syzbot


INFO: task hung in do_unlinkat (5)

Status: upstream: reported on 2024/06/02 14:09
Subsystems: kernfs bcachefs exfat
[Documentation on labels]
Reported-by: syzbot+08b113332e19a9378dd5@syzkaller.appspotmail.com
First crash: 76d, last: 1d10h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [kernfs?] [bcachefs?] [exfat?] INFO: task hung in do_unlinkat (5) 0 (1) 2024/06/02 14:09
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in do_unlinkat (2) 1 569d 569d 0/1 auto-obsoleted due to no activity on 2023/03/27 07:50
android-49 INFO: task hung in do_unlinkat 5 2121d 2232d 0/3 auto-closed as invalid on 2019/02/24 11:49
upstream INFO: task hung in do_unlinkat (2) fs 4 1227d 1227d 0/27 auto-closed as invalid on 2021/05/17 08:41
upstream INFO: task hung in do_unlinkat exfat 34 1981d 2217d 0/27 closed as dup on 2018/10/27 13:26
upstream INFO: task hung in do_unlinkat (3) fs 2 945d 988d 0/27 closed as invalid on 2022/02/07 19:19
linux-4.19 INFO: task hung in do_unlinkat 1 699d 699d 0/1 auto-obsoleted due to no activity on 2022/11/17 10:56
upstream INFO: task hung in do_unlinkat (4) exfat 4 537d 643d 0/27 auto-obsoleted due to no activity on 2023/04/08 02:53
linux-5.15 INFO: task hung in do_unlinkat 1 36d 36d 0/3 upstream: reported on 2024/05/12 15:06

Sample crash report:
INFO: task syz-executor.3:11710 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:23800 pid:11710 tgid:11706 ppid:5113   flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
 inode_lock_nested include/linux/fs.h:826 [inline]
 do_unlinkat+0x26a/0x830 fs/namei.c:4394
 __do_sys_unlinkat fs/namei.c:4450 [inline]
 __se_sys_unlinkat fs/namei.c:4443 [inline]
 __x64_sys_unlinkat+0xce/0xf0 fs/namei.c:4443
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd36787cea9
RSP: 002b:00007fd3686530c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007fd3679b4050 RCX: 00007fd36787cea9
RDX: 0000000000000000 RSI: 0000000020000380 RDI: ffffffffffffff9c
RBP: 00007fd3678ebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fd3679b4050 R15: 00007ffe74c69468
 </TASK>
INFO: task syz-executor.3:11726 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:27032 pid:11726 tgid:11706 ppid:5113   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
 inode_lock_shared include/linux/fs.h:801 [inline]
 open_last_lookups fs/namei.c:3573 [inline]
 path_openat+0x7c4/0x3280 fs/namei.c:3804
 do_filp_open+0x235/0x490 fs/namei.c:3834
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1405
 do_sys_open fs/open.c:1420 [inline]
 __do_sys_openat fs/open.c:1436 [inline]
 __se_sys_openat fs/open.c:1431 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1431
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd36787cea9
RSP: 002b:00007fd3686320c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd3679b4120 RCX: 00007fd36787cea9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffffffffff9c
RBP: 00007fd3678ebff4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

Crashes (48):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/17 03:05 upstream 2ccbdf43d5e7 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in do_unlinkat
2024/05/22 04:48 upstream b6394d6f7159 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/20 16:03 upstream eb6a9339efeb c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/19 02:06 upstream 4b377b4868ef c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/17 02:44 upstream 3c999d1ae3c7 c2e07261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/16 14:46 upstream 3c999d1ae3c7 ef5d53ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in do_unlinkat
2024/05/12 01:29 upstream cf87f46fd34d 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/11 20:40 upstream cf87f46fd34d 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/11 20:27 upstream cf87f46fd34d 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/11 20:25 upstream cf87f46fd34d 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/11 11:15 upstream f4345f05c0df 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in do_unlinkat
2024/05/10 10:19 upstream 448b3fe5a0ea de979bc2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/10 10:07 upstream 448b3fe5a0ea de979bc2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/03 08:20 upstream 49a73b1652c5 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/02 10:14 upstream 0106679839f7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/05/02 02:40 upstream 0106679839f7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/28 23:56 upstream e67572cd2204 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/28 23:55 upstream e67572cd2204 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/28 20:40 upstream 2c8159388952 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/27 15:36 upstream 5eb4573ea63d 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in do_unlinkat
2024/04/27 07:49 upstream 5eb4573ea63d 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/27 06:54 upstream 5eb4573ea63d 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/26 22:34 upstream c942a0cd3603 059e9963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/26 10:30 upstream c942a0cd3603 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/26 10:30 upstream c942a0cd3603 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/26 08:15 upstream c942a0cd3603 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/25 18:37 upstream e88c4cfcb7b8 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in do_unlinkat
2024/04/25 04:17 upstream e88c4cfcb7b8 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/25 04:16 upstream e88c4cfcb7b8 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/24 10:46 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/24 01:23 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/24 01:22 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/24 01:21 upstream 9d1ddab261f3 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/23 04:17 upstream a2c63a3f3d68 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/04/21 08:11 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in do_unlinkat
2024/04/21 08:10 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in do_unlinkat
2024/04/20 16:57 upstream 13a2e429f644 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in do_unlinkat
2024/04/03 03:18 upstream fe46a7dd189e 7925100d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in do_unlinkat
2024/06/08 10:18 linux-next d35b2284e966 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/06/02 00:10 linux-next 0e1980c40b6e 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/05/09 04:29 linux-next e7b4ef8fffac 20bf80e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/05/09 04:28 linux-next e7b4ef8fffac 20bf80e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/05/09 04:27 linux-next e7b4ef8fffac 20bf80e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/05/06 12:21 linux-next 2b84edefcad1 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/04/28 17:08 linux-next bb7a2467e6be 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/04/23 23:40 linux-next 7b4f2bc91c15 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/04/23 04:12 linux-next 7b4f2bc91c15 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
2024/04/17 21:13 linux-next 4eab35893071 bd38b692 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in do_unlinkat
* Struck through repros no longer work on HEAD.