linux-kernel - Re: KASAN: use-after-free Read in j1939_session_get_by

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Message-ID: <0000000000009427b5059694e33c@google.com>
Date:   Tue, 05 Nov 2019 00:05:01 -0800
From:   syzbot <syzbot+d9536adc269404a984f8@...kaller.appspotmail.com>
To:     Jose.Abreu@...opsys.com, arvid.brodin@...en.se,
        davem@...emloft.net, ilias.apalodimas@...aro.org,
        joabreu@...opsys.com, jose.abreu@...opsys.com,
        kernel@...gutronix.de, linux-can@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...pel-privat.de,
        mkl@...gutronix.de, netdev@...r.kernel.org, robin@...tonic.nl,
        socketcan@...tkopp.net, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in j1939_session_get_by_addr

syzbot has bisected this bug to:

commit 2af6106ae949651d529c8c3f0734c3a7babd0d4b
Author: Jose Abreu <Jose.Abreu@...opsys.com>
Date:   Tue Jul 9 08:03:00 2019 +0000

     net: stmmac: Introducing support for Page Pool

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15f481c8e00000
start commit:   1574cf83 Merge tag 'mlx5-updates-2019-11-01' of git://git...
git tree:       net-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=17f481c8e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=13f481c8e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c26333525dde4c39
dashboard link: https://syzkaller.appspot.com/bug?extid=d9536adc269404a984f8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16050314e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=159c59b2e00000

Reported-by: syzbot+d9536adc269404a984f8@...kaller.appspotmail.com
Fixes: 2af6106ae949 ("net: stmmac: Introducing support for Page Pool")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection