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SubjectRe: KASAN: use-after-free Read in decode_session6
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syzbot has bisected this issue to:

commit bcd623d8e9fa5f82bbd8cd464dc418d24139157b
Author: Xin Long <lucien.xin@gmail.com>
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@syzkaller.appspotmail.com
Fixes: bcd623d8e9fa ("sctp: call sk_setup_caps in sctp_packet_transmit instead")

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

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