syzbot


INFO: task hung in synchronize_rcu
Status: fixed on 2019/11/29 15:48
Reported-by: syzbot+89a8060879fa0bd2db4f@syzkaller.appspotmail.com
Fix commit: 8a44119a98be KVM: Fix NULL-ptr deref after kvm_create_vm fails
First crash: 766d, last: 735d

Cause bisection: introduced by (bisect log) :
commit 9121923c457d1d8667a6e3a67302c29e5c5add6b
Author: Jim Mattson <jmattson@google.com>
Date: Thu Oct 24 23:03:26 2019 +0000

  kvm: Allocate memslots and buses before calling kvm_arch_init_vm

Crash: general protection fault in kvm_coalesced_mmio_init (log)
Repro: syz .config
similar bugs (6):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in synchronize_rcu (3) C done 321 19d 498d 0/22 upstream: reported C repro on 2020/07/22 18:22
android-49 INFO: task hung in synchronize_rcu 1 735d 734d 0/3 auto-closed as invalid on 2020/03/28 16:57
linux-4.14 INFO: task hung in synchronize_rcu C error 116 47d 757d 0/1 upstream: reported C repro on 2019/11/07 04:32
linux-4.19 INFO: task hung in synchronize_rcu 31 3d14h 755d 0/1 upstream: reported on 2019/11/08 21:27
android-414 INFO: task hung in synchronize_rcu 1 753d 753d 0/1 auto-closed as invalid on 2020/03/10 10:42
upstream INFO: task hung in synchronize_rcu (2) 8 734d 734d 0/22 closed as invalid on 2019/11/30 16:54

Sample crash report:

Crashes (1206):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/11/13 06:39 upstream 100d46bd72ec 048f2d49 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/13 05:16 upstream 100d46bd72ec 048f2d49 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/13 04:42 upstream 100d46bd72ec 048f2d49 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/13 02:36 upstream 100d46bd72ec 048f2d49 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/13 00:34 upstream 100d46bd72ec 048f2d49 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/11 03:28 upstream 9805a68371ce dc438b91 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/10 15:24 upstream 00aff6836241 dc438b91 .config log report syz
ci-upstream-kasan-gce-root 2019/11/10 13:14 upstream 00aff6836241 dc438b91 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/10 11:45 upstream 00aff6836241 dc438b91 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/09 23:30 upstream 0058b0a506e4 dc438b91 .config log report syz
ci-upstream-kasan-gce-root 2019/11/09 19:21 upstream 0058b0a506e4 dc438b91 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/09 18:59 upstream 0058b0a506e4 dc438b91 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/09 12:19 upstream 6737e7634951 dc438b91 .config log report syz
ci-upstream-kasan-gce-root 2019/11/09 11:20 upstream 6737e7634951 dc438b91 .config log report syz
ci-upstream-kasan-gce-root 2019/11/09 04:01 upstream 6737e7634951 dc438b91 .config log report syz
ci-upstream-kasan-gce-root 2019/11/08 19:45 upstream 847120f859cc 1e35461e .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/08 19:05 upstream 847120f859cc 1e35461e .config log report syz
ci-upstream-kasan-gce-root 2019/11/08 03:56 upstream 847120f859cc f39aff9e .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/07 22:37 upstream 4dd58158254c f39aff9e .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/07 02:45 upstream 26bc67213424 da505f84 .config log report syz
ci-upstream-kasan-gce-root 2019/11/06 20:30 upstream 26bc67213424 da505f84 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/06 10:20 upstream 26bc67213424 bc2c6e45 .config log report syz
ci-upstream-kasan-gce-root 2019/11/06 09:17 upstream 26bc67213424 bc2c6e45 .config log report syz
ci-upstream-kasan-gce-root 2019/11/05 22:50 upstream a99d8080aaf3 0f3ec414 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/05 19:34 upstream a99d8080aaf3 0f3ec414 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/05 11:39 upstream a99d8080aaf3 76630fc9 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/05 10:12 upstream a99d8080aaf3 76630fc9 .config log report syz
ci-upstream-kasan-gce-root 2019/11/05 08:26 upstream a99d8080aaf3 76630fc9 .config log report syz
ci-upstream-kasan-gce-root 2019/11/05 02:36 upstream a99d8080aaf3 76630fc9 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/04 12:16 upstream a99d8080aaf3 b35fad31 .config log report syz
ci-upstream-kasan-gce-root 2019/11/04 11:02 upstream a99d8080aaf3 b35fad31 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/04 08:59 upstream a99d8080aaf3 b35fad31 .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/03 21:05 upstream 56cfd2507d3e c9610487 .config log report syz
ci-upstream-kasan-gce-root 2019/11/03 12:11 upstream 9d2345057538 a41ca8fa .config log report syz
ci-upstream-kasan-gce-root 2019/11/03 09:43 upstream 9d2345057538 a41ca8fa .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/03 09:12 upstream 9d2345057538 a41ca8fa .config log report syz
ci-upstream-kasan-gce-smack-root 2019/11/03 09:08 upstream 9d2345057538 a41ca8fa .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/11/03 05:45 upstream 9d2345057538 a41ca8fa .config log report syz
ci-upstream-kasan-gce-386 2019/11/03 10:45 upstream 9d2345057538 a41ca8fa .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/11/07 22:34 linux-next c68c5373c504 f39aff9e .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/11/07 17:30 linux-next c68c5373c504 d797d201 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/11/05 16:22 linux-next 51309b9d73f5 0f3ec414 .config log report syz
ci-qemu-upstream 2019/11/29 12:28 upstream 81b6b96475ac d29b9e84 .config log report
ci-upstream-kasan-gce-root 2019/11/25 21:53 upstream 219d54332a09 371caf77 .config log report
ci-upstream-kasan-gce 2019/11/23 07:37 upstream a6b0373ffcd8 598ca6c8 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/18 23:11 upstream af42d3466bdc 1daed50a .config log report
ci-upstream-kasan-gce-root 2019/11/17 05:14 upstream fe30021c36fb d5696d51 .config log report
ci-upstream-kasan-gce 2019/11/13 08:09 upstream 100d46bd72ec 048f2d49 .config log report
ci-upstream-kasan-gce-root 2019/11/13 06:22 upstream eb094f06963b 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/13 04:05 upstream 100d46bd72ec 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/13 02:25 upstream 100d46bd72ec 048f2d49 .config log report
ci-upstream-kasan-gce-selinux-root 2019/11/12 23:33 upstream 100d46bd72ec 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/12 23:16 upstream 100d46bd72ec 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/12 21:33 upstream 100d46bd72ec 048f2d49 .config log report
ci-upstream-kasan-gce-selinux-root 2019/11/12 20:32 upstream 100d46bd72ec 048f2d49 .config log report
ci-upstream-kasan-gce-selinux-root 2019/11/12 19:14 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-root 2019/11/12 17:28 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-selinux-root 2019/11/12 17:17 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-root 2019/11/12 16:11 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/12 15:00 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/12 14:45 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/12 13:43 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/12 12:38 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/12 10:31 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/12 09:28 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-root 2019/11/12 09:06 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-root 2019/11/12 07:46 upstream de620fb99ef2 048f2d49 .config log report
ci-upstream-kasan-gce-selinux-root 2019/11/12 06:07 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/12 03:15 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/12 02:13 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/12 00:58 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/11 23:53 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/11 22:16 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce-root 2019/11/11 20:13 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce 2019/11/11 19:08 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/11 18:06 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce-selinux-root 2019/11/11 16:17 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/11 15:06 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/11 15:06 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce 2019/11/11 13:53 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce-root 2019/11/11 12:43 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce-root 2019/11/11 11:21 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/11 10:20 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce 2019/11/11 08:53 upstream 9805a68371ce dc438b91 .config log report
ci-upstream-kasan-gce-386 2019/11/13 04:06 upstream eb094f06963b 048f2d49 .config log report
ci-upstream-kasan-gce-386 2019/11/12 01:03 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-kasan-gce-386 2019/11/11 21:15 upstream 31f4f5b495a6 048f2d49 .config log report
ci-upstream-bpf-kasan-gce 2019/11/19 04:29 bpf 34e59836565e 5bc70212 .config log report
ci-upstream-net-kasan-gce 2019/11/24 04:28 net-next 8dcdc9524cad 598ca6c8 .config log report
ci-upstream-net-kasan-gce 2019/10/29 08:01 net-next d5a721c96a44 5ea87a66 .config log report
ci-upstream-linux-next-kasan-gce-root 2019/11/12 11:35 linux-next fc6d6db1df2c 048f2d49 .config log report
ci-upstream-linux-next-kasan-gce-root 2019/11/12 04:41 linux-next 6980b7f6f9db 048f2d49 .config log report
ci-upstream-linux-next-kasan-gce-root 2019/11/12 03:25 linux-next 6980b7f6f9db 048f2d49 .config log report