syzbot has bisected this issue to:
commit e420bed025071a623d2720a92bc2245c84757ecb
Author: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Date: Wed Jul 19 14:08:52 2023 +0000
bpf: Add fd-based tcx multi-prog infra with link support
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=116ab4b6680000
start commit: a59addacf899 drivers/net: process the result of hdlc_open(..
git tree: net
final oops: https://syzkaller.appspot.com/x/report.txt?x=136ab4b6680000
console output: https://syzkaller.appspot.com/x/log.txt?x=156ab4b6680000
kernel config: https://syzkaller.appspot.com/x/.config?x=d594086f139d167
dashboard link: https://syzkaller.appspot.com/bug?extid=b97d20ed568ce0951a06
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10dc3946680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=107f4e1e680000
Reported-by: syzbot+b97d20ed568ce0951a06@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: e420bed02507 ("bpf: Add fd-based tcx multi-prog infra with link support")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
