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From: Wenjia Zhao <driverfuzzing@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: driverfuzzing@gmail.com, Lee Jones <lee.jones@linaro.org>,
	Daniel Thompson <daniel.thompson@linaro.org>,
	Jingoo Han <jingoohan1@gmail.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] backlight: pcf50633: pdata may be a null pointer, null pointer dereference cause crash
Date: Mon,  1 Feb 2021 08:41:38 -0600	[thread overview]
Message-ID: <1612190499-73818-1-git-send-email-driverfuzzing@gmail.com> (raw)

Signed-off-by: Wenjia Zhao <driverfuzzing@gmail.com>
---
 drivers/video/backlight/pcf50633-backlight.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: Wenjia Zhao <driverfuzzing@gmail.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>,
	driverfuzzing@gmail.com,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org, Lee Jones <lee.jones@linaro.org>
Subject: [PATCH] backlight: pcf50633: pdata may be a null pointer, null pointer dereference cause crash
Date: Mon,  1 Feb 2021 08:41:38 -0600	[thread overview]
Message-ID: <1612190499-73818-1-git-send-email-driverfuzzing@gmail.com> (raw)

Signed-off-by: Wenjia Zhao <driverfuzzing@gmail.com>
---
 drivers/video/backlight/pcf50633-backlight.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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
-- 
2.7.4

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             reply	other threads:[~2021-02-01 14:46 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-01 14:41 Wenjia Zhao [this message]
2021-02-01 14:41 ` [PATCH] backlight: pcf50633: pdata may be a null pointer, null pointer dereference cause crash Wenjia Zhao
2021-02-02  8:28 ` Lee Jones
2021-02-02  8:28   ` Lee Jones
2021-02-02  9:25 ` Daniel Thompson
2021-02-02  9:25   ` Daniel Thompson
2021-02-02 21:25   ` FUZZ DR
2021-02-03 11:42     ` Daniel Thompson
2021-02-03 11:42       ` Daniel Thompson

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