syzbot


INFO: task hung in blkdev_put (4)
Status: upstream: reported C repro on 2020/10/03 13:09
Reported-by: syzbot+9a29d5e745bd7523c851@syzkaller.appspotmail.com
First crash: 230d, last: 6d03h

Cause bisection: introduced by (bisect log) :
commit 2da22da573481cc4837e246d0eee4d518b3f715e
Author: Mike Christie <mchristi@redhat.com>
Date: Tue Aug 13 16:39:52 2019 +0000

  nbd: fix zero cmd timeout handling v2

Crash: INFO: task hung in blkdev_put (log)
Repro: C syz .config
similar bugs (12):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in blkdev_put (3) 1 309d 309d 0/21 auto-closed as invalid on 2020/06/25 13:28
android-49 INFO: task hung in blkdev_put (2) 3 472d 492d 0/3 auto-closed as invalid on 2020/03/14 12:22
linux-4.19 INFO: task hung in blkdev_put C 10 5d23h 221d 0/1 upstream: reported C repro on 2020/07/23 21:33
upstream INFO: task hung in blkdev_put 320 751d 1177d 0/21 closed as dup on 2018/11/11 08:29
linux-4.14 INFO: task hung in blkdev_put 2 535d 684d 0/1 auto-closed as invalid on 2020/01/12 01:56
linux-4.14 INFO: task hung in blkdev_put (3) C 8 28d 183d 0/1 upstream: reported C repro on 2020/08/30 21:52
android-49 INFO: task hung in blkdev_put 220 670d 687d 0/3 auto-closed as invalid on 2019/10/25 08:47
linux-4.14 INFO: task hung in blkdev_put (2) 2 338d 376d 0/1 auto-closed as invalid on 2020/07/26 14:38
android-414 INFO: task hung in blkdev_put 119 457d 689d 0/1 auto-closed as invalid on 2020/03/30 04:06
android-44 INFO: task hung in blkdev_put 26 757d 687d 0/2 auto-closed as invalid on 2019/08/03 02:42
android-44 INFO: task hung in blkdev_put (2) 3 468d 545d 0/2 auto-closed as invalid on 2020/03/18 19:27
upstream INFO: task hung in blkdev_put (2) 2 464d 509d 0/21 auto-closed as invalid on 2020/02/22 04:07

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2021/01/19 15:55 upstream 1e2a199f 1b88c6d5 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/12/20 13:50 upstream 467f8165 1b88c6d5 .config log report syz C
Crashes (18):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2021/02/19 12:37 upstream f40ddce8 14052202 .config log report syz C INFO: task hung in blkdev_put
ci-upstream-kasan-gce-smack-root 2021/02/15 14:00 upstream f40ddce8 98682e5e .config log report syz C INFO: task hung in blkdev_put
ci-upstream-kasan-gce-root 2021/02/09 10:07 upstream e0756cfc 2bd9619f .config log report syz C INFO: task hung in blkdev_put
ci-upstream-linux-next-kasan-gce-root 2021/01/21 20:42 linux-next bc085f8f d4f4eca5 .config log report syz C INFO: task hung in blkdev_put
ci-upstream-kasan-gce-selinux-root 2020/09/29 13:03 upstream fb0155a0 1b88c6d5 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/10/30 23:57 linux-next 4e78c578 a6e3ac3b .config log report syz C
ci-upstream-kasan-gce-root 2021/02/24 02:32 upstream 3b9cdafb fcc6d71b .config log report info INFO: task hung in blkdev_put
ci-upstream-kasan-gce-smack-root 2021/02/19 12:57 upstream f40ddce8 14052202 .config log report info INFO: task hung in blkdev_put
ci-upstream-kasan-gce-smack-root 2021/01/21 01:31 upstream 75439bc4 d4f4eca5 .config log report info INFO: task hung in blkdev_put
ci-upstream-kasan-gce-selinux-root 2020/11/20 05:59 upstream 131ad0b6 0767f13f .config log report info
ci-upstream-kasan-gce-selinux-root 2020/11/20 05:59 upstream 131ad0b6 0767f13f .config log report info
ci-upstream-kasan-gce-selinux-root 2020/11/20 05:58 upstream 131ad0b6 0767f13f .config log report info
ci-upstream-kasan-gce-root 2020/11/20 05:58 upstream 3494d588 0767f13f .config log report info
ci-upstream-kasan-gce-selinux-root 2020/10/10 21:49 upstream 6f2f486d 4a77ae0b .config log report info
ci-upstream-kasan-gce-root 2020/10/09 10:33 upstream 3d006ee4 92390980 .config log report info
ci-upstream-kasan-gce-root 2020/07/19 03:32 upstream 6a70f89c 9c812472 .config log report
ci-upstream-kasan-gce-root 2020/07/14 17:36 upstream 0dc589da ce4c95b3 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/11/20 08:20 linux-next 95065cb5 0767f13f .config log report info