Re: [PATCH] wireless: ath9k: hif_usb: fix race condition between usb_get_urb() and usb_kill_anchored_urbs()

[Kalle Valo]

Brooke Basile <brookebasile@xxxxxxxxx> wrote:

> Calls to usb_kill_anchored_urbs() after usb_kill_urb() on multiprocessor
> systems create a race condition in which usb_kill_anchored_urbs() deallocates
> the URB before the completer callback is called in usb_kill_urb(), resulting
> in a use-after-free.
> To fix this, add proper lock protection to usb_kill_urb() calls that can
> possibly run concurrently with usb_kill_anchored_urbs().
> 
> Reported-by: syzbot+89bd486af9427a9fc605@xxxxxxxxxxxxxxxxxxxxxxxxx
> Link: https://syzkaller.appspot.com/bug?id=cabffad18eb74197f84871802fd2c5117b61febf
> Signed-off-by: Brooke Basile <brookebasile@xxxxxxxxx>
> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>

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

03fb92a432ea ath9k: hif_usb: fix race condition between usb_get_urb() and usb_kill_anchored_urbs()

-- 
https://patchwork.kernel.org/patch/11769845/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches