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unregister_netdevice: waiting for DEV to become free (2)
Status: upstream: reported C repro on 2018/08/15 18:50
Reported-by: syzbot+30209ea299c09d8785c9@syzkaller.appspotmail.com
Fix commit: ddd9b5e3 net-sysfs: Call dev_hold always in rx_queue_add_kobject
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 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-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-usb], missing on: [ci2-upstream-kcsan-gce]
First crash: 529d, last: 4h47m

Cause bisection: the bug happens on the oldest tested release
Crash: possible deadlock in start_sync_thread (log)
Repro: C syz .config
similar bugs (6):
Kernel Title Repro Bisected Count Last Reported Patched Status
upstream unregister_netdevice: waiting for DEV to become free C 170521 529d 640d 9/16 fixed on 2018/08/08 18:10
linux-4.14 unregister_netdevice: waiting for DEV to become free C 83 9d07h 275d 0/1 upstream: reported C repro on 2019/04/20 01:33
android-49 unregister_netdevice: waiting for DEV to become free C 52164 56d 283d 0/3 public: reported C repro on 2019/04/11 08:44
android-44 unregister_netdevice: waiting for DEV to become free C 4307 118d 283d 0/2 public: reported C repro on 2019/04/11 08:44
android-414 unregister_netdevice: waiting for DEV to become free 1231 59d 282d 0/1 public: reported on 2019/04/13 00:01
linux-4.19 unregister_netdevice: waiting for DEV to become free C 203 14h16m 284d 0/1 upstream: reported C repro on 2019/04/10 19:11

Sample crash report:

Crashes (385082):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro
ci-upstream-kasan-gce-selinux-root 2019/10/24 16:04 upstream f116b966 d01bb02a .config log report syz C
ci-upstream-kasan-gce-smack-root 2019/10/19 06:36 upstream b9959c7a 8c88c9c1 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/10/12 06:29 upstream 9e208aa0 426631dd .config log report syz C
ci-upstream-kasan-gce-root 2019/10/08 21:41 upstream eda57a0e b1ebbfef .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/09/29 21:04 upstream 02dc96ef c1ad5441 .config log report syz C
ci-upstream-kasan-gce-root 2019/09/29 04:08 upstream f1f2f614 eb6b9855 .config log report syz C
ci-upstream-kasan-gce-smack-root 2019/09/20 03:04 upstream 3c2edc36 4d3ae0b7 .config log report syz C
ci-upstream-kasan-gce-root 2019/06/16 12:14 upstream e01e060f 442206d7 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/06/16 08:51 upstream e01e060f 442206d7 .config log report syz C
ci-upstream-kasan-gce 2019/02/25 18:22 upstream 5908e6b7 a70141bf .config log report syz C
ci-upstream-kasan-gce-smack-root 2019/02/25 18:21 upstream 5908e6b7 a70141bf .config log report syz C
ci-upstream-kasan-gce-root 2019/02/19 17:27 upstream b5372fe5 4df543c9 .config log report syz C
ci-upstream-kasan-gce-386 2019/02/25 18:21 upstream 5908e6b7 a70141bf .config log report syz C
ci-upstream-kasan-gce-386 2019/02/19 21:32 upstream b5372fe5 4df543c9 .config log report syz C
ci-upstream-bpf-kasan-gce 2019/06/16 08:33 bpf fe8d9571 442206d7 .config log report syz C
ci-upstream-net-kasan-gce 2019/08/21 13:51 net-next ac2eb56e 4ea67ff8 .config log report syz C
ci-upstream-net-kasan-gce 2019/08/20 19:51 net-next 932630fa cfc9868f .config log report syz C
ci-upstream-bpf-next-kasan-gce 2019/06/16 07:59 bpf-next 7f94208c 442206d7 .config log report syz C
ci-upstream-net-kasan-gce 2019/05/25 17:20 net-next af5136f9 85c57315 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/11/01 12:59 linux-next 49afce6d a41ca8fa .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/10/12 07:03 linux-next 8ada228a 426631dd .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/10/10 04:49 linux-next 1ba4389f c4b9981b .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/10/02 15:22 linux-next a32db7e1 2e29b534 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/09/25 00:56 linux-next 9e88347d 0942eab8 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/08/25 01:01 linux-next 9733a7c6 d21c5d9d .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/08/21 07:18 linux-next 54c851a8 4ea67ff8 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2018/08/20 04:30 linux-next d7857ae4 2dc4378f .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/10/05 22:26 upstream 4ea65534 f3f7d9c8 .config log report syz
ci-upstream-kasan-gce-root 2019/10/04 06:35 upstream cc3a7bfe fc17ba49 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/10/03 15:59 upstream 0f1a7b3f fc17ba49 .config log report syz
ci-upstream-kasan-gce-root 2019/10/01 06:08 upstream 54ecb8f7 c7a4fb99 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/09/30 15:35 upstream 97f9a3c4 c7a4fb99 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/09/26 00:02 upstream f41def39 a3355dba .config log report syz
ci-upstream-kasan-gce-smack-root 2019/09/24 10:55 upstream e94f8ccd c68252d2 .config log report syz
ci-upstream-kasan-gce-root 2018/08/15 20:27 upstream 31130a16 9ccc1d45 .config log report syz
ci-upstream-net-this-kasan-gce 2019/09/23 01:17 net 24ccb0ab d96e88f3 .config log report syz
ci-upstream-net-this-kasan-gce 2019/09/21 13:10 net e84622ce d96e88f3 .config log report syz
ci-upstream-net-kasan-gce 2019/09/28 03:09 net-next b41dae06 d8074e0b .config log report syz
ci-upstream-net-kasan-gce 2019/09/26 10:06 net-next b41dae06 24d405a3 .config log report syz
ci-upstream-net-kasan-gce 2019/09/22 22:55 net-next b41dae06 d96e88f3 .config log report syz
ci-upstream-net-kasan-gce 2019/09/21 15:26 net-next b41dae06 d96e88f3 .config log report syz
ci-upstream-net-kasan-gce 2019/05/26 13:04 net-next 22942498 85c57315 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/09/29 10:08 linux-next bb2aee77 c1ad5441 .config log report syz
ci-upstream-kasan-gce-selinux-root 2020/01/07 01:55 upstream ec7b3f53 53430d97 .config log report
ci-upstream-kasan-gce-root 2019/12/22 05:26 upstream b8e382a1 bc586918 .config log report
ci-upstream-kasan-gce 2019/12/20 10:43 upstream 7e0165b2 e30cbdae .config log report
ci-upstream-kasan-gce-smack-root 2019/11/30 06:28 upstream 81b6b964 3a75be00 .config log report
ci-upstream-kasan-gce 2018/08/08 18:38 upstream 1236568e ddeb9f8d .config log report
ci-upstream-kasan-gce-386 2019/09/08 02:19 upstream b3a9964c a60cb4cd .config log report
ci-upstream-net-this-kasan-gce 2020/01/19 16:08 net 09d4f10a 0342f8c7 .config log report
ci-upstream-net-this-kasan-gce 2020/01/18 18:05 net e02d9c4c 3de7aabb .config log report
ci-upstream-net-this-kasan-gce 2020/01/17 20:23 net 5a9ef194 3de7aabb .config log report
ci-upstream-net-this-kasan-gce 2020/01/16 16:57 net 567110f1 3de7aabb .config log report
ci-upstream-net-this-kasan-gce 2020/01/16 12:31 net 567110f1 3de7aabb .config log report
ci-upstream-net-this-kasan-gce 2020/01/16 03:06 net 8b792f84 f9b69507 .config log report
ci-upstream-net-this-kasan-gce 2020/01/15 16:02 net 8c4df83f 069a5a44 .config log report
ci-upstream-net-this-kasan-gce 2020/01/14 19:55 net f8d7408a fa12bd3c .config log report
ci-upstream-net-this-kasan-gce 2020/01/14 18:11 net a112adaf 32881205 .config log report
ci-upstream-net-this-kasan-gce 2020/01/14 17:08 net a112adaf 32881205 .config log report
ci-upstream-net-this-kasan-gce 2020/01/14 04:03 net a112adaf 32881205 .config log report
ci-upstream-net-this-kasan-gce 2020/01/13 11:38 net c9f53049 99565c1a .config log report
ci-upstream-net-this-kasan-gce 2020/01/12 23:32 net c9f53049 53faa9fe .config log report
ci-upstream-net-this-kasan-gce 2020/01/12 04:09 net c9f53049 4c04afaa .config log report
ci-upstream-net-this-kasan-gce 2020/01/11 11:39 net a5c3a7c0 4c04afaa .config log report
ci-upstream-net-this-kasan-gce 2020/01/11 05:44 net e267371d 4de4e9f0 .config log report
ci-upstream-net-this-kasan-gce 2020/01/10 12:21 net e267371d 4de4e9f0 .config log report
ci-upstream-net-this-kasan-gce 2020/01/10 07:29 net e267371d 4de4e9f0 .config log report
ci-upstream-net-this-kasan-gce 2020/01/10 06:26 net 9546a0b7 4de4e9f0 .config log report
ci-upstream-bpf-kasan-gce 2019/12/20 01:16 bpf ca8d0fa7 36650b4b .config log report
ci-upstream-net-kasan-gce 2020/01/20 00:50 net-next 7f013ede 0342f8c7 .config log report
ci-upstream-net-kasan-gce 2020/01/19 13:09 net-next 9aaa2949 bc8bc756 .config log report
ci-upstream-net-kasan-gce 2020/01/19 08:01 net-next 9aaa2949 bc8bc756 .config log report
ci-upstream-net-kasan-gce 2020/01/18 23:00 net-next 9aaa2949 bc8bc756 .config log report
ci-upstream-net-kasan-gce 2020/01/17 06:31 net-next 6bc80380 3de7aabb .config log report
ci-upstream-net-kasan-gce 2020/01/13 19:47 net-next e07c5f2e 99565c1a .config log report
ci-upstream-net-kasan-gce 2020/01/13 16:30 net-next e07c5f2e 99565c1a .config log report
ci-upstream-net-kasan-gce 2020/01/12 22:27 net-next a442c2c3 31290a45 .config log report
ci-upstream-net-kasan-gce 2020/01/12 17:17 net-next 5c9166f0 31290a45 .config log report
ci-upstream-net-kasan-gce 2020/01/12 15:39 net-next 5c9166f0 31290a45 .config log report
ci-upstream-net-kasan-gce 2020/01/12 00:17 net-next 6821af8b 4c04afaa .config log report
ci-upstream-net-kasan-gce 2020/01/11 23:09 net-next 6821af8b 4c04afaa .config log report
ci-upstream-net-kasan-gce 2020/01/11 08:34 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/11 06:46 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/11 04:21 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/11 03:12 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/11 01:13 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/10 22:26 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/10 21:16 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/10 19:18 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/10 18:11 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/10 15:50 net-next 9f120e76 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/10 04:14 net-next 4a4a52d4 4de4e9f0 .config log report
ci-upstream-net-kasan-gce 2020/01/10 02:56 net-next 4a4a52d4 4de4e9f0 .config log report
ci-upstream-bpf-next-kasan-gce 2019/12/24 08:32 bpf-next f9e6bfdb be5c2c81 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/01/14 10:10 linux-next 1b851f98 32881205 .config log report
ci-upstream-kmsan-gce 2018/09/04 13:20 https://github.com/google/kmsan.git master 28f0ca98 a4718693 .config log report