Re: [syzbot] [usb?] INFO: task hung in unbind_store

[Michal Pecio]

On Thu, 27 Aug 2026 11:00:06 +0200, Michal Pecio wrote:
> And something is also wrong with those timeouts, because 20 times 5s
> should still be less than 143 s. I asked Syzbot to try 500ms instead,
> which ended up being over 3s in practice:
> 
> [  566.662036][ T6636] usb 4-1: sisusb_send_bulk_msg()
> [  569.717341][ T6636] usb 4-1: sisusb_send_bulk_msg()
> [  572.777761][ T6636] usb 4-1: sisusb_send_bulk_msg()
> [  575.845365][ T6636] usb 4-1: sisusb_send_bulk_msg()
> 
> Same on my system, but patch below reduces the timeout to 500ms.
> 
> I have no idea what's happening here. Looks like a bug?
> Is it known that jiffies are totally unreliable like that?

Sorry for the noise, timeouts are 500ms as inteneded but the function
tries 6 times, which makes it 3 seconds.