/drivers/video/backlight/pcf50633-backlight.c
+++ b/drivers/video/backlight/pcf50633-backlight.c
@@ -127,7 +127,8 @@  static int pcf50633_bl_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, pcf_bl);
 
-	pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time);
+  if (pdata)
+    pcf50633_reg_write(pcf_bl->pcf, PCF50633_REG_LEDDIM, pdata->ramp_time);
 
 	/*
 	 * Should be different from bl_props.brightness, so we do not exit