* Re: KASAN: slab-out-of-bounds Read in tick_sched_handle
[not found] <000000000000551b80057d31a5f7@google.com>
@ 2019-03-16 14:49 ` syzbot
2019-03-16 15:52 ` Stefano Brivio
0 siblings, 1 reply; 4+ messages in thread
From: syzbot @ 2019-03-16 14:49 UTC (permalink / raw)
To: davem, fweisbec, kuznet, linux-kernel, mingo, netdev, sbrivio, sd,
syzkaller-bugs, tglx, yoshfuji
syzbot has bisected this bug to:
commit b8a51b38e4d4dec3e379d52c0fe1a66827f7cf1e
Author: Stefano Brivio <sbrivio@redhat.com>
Date: Thu Nov 8 11:19:23 2018 +0000
fou, fou6: ICMP error handlers for FoU and GUE
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16f943e7200000
start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=15f943e7200000
console output: https://syzkaller.appspot.com/x/log.txt?x=11f943e7200000
kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2
dashboard link: https://syzkaller.appspot.com/bug?extid=09d51a30df9fe76edb2a
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17359fab400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=154a2a37400000
Reported-by: syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com
Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE")
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in tick_sched_handle
2019-03-16 14:49 ` KASAN: slab-out-of-bounds Read in tick_sched_handle syzbot
@ 2019-03-16 15:52 ` Stefano Brivio
2019-03-16 16:07 ` Dmitry Vyukov
0 siblings, 1 reply; 4+ messages in thread
From: Stefano Brivio @ 2019-03-16 15:52 UTC (permalink / raw)
To: syzbot
Cc: davem, fweisbec, kuznet, linux-kernel, mingo, netdev, sd,
syzkaller-bugs, tglx, yoshfuji, Eric Dumazet
On Sat, 16 Mar 2019 07:49:01 -0700
syzbot <syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com> wrote:
> syzbot has bisected this bug to:
>
> commit b8a51b38e4d4dec3e379d52c0fe1a66827f7cf1e
> Author: Stefano Brivio <sbrivio@redhat.com>
> Date: Thu Nov 8 11:19:23 2018 +0000
>
> fou, fou6: ICMP error handlers for FoU and GUE
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16f943e7200000
> start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
> git tree: upstream
> final crash: https://syzkaller.appspot.com/x/report.txt?x=15f943e7200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=11f943e7200000
> kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2
> dashboard link: https://syzkaller.appspot.com/bug?extid=09d51a30df9fe76edb2a
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17359fab400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=154a2a37400000
>
> Reported-by: syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com
> Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE")
Might be fixed by bc6e019b6ee6 ("fou: Prevent unbounded recursion in GUE
error handler also with UDP-Lite"), testing/checking now.
--
Stefano
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in tick_sched_handle
2019-03-16 15:52 ` Stefano Brivio
@ 2019-03-16 16:07 ` Dmitry Vyukov
2019-03-16 16:22 ` Stefano Brivio
0 siblings, 1 reply; 4+ messages in thread
From: Dmitry Vyukov @ 2019-03-16 16:07 UTC (permalink / raw)
To: Stefano Brivio
Cc: syzbot, David Miller, Frédéric Weisbecker,
Alexey Kuznetsov, LKML, Ingo Molnar, netdev, Sabrina Dubroca,
syzkaller-bugs, Thomas Gleixner, Hideaki YOSHIFUJI, Eric Dumazet
On Sat, Mar 16, 2019 at 4:53 PM Stefano Brivio <sbrivio@redhat.com> wrote:
>
> On Sat, 16 Mar 2019 07:49:01 -0700
> syzbot <syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com> wrote:
>
> > syzbot has bisected this bug to:
> >
> > commit b8a51b38e4d4dec3e379d52c0fe1a66827f7cf1e
> > Author: Stefano Brivio <sbrivio@redhat.com>
> > Date: Thu Nov 8 11:19:23 2018 +0000
> >
> > fou, fou6: ICMP error handlers for FoU and GUE
> >
> > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16f943e7200000
> > start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
> > git tree: upstream
> > final crash: https://syzkaller.appspot.com/x/report.txt?x=15f943e7200000
> > console output: https://syzkaller.appspot.com/x/log.txt?x=11f943e7200000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2
> > dashboard link: https://syzkaller.appspot.com/bug?extid=09d51a30df9fe76edb2a
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17359fab400000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=154a2a37400000
> >
> > Reported-by: syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com
> > Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE")
>
> Might be fixed by bc6e019b6ee6 ("fou: Prevent unbounded recursion in GUE
> error handler also with UDP-Lite"), testing/checking now.
Yes, most likely it is. The bug was just never closed as fixed. But
the last crash happened 2 months ago.
So I would say we just mark this as fixed:
#syz fix:
fou: Prevent unbounded recursion in GUE error handler also with UDP-Lite
Next after root cause bisection is fix bisection, so this part will be
automated to some degree as well.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: KASAN: slab-out-of-bounds Read in tick_sched_handle
2019-03-16 16:07 ` Dmitry Vyukov
@ 2019-03-16 16:22 ` Stefano Brivio
0 siblings, 0 replies; 4+ messages in thread
From: Stefano Brivio @ 2019-03-16 16:22 UTC (permalink / raw)
To: Dmitry Vyukov
Cc: syzbot, David Miller, Frédéric Weisbecker,
Alexey Kuznetsov, LKML, Ingo Molnar, netdev, Sabrina Dubroca,
syzkaller-bugs, Thomas Gleixner, Hideaki YOSHIFUJI, Eric Dumazet
On Sat, 16 Mar 2019 17:07:13 +0100
Dmitry Vyukov <dvyukov@google.com> wrote:
> On Sat, Mar 16, 2019 at 4:53 PM Stefano Brivio <sbrivio@redhat.com> wrote:
> >
> > On Sat, 16 Mar 2019 07:49:01 -0700
> > syzbot <syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com> wrote:
> >
> > > syzbot has bisected this bug to:
> > >
> > > commit b8a51b38e4d4dec3e379d52c0fe1a66827f7cf1e
> > > Author: Stefano Brivio <sbrivio@redhat.com>
> > > Date: Thu Nov 8 11:19:23 2018 +0000
> > >
> > > fou, fou6: ICMP error handlers for FoU and GUE
> > >
> > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16f943e7200000
> > > start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE
> > > git tree: upstream
> > > final crash: https://syzkaller.appspot.com/x/report.txt?x=15f943e7200000
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=11f943e7200000
> > > kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=09d51a30df9fe76edb2a
> > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17359fab400000
> > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=154a2a37400000
> > >
> > > Reported-by: syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com
> > > Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE")
> >
> > Might be fixed by bc6e019b6ee6 ("fou: Prevent unbounded recursion in GUE
> > error handler also with UDP-Lite"), testing/checking now.
>
> Yes, most likely it is. The bug was just never closed as fixed. But
> the last crash happened 2 months ago.
> So I would say we just mark this as fixed:
>
> #syz fix:
> fou: Prevent unbounded recursion in GUE error handler also with UDP-Lite
Confirmed by testing, too.
> Next after root cause bisection is fix bisection, so this part will be
> automated to some degree as well.
Nice, thanks for doing that.
--
Stefano
^ permalink raw reply [flat|nested] 4+ messages in thread
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2019-03-16 14:49 ` KASAN: slab-out-of-bounds Read in tick_sched_handle syzbot
2019-03-16 15:52 ` Stefano Brivio
2019-03-16 16:07 ` Dmitry Vyukov
2019-03-16 16:22 ` Stefano Brivio
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