From: bugzilla-daemon@bugzilla.kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 207871] nullpointer dereference in uvc_video_stop_streaming
Date: Sun, 24 May 2020 21:53:53 +0000 [thread overview]
Message-ID: <bug-207871-208809-otbEKczCoF@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-207871-208809@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=207871
--- Comment #4 from Tobias Diedrich (ranma+kernel@tdiedrich.de) ---
I'm guessing that's the device disconnect callback?
static void uvc_disconnect(struct usb_interface *intf)
{
struct uvc_device *dev = usb_get_intfdata(intf);
/* Set the USB interface data to NULL. This can be done outside the
* lock, as there's no other reader.
*/
usb_set_intfdata(intf, NULL);
if (intf->cur_altsetting->desc.bInterfaceSubClass ==
UVC_SC_VIDEOSTREAMING)
return;
uvc_unregister_video(dev);
kref_put(&dev->ref, uvc_delete);
}
Meanwhile uvc_stop_streaming is a vb2_ops (videobuf2) callback from the
V4L2CaptureThread.
I'm guessing then that uvc_disconnect() should wait for videobufs to be stopped
before returning?
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next prev parent reply other threads:[~2020-05-24 21:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-23 19:28 [Bug 207871] New: nullpointer dereference in uvc_video_stop_streaming bugzilla-daemon
2020-05-24 11:05 ` [Bug 207871] " bugzilla-daemon
2020-05-24 14:38 ` bugzilla-daemon
2020-05-24 21:53 ` bugzilla-daemon [this message]
2020-05-25 0:41 ` bugzilla-daemon
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