Re: [syzbot] general protection fault in gadget_setup

[Alan Stern]

On Tue, Apr 13, 2021 at 06:47:47PM +0200, Dmitry Vyukov wrote:
> On Tue, Apr 13, 2021 at 6:13 PM Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> > Hopefully this patch will make the race a lot more likely to occur.  Is
> > there any way to tell syzkaller to test it, despite the fact that
> > syzkaller doesn't think it has a reproducer for this issue?
> 
> If there is no reproducer the only way syzbot can test it is if it's
> in linux-next under CONFIG_DEBUG_AID_FOR_SYZBOT:
> http://bit.do/syzbot#no-custom-patches

There _is_ a theoretical reproducer: the test that provoked syzkaller's 
original bug report.  But syzkaller doesn't realize that it is (or may 
be) a reproducer.

It ought to be possible to ask syzkaller to run a particular test that 
it has done before, with a patch applied -- and without having to add 
anything to linux-next.

Alan Stern