INFO: rcu detected stall in ext4_file_write_iter
Status: upstream: reported C repro on 2019/02/26 06:50
First crash: 530d, last: 18d

Cause bisection: the bug happens on the oldest tested release
Crash: INFO: rcu detected stall in ext4_file_write_iter (log)
Repro: C syz .config
similar bugs (3):
Kernel Title Repro Bisected Count Last Reported Patched Status
android-49 INFO: rcu detected stall in ext4_file_write_iter syz 2 395d 436d 0/3 public: reported syz repro on 2019/04/23 08:58
linux-4.14 INFO: rcu detected stall in ext4_file_write_iter C 7 4d15h 446d 0/1 upstream: reported C repro on 2019/04/12 16:30
linux-4.19 INFO: rcu detected stall in ext4_file_write_iter C 7 19d 439d 0/1 upstream: reported C repro on 2019/04/20 13:09

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro
ci-upstream-kasan-gce-smack-root 2020/05/21 03:02 upstream b85051e7 34bf9440 .config log report syz C
Crashes (82):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-smack-root 2019/06/22 20:00 upstream abf02e29 34bf9440 .config log report syz C,,
ci-upstream-kasan-gce-root 2019/05/03 16:28 upstream ea986679 1bfa09b9 .config log report syz C,,,,,,,,,,
ci-upstream-kasan-gce-root 2019/04/12 03:29 upstream 2d06b235 13030ef8 .config log report syz C,,,,,
ci-upstream-kasan-gce-selinux-root 2019/02/22 06:00 upstream 8a61716f 7ff74a98 .config log report syz C,,,
ci-upstream-linux-next-kasan-gce-root 2019/06/30 05:07 linux-next 48568d8c 7509bf36 .config log report syz C,,,
ci-upstream-kasan-gce-selinux-root 2020/05/23 21:45 upstream 423b8baf 9682898d .config log report,,
ci-upstream-kasan-gce-root 2020/04/21 02:39 upstream ae83d0b4 98a9f9e6 .config log report,,,
ci-upstream-kasan-gce-root 2020/04/18 08:08 upstream 95988fbc 435c6d53 .config log report,,
ci-upstream-kasan-gce-root 2020/04/02 21:11 upstream 7be97138 a34e2c33 .config log report,,,
ci-upstream-kasan-gce-root 2020/03/26 03:05 upstream 1b649e0b e8e6c7d2 .config log report,,
ci-upstream-kasan-gce-selinux-root 2020/03/19 18:23 upstream cd607737 2c31c529 .config log report,,
ci-upstream-kasan-gce-root 2020/03/11 09:50 upstream e9414845 35f53e45 .config log report,,
ci-upstream-kasan-gce-selinux-root 2020/03/04 15:44 upstream 63623fd4 c88c7b75 .config log report,,
ci-upstream-kasan-gce-selinux-root 2020/02/28 07:43 upstream f8788d86 59b57593 .config log report,,,
ci-upstream-kasan-gce-root 2020/02/17 15:26 upstream 11a48a5a 2b411596 .config log report,,,
ci-upstream-kasan-gce-selinux-root 2020/02/17 12:56 upstream 11a48a5a 2b411596 .config log report,,,
ci-upstream-kasan-gce-selinux-root 2020/02/15 22:49 upstream 829e6944 5d7b90f1 .config log report,,
ci-upstream-kasan-gce-smack-root 2020/02/12 14:36 upstream 359c92c0 84f4fc8a .config log report,,,
ci-upstream-kasan-gce-selinux-root 2020/02/12 03:58 upstream 359c92c0 a75b198c .config log report,,,
ci-upstream-kasan-gce-selinux-root 2020/02/11 15:39 upstream 0a679e13 4d1ab643 .config log report,,
ci-upstream-kasan-gce-root 2020/02/03 23:16 upstream 754beeec 93e5e335 .config log report,,
ci-upstream-kasan-gce-root 2020/01/12 22:47 upstream 6327edce 31290a45 .config log report,,
ci-upstream-kasan-gce-smack-root 2020/01/08 02:23 upstream ae608821 6738e0b3 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2020/01/08 01:13 upstream ae608821 6738e0b3 .config log report,,,,,,,,
ci-upstream-kasan-gce-root 2019/12/25 18:45 upstream 46cf053e be5c2c81 .config log report,,
ci-upstream-kasan-gce-selinux-root 2019/12/21 11:32 upstream 6398b9fc bc586918 .config log report,,
ci-upstream-kasan-gce-smack-root 2019/12/03 09:47 upstream 596cf45c ab342da3 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2019/12/02 23:38 upstream 596cf45c ab342da3 .config log report,,,,,,,,,,,,,,,
ci-upstream-kasan-gce-root 2019/07/20 15:14 upstream abdfd52a 1656845f .config log report
ci-upstream-kasan-gce-smack-root 2019/06/20 07:02 upstream abf02e29 34bf9440 .config log report,,
ci-upstream-kasan-gce-selinux-root 2019/06/14 09:21 upstream c11fb13a 998ccc76 .config log report,,,
ci-upstream-kasan-gce-smack-root 2019/06/14 09:19 upstream c11fb13a 998ccc76 .config log report,,,
ci-upstream-kasan-gce-root 2019/06/14 09:19 upstream c11fb13a 998ccc76 .config log report,,
ci-upstream-kasan-gce-root 2019/06/13 12:05 upstream b076173a 3f4e812b .config log report,,
ci-upstream-kasan-gce-selinux-root 2019/06/12 21:17 upstream 35110e38 794a1ad7 .config log report,,,,,,,,,
ci-upstream-kasan-gce-root 2019/06/12 12:28 upstream aa723548 794a1ad7 .config log report,,,,,,,,,,
ci-upstream-kasan-gce-root 2019/06/08 20:41 upstream 79c3ba32 0159583c .config log report,,,
ci-upstream-kasan-gce-smack-root 2019/03/25 05:14 upstream 8c2ffd91 2c86e0a5 .config log report,,,
ci-upstream-kasan-gce-selinux-root 2019/03/25 02:52 upstream 8c2ffd91 2c86e0a5 .config log report,,,
ci-upstream-kasan-gce-selinux-root 2019/03/24 07:56 upstream 1bdd3dbf a2cef203 .config log report,,,
ci-upstream-kasan-gce-root 2019/03/23 06:08 upstream fd1f297b 3361bde5 .config log report,,,
ci-upstream-kasan-gce-smack-root 2019/03/02 10:48 upstream a215ce8f 1c0e457a .config log report,,
ci-upstream-kasan-gce-selinux-root 2019/02/22 02:59 upstream 8a61716f 7ff74a98 .config log report,,,,,,,,
ci-upstream-kasan-gce-root 2019/02/19 10:23 upstream b5372fe5 59f36113 .config log report,,,,,,,,,
ci-upstream-kasan-gce-smack-root 2019/01/19 05:29 upstream 2339e91d 2103a236 .config log report,,,,,,,,,
ci-upstream-linux-next-kasan-gce-root 2020/06/13 19:36 linux-next e7b08814 dbce178a .config log report,,,
ci-upstream-linux-next-kasan-gce-root 2020/06/13 06:12 linux-next e7b08814 f4724dd3 .config log report,,,
ci-upstream-linux-next-kasan-gce-root 2020/04/14 14:59 linux-next f19bb13a 3f3c5574 .config log report,,,
ci-upstream-linux-next-kasan-gce-root 2020/03/09 22:00 linux-next 770fbb32 35f53e45 .config log report,,
ci-upstream-linux-next-kasan-gce-root 2020/02/18 07:04 linux-next c25a951c 1ce142dc .config log report,,
ci-upstream-linux-next-kasan-gce-root 2020/02/16 03:06 linux-next 9f01828e 5d7b90f1 .config log report,,
ci-upstream-linux-next-kasan-gce-root 2020/02/06 18:46 linux-next a0c61bf1 c91cbc9d .config log report,,
ci-upstream-linux-next-kasan-gce-root 2019/07/20 01:36 linux-next 6d21a41b 1656845f .config log report
ci-upstream-linux-next-kasan-gce-root 2019/07/02 08:57 linux-next 48a8a5f9 cccc4302 .config log report,,,,,,,,
ci-upstream-linux-next-kasan-gce-root 2019/06/23 05:58 linux-next dc636f5d 34bf9440 .config log report,,,
ci-upstream-linux-next-kasan-gce-root 2019/06/17 14:26 linux-next a125097c 442206d7 .config log report,,,,,,,,,,,,
ci-upstream-linux-next-kasan-gce-root 2019/06/12 12:28 linux-next 81a72c79 794a1ad7 .config log report,,,