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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Oliver Neukum <oneukum@suse.com>,
	Ben Hutchings <ben.hutchings@codethink.co.uk>,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Subject: [PATCH 5.9 04/15] media: usbtv: Fix refcounting mixup
Date: Fri, 16 Oct 2020 11:08:06 +0200	[thread overview]
Message-ID: <20201016090437.387840662@linuxfoundation.org> (raw)
In-Reply-To: <20201016090437.170032996@linuxfoundation.org>

From: Oliver Neukum <oneukum@suse.com>

commit bf65f8aabdb37bc1a785884374e919477fe13e10 upstream.

The premature free in the error path is blocked by V4L
refcounting, not USB refcounting. Thanks to
Ben Hutchings for review.

[v2] corrected attributions

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Fixes: 50e704453553 ("media: usbtv: prevent double free in error case")
CC: stable@vger.kernel.org
Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/usb/usbtv/usbtv-core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/media/usb/usbtv/usbtv-core.c
+++ b/drivers/media/usb/usbtv/usbtv-core.c
@@ -113,7 +113,8 @@ static int usbtv_probe(struct usb_interf
 
 usbtv_audio_fail:
 	/* we must not free at this point */
-	usb_get_dev(usbtv->udev);
+	v4l2_device_get(&usbtv->v4l2_dev);
+	/* this will undo the v4l2_device_get() */
 	usbtv_video_free(usbtv);
 
 usbtv_video_fail:



  parent reply	other threads:[~2020-10-16  9:12 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-16  9:08 [PATCH 5.9 00/15] 5.9.1-rc1 review Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 01/15] Bluetooth: A2MP: Fix not initializing all members Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 02/15] Bluetooth: L2CAP: Fix calling sk_filter on non-socket based channel Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 03/15] Bluetooth: MGMT: Fix not checking if BT_HS is enabled Greg Kroah-Hartman
2020-10-16  9:08 ` Greg Kroah-Hartman [this message]
2020-10-16  9:08 ` [PATCH 5.9 05/15] USB: serial: option: add Cellient MPL200 card Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 06/15] USB: serial: option: Add Telit FT980-KS composition Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 07/15] staging: comedi: check validity of wMaxPacketSize of usb endpoints found Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 08/15] USB: serial: pl2303: add device-id for HP GC device Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 09/15] USB: serial: ftdi_sio: add support for FreeCalypso JTAG+UART adapters Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 10/15] vt_ioctl: make VT_RESIZEX behave like VT_RESIZE Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 11/15] reiserfs: Initialize inode keys properly Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 12/15] reiserfs: Fix oops during mount Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 13/15] Revert "drm/amdgpu: Fix NULL dereference in dpm sysfs handlers" Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 14/15] crypto: bcm - Verify GCM/CCM key length in setkey Greg Kroah-Hartman
2020-10-16  9:08 ` [PATCH 5.9 15/15] crypto: qat - check cipher length for aead AES-CBC-HMAC-SHA Greg Kroah-Hartman
2020-10-16 12:21 ` [PATCH 5.9 00/15] 5.9.1-rc1 review Jeffrin Jose T
2020-10-16 16:45 ` Jon Hunter
2020-10-17 11:34   ` Greg Kroah-Hartman
2020-10-16 19:03 ` Naresh Kamboju
2020-10-17 11:34   ` Greg Kroah-Hartman
2020-10-16 21:09 ` Guenter Roeck
2020-10-17 11:34   ` Greg Kroah-Hartman
2020-10-17 16:02 ` Shuah Khan
2020-10-18  6:00   ` Greg Kroah-Hartman

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