syzbot


INFO: task hung in tcf_action_init_1
Status: upstream: reported C repro on 2020/09/28 07:27
Reported-by: syzbot+82752bc5331601cf4899@syzkaller.appspotmail.com
Fix commit: d349f997 net_sched: fix RTNL deadlock again caused by request_module()
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 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-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-arm32 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 155d, last: 19d

Cause bisection: introduced by (bisect log) :
commit 0fedc63fadf0404a729e73a35349481c8009c02f
Author: Cong Wang <xiyou.wangcong@gmail.com>
Date: Wed Sep 23 03:56:24 2020 +0000

  net_sched: commit action insertions together

Crash: INFO: task hung in addrconf_dad_work (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2020/10/01 01:10 17m xiyou.wangcong@gmail.com https://github.com/congwang/linux.git net OK

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-this-kasan-gce 2021/01/07 08:56 net 1f685e6a d32b0bbf .config log report syz C
ci-upstream-net-this-kasan-gce 2020/12/07 01:16 net edd2410b d32b0bbf .config log report syz C
Crashes (30):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2021/02/09 10:19 upstream e0756cfc 2bd9619f .config log report syz C INFO: task hung in tcf_action_init_1
ci-upstream-kasan-gce-root 2021/02/07 17:52 upstream 825b5991 2ce644fc .config log report syz C INFO: task hung in tcf_action_init_1
ci-upstream-kasan-gce-smack-root 2021/02/05 06:36 upstream 5c279c4c 23a562df .config log report syz C INFO: task hung in tcf_action_init_1
ci-upstream-kasan-gce-root 2021/01/27 17:18 upstream 2ab38c17 a0ebf917 .config log report syz C INFO: task hung in tcf_action_init_1
ci-upstream-net-this-kasan-gce 2020/10/13 04:36 net 8098bd69 d32b0bbf .config log report syz C
ci-upstream-net-this-kasan-gce 2020/10/10 19:50 net 7b50ee3d 4a77ae0b .config log report syz C
ci-upstream-net-this-kasan-gce 2020/09/26 08:34 net 5e46e43c 4a006f63 .config log report syz C
ci-upstream-net-kasan-gce 2020/10/08 00:46 net-next 9faebeb2 1880b4a9 .config log report syz C
ci-upstream-net-kasan-gce 2020/10/06 22:27 net-next 8b0308fe 1880b4a9 .config log report syz C
ci-upstream-net-kasan-gce 2020/10/06 20:12 net-next 8b0308fe 1880b4a9 .config log report syz C
ci-upstream-net-kasan-gce 2020/10/06 17:28 net-next 8b0308fe 1880b4a9 .config log report syz C
ci-upstream-kasan-gce-root 2020/11/05 23:26 upstream 521b619a 64069d48 .config log report info
ci-upstream-kasan-gce-smack-root 2020/11/05 23:11 upstream 521b619a 64069d48 .config log report info
ci-upstream-kasan-gce-root 2020/10/30 17:19 upstream 07e08873 a6e3ac3b .config log report info
ci-upstream-kasan-gce-selinux-root 2020/10/12 22:35 upstream bbf5c979 d32b0bbf .config log report info
ci-upstream-kasan-gce-root 2020/10/06 02:19 upstream 7575fdda 1880b4a9 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/30 17:19 net 07e08873 a6e3ac3b .config log report info
ci-upstream-net-this-kasan-gce 2020/10/05 12:43 net 580e4273 5ef9c291 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/02 19:04 net ef9da46d 4969d6ca .config log report info
ci-upstream-net-this-kasan-gce 2020/10/02 04:15 net bb13a800 9602ddf4 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/02 00:32 net bb13a800 9602ddf4 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/01 15:16 net a59cf619 a9767fb2 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/01 08:47 net a59cf619 a9767fb2 .config log report info
ci-upstream-net-this-kasan-gce 2020/09/30 15:46 net 2b3e981a 8516f6d3 .config log report info
ci-upstream-net-this-kasan-gce 2020/09/28 19:40 net 709a16be 6bfdbe89 .config log report info
ci-upstream-net-this-kasan-gce 2020/09/27 15:35 net 05943249 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/10/15 22:29 net-next 346e320c 6e262c73 .config log report info
ci-upstream-net-kasan-gce 2020/10/07 01:15 net-next 8b0308fe 1880b4a9 .config log report info
ci-upstream-net-kasan-gce 2020/10/06 20:16 net-next 8b0308fe 1880b4a9 .config log report info
ci-upstream-net-kasan-gce 2020/10/06 13:33 net-next 8b0308fe 1880b4a9 .config log report info