syzbot


INFO: task hung in d_alloc_parallel (2)
Status: upstream: reported C repro on 2019/10/22 22:44
Reported-by: syzbot+55f124a35eac76b52fb7@syzkaller.appspotmail.com
First crash: 699d, last: 96d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: task hung in lookup_slow (log)
Repro: C syz .config

Fix bisection: failed (bisect log)
similar bugs (5):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in d_alloc_parallel 85 648d 797d 0/3 auto-closed as invalid on 2020/01/08 20:52
linux-4.14 INFO: task hung in d_alloc_parallel C error 4 67d 676d 0/1 upstream: reported C repro on 2019/08/14 00:43
android-414 INFO: task hung in d_alloc_parallel 1 607d 607d 0/1 auto-closed as invalid on 2020/02/18 04:29
linux-4.19 INFO: task hung in d_alloc_parallel syz error 3 136d 414d 0/1 upstream: reported syz repro on 2020/05/01 20:49
upstream INFO: task hung in d_alloc_parallel 213 841d 1172d 0/22 closed as dup on 2018/09/08 15:40

Sample crash report:

Crashes (142):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/10/20 00:35 upstream 998d7551 8c88c9c1 .config log report syz C
ci-upstream-kasan-gce-root 2021/03/15 19:52 upstream 1e28eed1 fdb2bb2c .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/03/13 21:13 upstream f296bfd5 4a003785 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/03/13 21:03 upstream f296bfd5 4a003785 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/03/04 18:36 upstream f69d02e3 d7e4e604 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/02/22 13:33 upstream 31caf8b2 a659b3f1 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/02/20 21:56 upstream f40ddce8 3e5ed8b4 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/02/17 11:40 upstream f40ddce8 052f8d9f .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-smack-root 2021/02/17 10:37 upstream f40ddce8 052f8d9f .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-smack-root 2021/02/16 22:35 upstream f40ddce8 98682e5e .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/02/11 23:12 upstream 291009f6 a5f86b15 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/02/10 03:13 upstream e0756cfc 2bd9619f .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/02/10 00:30 upstream e0756cfc 2bd9619f .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/02/07 02:26 upstream 964d069f 0655e081 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/02/04 22:49 upstream 61556703 42b90a7c .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/02/04 22:22 upstream 61556703 42b90a7c .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/02/03 20:44 upstream 3aaf0a27 624dad51 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/02/03 07:08 upstream 3aaf0a27 624dad51 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/02/03 02:43 upstream 3aaf0a27 624dad51 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/01/31 10:14 upstream 8c947645 fc9fd31e .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/01/31 05:33 upstream 8c947645 fc9fd31e .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/01/29 20:01 upstream bec4c296 6593fd32 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-smack-root 2021/01/29 14:17 upstream bec4c296 6593fd32 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/01/29 13:07 upstream bec4c296 6593fd32 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/01/29 11:12 upstream bec4c296 6593fd32 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/01/28 03:52 upstream 76c057c8 eefc07f2 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/01/27 04:26 upstream 13391c60 55a7d4df .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/01/26 21:47 upstream 13391c60 55a7d4df .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/01/23 19:01 upstream fe75a218 52e37319 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce 2021/01/23 17:50 upstream fe75a218 52e37319 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/01/22 12:21 upstream 9f29bd8b d4f4eca5 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/01/20 00:50 upstream 1e2a199f 63631df1 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-smack-root 2021/01/19 15:35 upstream 1e2a199f 63631df1 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-smack-root 2021/01/18 10:22 upstream a1339d63 fd103621 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/01/18 07:13 upstream a1339d63 fd103621 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-smack-root 2021/01/18 05:31 upstream a1339d63 fd103621 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-root 2021/01/18 04:09 upstream a1339d63 fd103621 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-386 2021/02/11 23:05 upstream 291009f6 a5f86b15 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-386 2021/02/10 17:53 upstream e0756cfc 2bd9619f .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-386 2021/02/05 17:35 upstream dd86e7fa 23a562df .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-386 2021/02/04 14:52 upstream 61556703 42b90a7c .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-386 2021/02/03 15:59 upstream 3aaf0a27 624dad51 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-386 2021/01/19 13:36 upstream 1e2a199f 63631df1 .config log report info INFO: task hung in d_alloc_parallel
ci-upstream-kasan-gce-selinux-root 2021/01/15 05:57 upstream 14662050 65a7a854 .config log report info
ci-upstream-kasan-gce-smack-root 2021/01/15 02:02 upstream 65f0d241 65a7a854 .config log report info
ci-upstream-kasan-gce 2021/01/11 08:05 upstream 0653161f 2c1f2513 .config log report info
ci-upstream-kasan-gce-selinux-root 2021/01/09 03:32 upstream 6279d812 c104d4a3 .config log report info
ci-upstream-kasan-gce-smack-root 2019/07/21 13:08 upstream c6dd78fc 1656845f .config log report
ci-upstream-kasan-gce-386 2021/01/08 12:38 upstream f5e6c330 c104d4a3 .config log report info
ci-upstream-kasan-gce-386 2021/01/08 12:38 upstream f5e6c330 c104d4a3 .config log report info
ci-upstream-linux-next-kasan-gce-root 2019/09/16 02:12 linux-next 6d028043 32d59357 .config log report