syzbot has bisected this issue to:
commit 2030043e616cab40f510299f09b636285e0a3678
Author: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Date: Fri May 21 11:57:20 2021 +0000
can: j1939: fix Use-after-Free, hold skb ref while in use
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1438c947680000
start commit: 1b907d050735 Merge tag '6.7-rc-smb3-client-fixes-part2' of..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=1638c947680000
console output: https://syzkaller.appspot.com/x/log.txt?x=1238c947680000
kernel config: https://syzkaller.appspot.com/x/.config?x=88e7ba51eecd9cd6
dashboard link: https://syzkaller.appspot.com/bug?extid=1591462f226d9cbf0564
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17fea8fb680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1633dc70e80000
Reported-by: syzbot+1591462f226d9cbf0564@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 2030043e616c ("can: j1939: fix Use-after-Free, hold skb ref while in use")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
