From: Oliver Neukum <oneukum@suse.com>
To: Hillf Danton <hdanton@sina.com>,
syzbot <syzbot+a7a6b9c609b9457c62c6@syzkaller.appspotmail.com>
Cc: gustavo@embeddedor.com, Jiri Slaby <jirislaby@gmail.com>,
andreyknvl@google.com, syzkaller-bugs@googlegroups.com,
gregkh@linuxfoundation.org, stern@rowland.harvard.edu,
Jiri Kosina <jkosina@suse.cz>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org
Subject: Re: WARNING in usbhid_raw_request/usb_submit_urb
Date: Tue, 13 Aug 2019 10:14:54 +0200 [thread overview]
Message-ID: <1565684094.7043.3.camel@suse.com> (raw)
In-Reply-To: <20190813042649.888-1-hdanton@sina.com>
Am Dienstag, den 13.08.2019, 12:26 +0800 schrieb Hillf Danton:
> [respin with the mess in Cc list cleaned up]
> Followup of commit e3e14de50dff ("HID: fix start/stop cycle in usbhid driver")
>
> --- a/drivers/hid/usbhid/hid-core.c
> +++ b/drivers/hid/usbhid/hid-core.c
> @@ -1214,6 +1214,8 @@ static void usbhid_stop(struct hid_devic
>
> hid->claimed = 0;
>
> + if (!usbhid->urbin) /* freeing buffers only once */
> + return;
> usb_free_urb(usbhid->urbin);
> usb_free_urb(usbhid->urbctrl);
> usb_free_urb(usbhid->urbout);
This looks rather suspicious. Why is stop() called multiple times?
Do we have a refcounting issue? If not, what controls locking?
Regards
Oliver
prev parent reply other threads:[~2019-08-13 8:15 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 11:48 WARNING in usbhid_raw_request/usb_submit_urb syzbot
2019-07-30 14:10 ` Alan Stern
2019-07-30 14:12 ` Andrey Konovalov
2019-07-30 14:24 ` Oliver Neukum
2019-07-30 16:58 ` syzbot
2019-08-12 12:46 ` Andrey Konovalov
2019-08-12 13:03 ` syzbot
2019-08-12 14:23 ` Andrey Konovalov
2019-08-13 20:13 ` Alan Stern
2019-08-21 12:51 ` Andrey Konovalov
2019-08-21 13:09 ` syzbot
2019-08-21 14:08 ` Andrey Konovalov
[not found] ` <20190812144720.1980-1-hdanton@sina.com>
2019-08-12 14:55 ` Andrey Konovalov
2019-08-12 15:06 ` general protection fault in __pm_runtime_resume syzbot
2019-08-15 17:43 ` Alan Stern
2019-08-20 20:00 ` [PATCH] HID: USB: Fix general protection fault caused by Logitech driver Alan Stern
2019-08-21 14:11 ` Andrey Konovalov
2019-08-22 7:53 ` Jiri Kosina
2019-08-22 12:32 ` Andrey Konovalov
2019-08-22 17:11 ` Alan Stern
2019-08-22 18:25 ` Andrey Konovalov
2019-08-22 20:21 ` Alan Stern
2019-08-23 9:29 ` Jiri Kosina
2019-08-24 0:41 ` Roderick.Colenbrander
2019-09-03 10:46 ` Andrey Konovalov
2019-09-03 20:00 ` Roderick.Colenbrander
[not found] ` <20190813042649.888-1-hdanton@sina.com>
2019-08-13 7:35 ` WARNING in usbhid_raw_request/usb_submit_urb Dmitry Vyukov
2019-08-13 8:14 ` Oliver Neukum [this message]
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