Re: [syzbot] [usb?] KASAN: slab-use-after-free Write in usb_anchor_suspend_wakeups

[Oliver Neukum]

On 12.08.23 17:56, Alan Stern wrote:
Hi,
 
> The real problem seems to be some sort of race in usbtmc and the core
> between URBs being added to an anchor, file I/O being stopped, and URBs
> being killed or scuttled when the file is flushed.

just to make sure, you think it is failing here:

usb_anchor_resume_wakeups(anchor);

because we cannot guarantee that the anchor pointer
is still valid, unless we refcount anchors, which would
make embedding them impossible?

	Regards
		Oliver