syzbot


WARNING in gnet_stats_add_basic
Status: internal: reported C repro on 2021/10/18 12:28
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: e22db7bd552f net: sched: Allow statistics reads from softirq.
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: 49d, last: 48d

Cause bisection: introduced by (bisect log) :
commit 29cbcd85828372333aa87542c51f2b2b0fd4380c
Author: Ahmed S. Darwish <a.darwish@linutronix.de>
Date: Sat Oct 16 08:49:10 2021 +0000

  net: sched: Remove Qdisc::running sequence counter

Crash: WARNING in gnet_stats_add_basic (log)
Repro: C syz .config

Sample crash report:

Crashes (14):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-kasan-gce 2021/10/19 05:01 net-next f616447034a1 24dc29db .config log report syz C WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/19 04:36 net-next f616447034a1 24dc29db .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/19 01:33 net-next f616447034a1 24dc29db .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 15:23 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 15:18 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 15:12 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 15:04 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 14:25 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 14:16 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 14:10 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 13:18 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 13:02 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 12:55 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic
ci-upstream-net-kasan-gce 2021/10/18 12:27 net-next d40dfa0cebd8 0c5d9412 .config log report info WARNING in gnet_stats_add_basic