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
next reply other threads:[~2021-02-01 14:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 14:41 Wenjia Zhao [this message]
2021-02-02 8:28 ` [PATCH] backlight: pcf50633: pdata may be a null pointer, null pointer dereference cause crash Lee Jones
2021-02-02 9:25 ` Daniel Thompson
[not found] ` <CABF6pWFar726YKG9y_wVZoX9fd7DxBQce0AZKAibmmzU9qZpMA@mail.gmail.com>
2021-02-03 11:42 ` Daniel Thompson
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