Quoting syzbot (2019-11-06 04:32:09)
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: b1aa9d83 usb: raw: add raw-gadget interface
> git tree: https://github.com/google/kasan.git usb-fuzzer
> console output: https://syzkaller.appspot.com/x/log.txt?x=16ae2adce00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=79de80330003b5f7
> dashboard link: https://syzkaller.appspot.com/bug?extid=f41c4f7c6d8b0b778780
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10248158e00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16afbf7ce00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: [email protected]
I suspect this is because of the kthread getting stuck problem reported
by Maciej. Maybe try the commit that Herbert picked up.
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6.git linus
> Quoting syzbot (2019-11-06 04:32:09)
>> Hello,
>> syzbot found the following crash on:
>> HEAD commit: b1aa9d83 usb: raw: add raw-gadget interface
>> git tree: https://github.com/google/kasan.git usb-fuzzer
>> console output: https://syzkaller.appspot.com/x/log.txt?x=16ae2adce00000
>> kernel config:
>> https://syzkaller.appspot.com/x/.config?x=79de80330003b5f7
>> dashboard link:
>> https://syzkaller.appspot.com/bug?extid=f41c4f7c6d8b0b778780
>> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>> syz repro:
>> https://syzkaller.appspot.com/x/repro.syz?x=10248158e00000
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16afbf7ce00000
>> IMPORTANT: if you fix the bug, please add the following tag to the
>> commit:
>> Reported-by: [email protected]
> I suspect this is because of the kthread getting stuck problem reported
> by Maciej. Maybe try the commit that Herbert picked up.
> #syz test:
> git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6.git linus
Bugs found by USB fuzzer can only be tested on
https://github.com/google/kasan.git tree,
usb-fuzzer branch because USB fuzzer is not upstreamed yet.
See https://goo.gl/tpsmEJ#usb-fuzzer for details.
Am Freitag, den 15.11.2019, 09:51 -0800 schrieb Stephen Boyd:
> Quoting syzbot (2019-11-06 04:32:09)
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit: b1aa9d83 usb: raw: add raw-gadget interface
> > git tree: https://github.com/google/kasan.git usb-fuzzer
> > console output: https://syzkaller.appspot.com/x/log.txt?x=16ae2adce00000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=79de80330003b5f7
> > dashboard link: https://syzkaller.appspot.com/bug?extid=f41c4f7c6d8b0b778780
> > compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10248158e00000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16afbf7ce00000
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: [email protected]
>
> I suspect this is because of the kthread getting stuck problem reported
> by Maciej. Maybe try the commit that Herbert picked up.
Do you have a commit ID so we can test an exported patch?
Regards
Oliver
Quoting Oliver Neukum (2019-11-20 02:55:49)
> Am Freitag, den 15.11.2019, 09:51 -0800 schrieb Stephen Boyd:
> > Quoting syzbot (2019-11-06 04:32:09)
> > > Hello,
> > >
> > > syzbot found the following crash on:
> > >
> > > HEAD commit: b1aa9d83 usb: raw: add raw-gadget interface
> > > git tree: https://github.com/google/kasan.git usb-fuzzer
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=16ae2adce00000
> > > kernel config: https://syzkaller.appspot.com/x/.config?x=79de80330003b5f7
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=f41c4f7c6d8b0b778780
> > > compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10248158e00000
> > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16afbf7ce00000
> > >
> > > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > > Reported-by: [email protected]
> >
> > I suspect this is because of the kthread getting stuck problem reported
> > by Maciej. Maybe try the commit that Herbert picked up.
>
> Do you have a commit ID so we can test an exported patch?
>
I sent the patch in. See https://lkml.kernel.org/r/[email protected]
for what happened. It didn't make a difference. I'll have to stare at it
a little more to figure out what's going on.