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Message-ID: <20171107211850.GA17663@embeddedor.com>
Date: Tue, 7 Nov 2017 15:18:50 -0600
From: "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To: Andrey Konovalov <andreyknvl@...gle.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
LKML <linux-kernel@...r.kernel.org>
Cc: Dmitry Vyukov <dvyukov@...gle.com>,
Kostya Serebryany <kcc@...gle.com>,
syzkaller <syzkaller@...glegroups.com>,
"Gustavo A. R. Silva" <garsilva@...eddedor.com>
Subject: Re: usb/media/em28xx: use-after-free in em28xx_dvb_fini
Hi Andrey,
Could you please try this patch?
Thank you
Gustavo A. R. Silva
---
drivers/media/usb/em28xx/em28xx-dvb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c b/drivers/media/usb/em28xx/em28xx-dvb.c
index 4a7db62..fc3fb92 100644
--- a/drivers/media/usb/em28xx/em28xx-dvb.c
+++ b/drivers/media/usb/em28xx/em28xx-dvb.c
@@ -2073,6 +2073,9 @@ static int em28xx_dvb_fini(struct em28xx *dev)
struct em28xx_dvb *dvb;
struct i2c_client *client;
+ if (!dev)
+ return 0;
+
if (dev->is_audio_only) {
/* Shouldn't initialize IR for this interface */
return 0;
--
2.7.4
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