From: Pavel Skripkin <paskripkin@gmail.com>
To: dmitry.torokhov@gmail.com, aeh@db.org
Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
syzbot+2d6d691af5ab4b7e66df@syzkaller.appspotmail.com
Subject: Re: [PATCH] input: cm109: fix URB submitted while active
Date: Wed, 18 Aug 2021 14:07:44 +0300 [thread overview]
Message-ID: <19948c76-fa3c-26bb-7604-6de392ad9d49@gmail.com> (raw)
In-Reply-To: <20210804145801.2762-1-paskripkin@gmail.com>
On 8/4/21 5:58 PM, Pavel Skripkin wrote:
> Syzbot reported, that dev->urb_ctl was submitted while active. The
> problem was in missing validation check. We should check, that dev->urb_ctl
> is not pending before sumbitting it again.
>
> Fail log:
>
> URB 00000000cfeee59c submitted while active
> WARNING: CPU: 1 PID: 8459 at drivers/usb/core/urb.c:378 usb_submit_urb+0x1271/0x1540 drivers/usb/core/urb.c:378
> ...
> Call Trace:
> <IRQ>
> cm109_urb_irq_callback+0x44f/0xaa0 drivers/input/misc/cm109.c:422
> __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656
> usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726
>
> Reported-and-tested-by: syzbot+2d6d691af5ab4b7e66df@syzkaller.appspotmail.com
> Fixes: c04148f915e5 ("Input: add driver for USB VoIP phones with CM109 chipset")
> Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
> ---
Gentle ping :)
With regards,
Pavel Skripkin
> drivers/input/misc/cm109.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c
> index f515fae465c3..60bddadbbe3a 100644
> --- a/drivers/input/misc/cm109.c
> +++ b/drivers/input/misc/cm109.c
> @@ -406,7 +406,7 @@ static void cm109_urb_irq_callback(struct urb *urb)
>
> dev->irq_urb_pending = 0;
>
> - if (likely(!dev->shutdown)) {
> + if (likely(!dev->shutdown) && likely(!dev->ctl_urb_pending)) {
>
> if (dev->buzzer_state)
> dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
>
next prev parent reply other threads:[~2021-08-18 11:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 14:58 [PATCH] input: cm109: fix URB submitted while active Pavel Skripkin
2021-08-18 11:07 ` Pavel Skripkin [this message]
2021-09-19 17:30 ` Pavel Skripkin
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