syzbot


WARNING: ODEBUG bug in qdisc_create
Status: internal: reported C repro on 2021/08/24 08:39
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: a56d447f196f net/sched: sch_taprio: properly cancel timer from taprio_destroy()
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 104d, last: 76d

Cause bisection: introduced by (bisect log) :
commit 44d4775ca51805b376a8db5b34f650434a08e556
Author: Davide Caratti <dcaratti@redhat.com>
Date: Wed Dec 16 18:33:29 2020 +0000

  net/sched: sch_taprio: reset child qdiscs before freeing them

Crash: WARNING: ODEBUG bug in qdisc_create (log)
Repro: C syz .config

Sample crash report:

Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/09/21 05:30 upstream e8f71f89236e af796c18 .config log report syz C WARNING: ODEBUG bug in qdisc_create
ci-upstream-net-this-kasan-gce 2021/08/24 20:20 net 3b0720ba00a7 b599f2fc .config log report syz C WARNING: ODEBUG bug in qdisc_create
ci-upstream-net-kasan-gce 2021/08/24 19:52 net-next faf482ca196a b599f2fc .config log report syz C WARNING: ODEBUG bug in qdisc_create
ci-upstream-net-kasan-gce 2021/09/16 11:21 net-next 5706383b30cf 07e953c1 .config log report info WARNING: ODEBUG bug in qdisc_create
ci-upstream-net-kasan-gce 2021/08/24 19:29 net-next faf482ca196a b599f2fc .config log report info WARNING: ODEBUG bug in qdisc_create
ci-upstream-net-kasan-gce 2021/08/24 08:38 net-next f6a4e0e8a00f b599f2fc .config log report info WARNING: ODEBUG bug in qdisc_create