Re: [PATCH v2] wifi: carl9170: add a proper sanity check for endpoints

Kalle Valo
2024-04-29T17:07:02Z

Nikita Zhandarovich <n.zhandarovich@fintech.ru> wrote:

> Syzkaller reports [1] hitting a warning which is caused by presence
> of a wrong endpoint type at the URB sumbitting stage. While there
> was a check for a specific 4th endpoint, since it can switch types
> between bulk and interrupt, other endpoints are trusted implicitly.
> Similar warning is triggered in a couple of other syzbot issues [2].
>
> Fix the issue by doing a comprehensive check of all endpoints
> taking into account difference between high- and full-speed
> configuration.
>
> [1] Syzkaller report:
> ...
> WARNING: CPU: 0 PID: 4721 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504
> ...
> Call Trace:
> <TASK>
> carl9170_usb_send_rx_irq_urb+0x273/0x340 drivers/net/wireless/ath/carl9170/usb.c:504
> carl9170_usb_init_device drivers/net/wireless/ath/carl9170/usb.c:939 [inline]
> carl9170_usb_firmware_finish drivers/net/wireless/ath/carl9170/usb.c:999 [inline]
> carl9170_usb_firmware_step2+0x175/0x240 drivers/net/wireless/ath/carl9170/usb.c:1028
> request_firmware_work_func+0x130/0x240 drivers/base/firmware_loader/main.c:1107
> process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
> worker_thread+0x669/0x1090 kernel/workqueue.c:2436
> kthread+0x2e8/0x3a0 kernel/kthread.c:376
> ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
> </TASK>
>
> [2] Related syzkaller crashes:
> Link: https://syzkaller.appspot.com/bug?extid=e394db78ae0b0032cb4d
> Link: https://syzkaller.appspot.com/bug?extid=9468df99cb63a4a4c4e1
>
> Reported-and-tested-by: syzbot+0ae4804973be759fa420@syzkaller.appspotmail.com
> Fixes: a84fab3cbfdc ("carl9170: 802.11 rx/tx processing and usb backend")
> Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
> Acked-By: Christian Lamparter <chunkeey@gmail.com>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

Patch applied to ath-next branch of ath.git, thanks.

b6dd09b3dac8 wifi: carl9170: add a proper sanity check for endpoints

--