INFO: task hung in d_alloc

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-6.1	INFO: task hung in d_alloc_parallel (2) origin:lts-only	C			2	15d	30d	0/3	upstream: reported C repro on 2024/11/04 12:30
android-49	INFO: task hung in d_alloc_parallel				85	1911d	2061d	0/3	auto-closed as invalid on 2020/01/08 20:52
linux-5.15	INFO: task hung in d_alloc_parallel origin:upstream	C			73	1d03h	230d	0/3	upstream: reported C repro on 2024/04/18 05:41
linux-4.14	INFO: task hung in d_alloc_parallel	C		error	4	1330d	1939d	0/1	upstream: reported C repro on 2019/08/14 00:43
linux-4.19	INFO: task hung in d_alloc_parallel vfs	C		error	5	660d	1677d	0/1	upstream: reported C repro on 2020/05/01 20:49
upstream	INFO: task hung in d_alloc_parallel fuse				213	2105d	2436d	0/28	closed as dup on 2018/09/08 15:40
linux-6.1	INFO: task hung in d_alloc_parallel				43	110d	233d	0/3	auto-obsoleted due to no activity on 2024/10/24 17:53
upstream	INFO: task hung in d_alloc_parallel (2) fs	C	done	error	1374	9h10m	1869d	0/28	upstream: reported C repro on 2019/10/22 22:44

[32620] 0 32620 18145 8746 25 3 0 0 syz-executor.3 [32624] 0 32624 18178 8748 25 3 0 0 syz-executor.3 [ 322] 0 322 34596 9016 28 5 0 0 syz-executor.3 INFO: task syz-executor.0:1830 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 [ 363] 0 363 18178 8746 25 3 0 0 syz-executor.5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D25008 1830 1824 0x00000000 [ 370] 0 370 18211 8748 25 3 0 0 syz-executor.5 Call Trace: [ 598] 0 598 18178 8992 26 4 0 0 syz-executor.5 schedule+0x92/0x1c0 kernel/sched/core.c:3498 d_wait_lookup fs/dcache.c:2476 [inline] d_alloc_parallel+0xfc7/0x1610 fs/dcache.c:2558 [ 775] 0 775 34596 9015 28 5 0 0 syz-executor.3 [ 789] 0 789 18145 8743 25 3 0 0 syz-executor.5 lookup_slow+0x18c/0x440 fs/namei.c:1777 [ 792] 0 792 18178 8745 25 3 0 0 syz-executor.5 [ 908] 0 908 18145 8743 25 3 0 0 syz-executor.5 walk_component+0x6d0/0xbf0 fs/namei.c:1923 [ 915] 0 915 18211 8748 25 3 0 0 syz-executor.5 [ 1290] 0 1290 18145 8970 26 4 0 0 syz-executor.3 link_path_walk+0x84a/0x1110 fs/namei.c:2252 path_openat+0x178/0x2be0 fs/namei.c:3680 [ 1334] 0 1334 18244 8999 28 4 0 0 syz-executor.5 [ 1349] 0 1349 18244 8999 28 4 0 0 syz-executor.5 [ 1434] 0 1434 18145 8744 24 3 0 0 syz-executor.3 do_filp_open+0x1a1/0x280 fs/namei.c:3715 [ 1438] 0 1438 18178 8778 26 3 0 0 syz-executor.3 [ 1969] 0 1969 18145 8744 25 3 0 0 syz-executor.2 [ 2019] 0 2019 18211 8750 25 3 0 0 syz-executor.2 [ 2022] 0 2022 34629 9016 30 5 0 0 syz-executor.5 [ 2060] 0 2060 34629 9016 30 5 0 0 syz-executor.5 do_sys_open+0x2ca/0x590 fs/open.c:1096 [ 2304] 0 2304 18244 9720 27 4 0 0 syz-executor.3 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 [ 2434] 0 2434 18145 8746 26 3 0 0 syz-executor.3 entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 2918] 0 2918 18178 8747 25 3 0 0 syz-executor.3 RIP: 0033:0x4579d0 RSP: 002b:00007ffd1f10d6e0 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 [ 2934] 0 2934 18211 8765 25 3 0 0 syz-executor.3 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004579d0 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004be4bc [ 2981] 0 2981 18145 8970 26 4 0 0 syz-executor.3 RBP: 000000000000385f R08: 0000000000000001 R09: 00000000029f8940 [ 3012] 0 3012 18145 8967 26 4 0 0 syz-executor.2 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000006 [ 3024] 0 3024 18145 8967 26 4 0 0 syz-executor.2 R13: 00007ffd1f10d7c0 R14: 0000000000320f8c R15: 00007ffd1f10d7d0 [ 3064] 0 3064 18145 8984 26 4 0 0 syz-executor.5 [ 3070] 0 3070 18145 8984 26 4 0 0 syz-executor.5 INFO: task syz-executor.3:1841 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D24768 1841 1828 0x00000000 Call Trace: [ 3076] 0 3076 18145 8984 26 4 0 0 syz-executor.5 schedule+0x92/0x1c0 kernel/sched/core.c:3498 [ 3524] 0 3524 18145 8967 26 4 0 0 syz-executor.2 [ 3536] 0 3536 18145 8967 26 4 0 0 syz-executor.2 d_wait_lookup fs/dcache.c:2476 [inline] d_alloc_parallel+0xfc7/0x1610 fs/dcache.c:2558 [ 3541] 0 3541 18145 8967 26 4 0 0 syz-executor.2 [ 3545] 0 3545 18145 8967 26 4 0 0 syz-executor.2 [ 3549] 0 3549 18145 8967 26 4 0 0 syz-executor.2 lookup_slow+0x18c/0x440 fs/namei.c:1777 [ 3552] 0 3552 18145 8967 26 4 0 0 syz-executor.2 [ 3588] 0 3588 18145 8984 26 4 0 0 syz-executor.5 walk_component+0x6d0/0xbf0 fs/namei.c:1923 [ 3591] 0 3591 18145 8734 24 3 0 0 syz-executor.2 link_path_walk+0x84a/0x1110 fs/namei.c:2252 [ 3593] 0 3593 18145 8984 26 4 0 0 syz-executor.5 [ 3603] 0 3603 18145 8984 26 4 0 0 syz-executor.5 path_openat+0x178/0x2be0 fs/namei.c:3680 [ 3608] 0 3608 18145 8984 26 4 0 0 syz-executor.5 [ 3615] 0 3615 18145 8984 26 4 0 0 syz-executor.5 do_filp_open+0x1a1/0x280 fs/namei.c:3715 [ 3616] 0 3616 18145 8734 24 3 0 0 syz-executor.2 [ 3620] 0 3620 18145 8984 26 4 0 0 syz-executor.5 [ 3639] 0 3639 18145 8734 24 3 0 0 syz-executor.2 [ 3681] 0 3681 18145 8967 26 4 0 0 syz-executor.2 [ 3686] 0 3686 18145 8967 26 4 0 0 syz-executor.2 [ 3857] 0 3857 18145 8969 26 4 0 0 syz-executor.3 do_sys_open+0x2ca/0x590 fs/open.c:1096 [ 3879] 0 3879 18145 8969 26 4 0 0 syz-executor.3 [ 3887] 0 3887 18145 8969 26 4 0 0 syz-executor.3 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4579d0 RSP: 002b:00007ffe9a951510 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 [ 3936] 0 3936 18145 8969 26 4 0 0 syz-executor.3 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004579d0 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004be4bc [ 3942] 0 3942 18145 8969 26 4 0 0 syz-executor.3 [ 3945] 0 3945 18145 8969 26 4 0 0 syz-executor.3 RBP: 0000000000003c73 R08: 0000000000000001 R09: 00000000018b0940 [ 3960] 0 3960 18145 8969 26 4 0 0 syz-executor.3 [ 3968] 0 3968 18145 8969 26 4 0 0 syz-executor.3 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000007 R13: 00007ffe9a9515f0 R14: 0000000000320f85 R15: 00007ffe9a951600 INFO: task syz-executor.2:30462 blocked for more than 140 seconds. [ 3975] 0 3975 18145 8969 26 4 0 0 syz-executor.3 Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4010] 0 4010 18145 8736 24 3 0 0 syz-executor.3 syz-executor.2 D24192 30462 30461 0x00000000 [ 4023] 0 4023 18145 8736 24 3 0 0 syz-executor.3 Call Trace: [ 4031] 0 4031 18145 8736 24 3 0 0 syz-executor.3 schedule+0x92/0x1c0 kernel/sched/core.c:3498 d_wait_lookup fs/dcache.c:2476 [inline] d_alloc_parallel+0xfc7/0x1610 fs/dcache.c:2558 [ 4037] 0 4037 18145 8969 26 4 0 0 syz-executor.3 [ 4040] 0 4040 18145 8969 26 4 0 0 syz-executor.3 lookup_slow+0x18c/0x440 fs/namei.c:1777 [ 4044] 0 4044 18145 8969 26 4 0 0 syz-executor.3 walk_component+0x6d0/0xbf0 fs/namei.c:1923 [ 5361] 0 5361 18145 8742 25 3 0 0 syz-executor.5 link_path_walk+0x84a/0x1110 fs/namei.c:2252 [ 5371] 0 5371 18145 8742 25 3 0 0 syz-executor.5 path_openat+0x178/0x2be0 fs/namei.c:3680 [ 5381] 0 5381 18145 8742 25 3 0 0 syz-executor.5 [ 5397] 0 5397 18145 8984 26 4 0 0 syz-executor.5 do_filp_open+0x1a1/0x280 fs/namei.c:3715 [ 5402] 0 5402 18145 8984 26 4 0 0 syz-executor.5 [ 5406] 0 5406 18145 8984 26 4 0 0 syz-executor.5 do_sys_open+0x2ca/0x590 fs/open.c:1096 [ 5501] 0 5501 18211 8973 28 4 0 1000 syz-executor.0 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4579d0 [ 5837] 0 5837 18145 8967 27 4 0 0 syz-executor.0 RSP: 002b:00007ffcd3196b30 EFLAGS: 00000206 ORIG_RAX: 0000000000000002 [ 5854] 0 5854 18145 8967 27 4 0 0 syz-executor.0 [ 6088] 0 6088 18145 8967 27 4 0 0 syz-executor.0 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004579d0 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004be4bc [ 6173] 0 6173 18145 8967 27 4 0 0 syz-executor.0 RBP: 0000000000002a93 R08: 0000000000000001 R09: 0000000001065940 [ 6189] 0 6189 18145 8967 27 4 0 0 syz-executor.0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000006 [ 6248] 0 6248 18145 8967 27 4 0 0 syz-executor.0 R13: 00007ffcd3196c10 R14: 0000000000320f81 R15: 00007ffcd3196c20 [ 6265] 0 6265 18145 8967 27 4 0 0 syz-executor.0 INFO: task syz-executor.4:27404 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 [ 6311] 0 6311 18145 8967 27 4 0 0 syz-executor.0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28528 27404 6397 0x00000004 [ 6332] 0 6332 18145 8967 27 4 0 0 syz-executor.0 Call Trace: [ 6337] 0 6337 18145 8967 27 4 0 0 syz-executor.0 [ 6456] 0 6456 18145 8967 27 4 0 0 syz-executor.0 [ 6493] 0 6493 18145 8967 27 4 0 0 syz-executor.0 schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [ 6518] 0 6518 18145 8967 27 4 0 0 syz-executor.0 [ 6537] 0 6537 18145 8967 26 4 0 0 syz-executor.2 pipe_lock_nested fs/pipe.c:67 [inline] pipe_lock fs/pipe.c:75 [inline] pipe_wait+0x1a1/0x1c0 fs/pipe.c:123 [ 6544] 0 6544 18145 8967 26 4 0 0 syz-executor.2 pipe_write+0x510/0xe20 fs/pipe.c:490 call_write_iter include/linux/fs.h:1798 [inline] new_sync_write fs/read_write.c:471 [inline] __vfs_write+0x401/0x5a0 fs/read_write.c:484 [ 6548] 0 6548 18145 8967 26 4 0 0 syz-executor.2 [ 6553] 0 6553 18145 8967 26 4 0 0 syz-executor.2 vfs_write+0x17f/0x4d0 fs/read_write.c:546 SYSC_write fs/read_write.c:594 [inline] SyS_write+0x102/0x250 fs/read_write.c:586 [ 6559] 0 6559 18145 8967 26 4 0 0 syz-executor.2 [ 6574] 0 6574 18145 8984 26 4 0 0 syz-executor.5 [ 6582] 0 6582 18145 8967 26 4 0 0 syz-executor.2 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459a59 RSP: 002b:00007f3653305c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 6586] 0 6586 18145 8967 27 4 0 0 syz-executor.0 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a59 RDX: 0000000041395527 RSI: 0000000020000340 RDI: 0000000000000005 [ 6587] 0 6587 18145 8984 26 4 0 0 syz-executor.5 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 [ 6596] 0 6596 18145 8984 26 4 0 0 syz-executor.5 [ 6607] 0 6607 18145 8984 26 4 0 0 syz-executor.5 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f36533066d4 R13: 00000000004c623a R14: 00000000004e0e80 R15: 00000000ffffffff INFO: task syz-executor.3:27408 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 [ 6612] 0 6612 18145 8984 26 4 0 0 syz-executor.5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 6617] 0 6617 18145 8984 26 4 0 0 syz-executor.5 syz-executor.3 D [ 6648] 0 6648 18145 8967 27 4 0 0 syz-executor.0 29600 27408 1841 0x00000004 Call Trace: [ 6744] 0 6744 18145 8967 27 4 0 0 syz-executor.0 schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 [ 6793] 0 6793 18145 8967 27 4 0 0 syz-executor.0 [ 6803] 0 6803 18145 8967 27 4 0 0 syz-executor.0 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [ 6810] 0 6810 18145 8967 27 4 0 0 syz-executor.0 [ 6828] 0 6828 18145 8967 27 4 0 0 syz-executor.0 pipe_lock_nested fs/pipe.c:67 [inline] pipe_lock fs/pipe.c:75 [inline] pipe_wait+0x1a1/0x1c0 fs/pipe.c:123 pipe_write+0x510/0xe20 fs/pipe.c:490 call_write_iter include/linux/fs.h:1798 [inline] new_sync_write fs/read_write.c:471 [inline] __vfs_write+0x401/0x5a0 fs/read_write.c:484 vfs_write+0x17f/0x4d0 fs/read_write.c:546 SYSC_write fs/read_write.c:594 [inline] SyS_write+0x102/0x250 fs/read_write.c:586 [ 6842] 0 6842 18145 8969 26 4 0 0 syz-executor.3