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

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Message-ID: <0000000000003bdc5f059476d153@google.com>
Date:   Wed, 09 Oct 2019 02:22:00 -0700
From:   syzbot <syzbot+d2a8670576fa63d18623@...kaller.appspotmail.com>
To:     davem@...emloft.net, jiri@...lanox.com, jon.maloy@...csson.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com,
        tipc-discussion@...ts.sourceforge.net, ying.xue@...driver.com
Subject: Re: KASAN: use-after-free Read in tipc_nl_node_dump_monitor_peer

syzbot has bisected this bug to:

commit 057af70713445fad2459aa348c9c2c4ecf7db938
Author: Jiri Pirko <jiri@...lanox.com>
Date:   Sat Oct 5 18:04:39 2019 +0000

     net: tipc: have genetlink code to parse the attrs during dumpit

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14ac08e7600000
start commit:   f9867b51 netdevsim: fix spelling mistake "forbidded" -> "f..
git tree:       net-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=16ac08e7600000
console output: https://syzkaller.appspot.com/x/log.txt?x=12ac08e7600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d9be300620399522
dashboard link: https://syzkaller.appspot.com/bug?extid=d2a8670576fa63d18623
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16d3e04f600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13a76593600000

Reported-by: syzbot+d2a8670576fa63d18623@...kaller.appspotmail.com
Fixes: 057af7071344 ("net: tipc: have genetlink code to parse the attrs  
during dumpit")

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