Re: KASAN: use-after-free Read in decode_session6

[Xin Long]

On Sun, Nov 1, 2020 at 1:40 PM syzbot
<syzbot+5be8aebb1b7dfa90ef31@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot has bisected this issue to:
>
> commit bcd623d8e9fa5f82bbd8cd464dc418d24139157b
> Author: Xin Long <lucien.xin@xxxxxxxxx>
> Date:   Thu Oct 29 07:05:05 2020 +0000
>
>     sctp: call sk_setup_caps in sctp_packet_transmit instead
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14df9cb8500000
> start commit:   68bb4665 Merge branch 'l2-multicast-forwarding-for-ocelot-..
> git tree:       net-next
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=16df9cb8500000
> console output: https://syzkaller.appspot.com/x/log.txt?x=12df9cb8500000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=eac680ae76558a0e
> dashboard link: https://syzkaller.appspot.com/bug?extid=5be8aebb1b7dfa90ef31
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11286398500000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11bbf398500000
>
> Reported-by: syzbot+5be8aebb1b7dfa90ef31@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: bcd623d8e9fa ("sctp: call sk_setup_caps in sctp_packet_transmit instead")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
I'm looking into this, Thanks.