Re: [syzbot] [usb?] INFO: task hung in hub_activate (3)

[Alan Stern]

On Thu, Jul 03, 2025 at 10:48:56AM +0900, Tetsuo Handa wrote:
> On 2025/07/03 10:20, Tetsuo Handa wrote:
> > Caused by commit 9bd9c8026341 ("usb: hub: Fix flushing of delayed work
> > used for post resume purposes") with cc: stable.
> > Shouldn't we revert that commit and seek for a different approach
> > than wait for a reproducer?
> > 
> 
> Sorry, wrong commit.
> 
> The line was added by commit a49e1e2e785f ("usb: hub: Fix flushing and
> scheduling of delayed work that tunes runtime pm") with cc: stable.

Mathias has posted a fix for this problem:

https://lore.kernel.org/linux-usb/20250627164348.3982628-2-mathias.nyman@xxxxxxxxxxxxxxx/

It hasn't gotten into Linus's tree yet.

Alan Stern