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unregister_netdevice: waiting for DEV to become free (4)
Status: upstream: reported C repro on 2020/08/19 13:54
Reported-by: syzbot+df400f2f24a1677cd7e0@syzkaller.appspotmail.com
First crash: 166d, last: 17m

Cause bisection: introduced by (bisect log):

commit 449325b52b7a6208f65ed67d3484fd7b7184477b
Author: Alexei Starovoitov <ast@kernel.org>
Date: Tue May 22 02:22:29 2018 +0000

  umh: introduce fork_usermode_blob() helper

Crash: KASAN: use-after-free Write in call_usermodehelper_exec_work (log)
Repro: C syz .config
similar bugs (9):
Kernel Title Repro Bisected Count Last Reported Patched Status
upstream unregister_netdevice: waiting for DEV to become free (3) C 1864 166d 228d 17/17 fixed on 2020/04/15 17:19
upstream unregister_netdevice: waiting for DEV to become free C 170521 782d 893d 9/17 fixed on 2018/08/08 18:10
linux-4.14 unregister_netdevice: waiting for DEV to become free C fix 120 89d 528d 1/1 fixed on 2020/08/02 06:53
android-49 unregister_netdevice: waiting for DEV to become free C 52164 309d 536d 0/3 public: reported C repro on 2019/04/11 08:44
android-44 unregister_netdevice: waiting for DEV to become free C 4307 371d 536d 0/2 public: reported C repro on 2019/04/11 08:44
linux-4.14 unregister_netdevice: waiting for DEV to become free (2) 13 2d17h 46d 0/1 upstream: reported on 2020/08/13 09:52
android-414 unregister_netdevice: waiting for DEV to become free 1231 312d 535d 0/1 auto-closed as invalid on 2020/02/19 10:10
upstream unregister_netdevice: waiting for DEV to become free (2) C cause 385621 228d 775d 16/17 fixed on 2020/02/14 01:19
linux-4.19 unregister_netdevice: waiting for DEV to become free C 1247 5h37m 537d 0/1 upstream: reported C repro on 2019/04/10 19:11

Sample crash report:

Crashes (6714):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info
ci-upstream-kasan-gce-selinux-root 2020/09/03 20:51 upstream fc3abb53 abf9ba4f .config log report syz C
ci-upstream-kasan-gce 2020/09/01 13:55 upstream b51594df d5a3ae1f .config log report syz C
ci-upstream-kasan-gce-root 2020/08/31 06:34 upstream dcc5c6f0 d5a3ae1f .config log report syz C
ci-upstream-kasan-gce-root 2020/08/21 08:57 upstream da2968ff 1d75fe45 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/08/20 10:13 upstream 7eac66d0 ed282a3a .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/08/19 07:20 upstream 18445bf4 e1c29030 .config log report syz C
ci-upstream-kasan-gce-386 2020/08/31 14:28 upstream dcc5c6f0 d5a3ae1f .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/09/05 23:45 linux-next 7a695657 abf9ba4f .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/08/22 13:01 linux-next 494d311a 6436ce4b .config log report syz C
ci-upstream-kasan-gce 2020/09/29 05:26 upstream fb0155a0 1b88c6d5 .config log report info
ci-upstream-kasan-gce 2020/09/29 02:24 upstream fb0155a0 1b88c6d5 .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/28 18:56 upstream a1b8638b 6bfdbe89 .config log report info
ci-upstream-kasan-gce 2020/09/28 16:03 upstream a1b8638b 6bfdbe89 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/28 13:30 upstream a1b8638b 6bfdbe89 .config log report info
ci-upstream-kasan-gce-root 2020/09/28 12:25 upstream a1b8638b 6bfdbe89 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/28 11:25 upstream a1b8638b 6bfdbe89 .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/28 10:14 upstream a1b8638b 6bfdbe89 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/28 02:02 upstream 16bc1d54 5dd8aee8 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/27 23:54 upstream 16bc1d54 5dd8aee8 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/27 16:31 upstream a1bffa48 5dd8aee8 .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/27 07:12 upstream eeddbe68 5dd8aee8 .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/27 07:02 upstream eeddbe68 5dd8aee8 .config log report info
ci-upstream-kasan-gce-root 2020/09/27 03:36 upstream eeddbe68 2d5ea0cb .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/27 01:29 upstream eeddbe68 2d5ea0cb .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/27 01:17 upstream eeddbe68 2d5ea0cb .config log report info
ci-upstream-kasan-gce-root 2020/09/27 00:13 upstream eeddbe68 2d5ea0cb .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/26 13:46 upstream 7c7ec322 2d5ea0cb .config log report info
ci-upstream-kasan-gce-root 2020/09/26 08:36 upstream 7c7ec322 4a006f63 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/26 06:05 upstream 7c7ec322 4a006f63 .config log report info
ci-qemu-upstream 2020/09/23 19:40 upstream 805c6d3c 54289b08 .config log report info
ci-upstream-kasan-gce-386 2020/09/29 03:46 upstream fb0155a0 1b88c6d5 .config log report info
ci-qemu-upstream-386 2020/09/28 17:37 upstream a4d63c37 6bfdbe89 .config log report info
ci-qemu-upstream-386 2020/09/28 10:24 upstream a1b8638b 6bfdbe89 .config log report info
ci-upstream-kasan-gce-386 2020/09/27 08:23 upstream a1bffa48 5dd8aee8 .config log report info
ci-upstream-kasan-gce-386 2020/09/26 16:18 upstream 7c7ec322 2d5ea0cb .config log report info
ci-upstream-kasan-gce-386 2020/09/26 14:58 upstream 7c7ec322 2d5ea0cb .config log report info
ci-upstream-bpf-kasan-gce 2020/09/28 07:50 bpf 87f92ac4 5dd8aee8 .config log report info
ci-upstream-net-this-kasan-gce 2020/09/28 00:55 net 307eea32 5dd8aee8 .config log report info
ci-upstream-bpf-kasan-gce 2020/09/27 13:06 bpf 87f92ac4 5dd8aee8 .config log report info
ci-upstream-net-this-kasan-gce 2020/09/26 23:11 net 5e46e43c 2d5ea0cb .config log report info
ci-upstream-net-this-kasan-gce 2020/09/26 13:55 net 5e46e43c 2d5ea0cb .config log report info
ci-upstream-net-kasan-gce 2020/09/29 01:17 net-next bcbf1be0 1b88c6d5 .config log report info
ci-upstream-net-kasan-gce 2020/09/29 00:36 net-next bcbf1be0 6bfdbe89 .config log report info
ci-upstream-net-kasan-gce 2020/09/28 23:25 net-next 0675c285 6bfdbe89 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/09/28 21:56 bpf-next ba5f4cfe 6bfdbe89 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/09/28 20:05 bpf-next ba5f4cfe 6bfdbe89 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/09/28 14:56 bpf-next ba5f4cfe 6bfdbe89 .config log report info
ci-upstream-net-kasan-gce 2020/09/28 09:10 net-next 0675c285 6bfdbe89 .config log report info
ci-upstream-net-kasan-gce 2020/09/28 04:39 net-next 090bc03b 5dd8aee8 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/09/28 03:40 bpf-next ba5f4cfe 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/09/27 23:37 net-next 090bc03b 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/09/27 22:25 net-next 435be28b 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/09/27 19:58 net-next 435be28b 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/09/27 18:46 net-next 435be28b 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/09/27 14:37 net-next 435be28b 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/09/27 05:47 net-next 435be28b 5dd8aee8 .config log report info
ci-upstream-net-kasan-gce 2020/09/26 22:02 net-next 6fba737a 2d5ea0cb .config log report info
ci-upstream-net-kasan-gce 2020/09/26 21:44 net-next 6fba737a 2d5ea0cb .config log report info
ci-upstream-net-kasan-gce 2020/09/26 20:22 net-next 6fba737a 2d5ea0cb .config log report info
ci-upstream-bpf-next-kasan-gce 2020/09/26 11:04 bpf-next ba5f4cfe 4a006f63 .config log report info
ci-upstream-net-kasan-gce 2020/09/26 07:32 net-next 6fba737a 4a006f63 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/09/26 04:02 bpf-next 182bf3f3 4a006f63 .config log report info
ci-upstream-net-kasan-gce 2020/04/15 18:45 net-next 63bef48f 3f3c5574 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/09/28 19:00 linux-next 663b07a4 6bfdbe89 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/09/28 06:48 linux-next d1d2220c 5dd8aee8 .config log report info