Re: divide error in usbtmc_generic_read

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On Thu, Aug 15, 2019 at 3:31 PM Oliver Neukum <oneukum@xxxxxxxx> wrote:
>
> Am Mittwoch, den 14.08.2019, 06:38 -0700 schrieb syzbot:
> > syzbot has tested the proposed patch but the reproducer still triggered
> > crash:
> > KASAN: use-after-free Read in usbtmc_disconnect
>
> I am afraid that is a difficiency in KASAN that should be fixed.
> Is the class of the error compared if I leave in more of the
> original bug report? Actually the ID is still there, so it really
> should return an inconclusive in these cases.

I don't get this, what kind of deficiency do you mean?

Anyway, looks like I was wrong, the reported use-after-free is caused
by an incomplete fix, and setting the right retcode fixes the
use-after-free.



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