INFO: task segctord:7831 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:segctord state:D stack:29480 pid:7831 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0xc91/0x5770 kernel/sched/core.c:6625
schedule+0xde/0x1a0 kernel/sched/core.c:6701
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760
rwsem_down_write_slowpath+0x3e2/0x1220 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d2/0x200 kernel/locking/rwsem.c:1574
nilfs_transaction_lock+0x266/0x410 fs/nilfs2/segment.c:357
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2488 [inline]
nilfs_segctor_thread+0x3bc/0xf30 fs/nilfs2/segment.c:2572
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.1:1732 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28752 pid:1732 ppid:31146 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0xc91/0x5770 kernel/sched/core.c:6625
schedule+0xde/0x1a0 kernel/sched/core.c:6701
wb_wait_for_completion+0x182/0x240 fs/fs-writeback.c:192
sync_inodes_sb+0x1aa/0xa60 fs/fs-writeback.c:2727
sync_inodes_one_sb+0x51/0x60 fs/sync.c:77
iterate_supers+0x140/0x2a0 fs/super.c:745
ksys_sync+0x8a/0x150 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3b1668c169
RSP: 002b:00007f3b174c5168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f3b167abf80 RCX: 00007f3b1668c169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f3b166e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeec0c277f R14: 00007f3b174c5300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c794a70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c794770 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8c7955c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495
2 locks held by getty/4751:
#0: ffff88802c434098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
5 locks held by syz-executor.1/31030:
6 locks held by syz-executor.3/7808:
1 lock held by segctord/7831:
#0: ffff8880397302a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x266/0x410 fs/nilfs2/segment.c:357
6 locks held by syz-executor.4/12887:
3 locks held by kworker/u4:6/19976:
#0: ffff8880b983c298 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:539
#1: ffff88807db9d3f0 (&mm->cid_lock#2){....}-{2:2}, at: mm_cid_get kernel/sched/sched.h:3280 [inline]
#1: ffff88807db9d3f0 (&mm->cid_lock#2){....}-{2:2}, at: switch_mm_cid kernel/sched/sched.h:3302 [inline]
#1: ffff88807db9d3f0 (&mm->cid_lock#2){....}-{2:2}, at: prepare_task_switch kernel/sched/core.c:5117 [inline]
#1: ffff88807db9d3f0 (&mm->cid_lock#2){....}-{2:2}, at: context_switch kernel/sched/core.c:5258 [inline]
#1: ffff88807db9d3f0 (&mm->cid_lock#2){....}-{2:2}, at: __schedule+0x2802/0x5770 kernel/sched/core.c:6625
#2: ffff8880b9829698 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x69c/0xe80 kernel/time/timer.c:1112
2 locks held by kworker/u4:24/21126:
#0: ffff8880177bc938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880177bc938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880177bc938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff8880177bc938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff8880177bc938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff8880177bc938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x87a/0x15c0 kernel/workqueue.c:2361
#1: ffffc9000433fda8 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x15c0 kernel/workqueue.c:2365
2 locks held by syz-executor.1/1732:
#0: ffff88808aad20e0 (&type->s_umount_key#51){++++}-{3:3}, at: iterate_supers+0xdf/0x2a0 fs/super.c:743
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x190/0xa60 fs/fs-writeback.c:2725
2 locks held by syz-executor.1/1814:
#0: ffff88808aad20e0 (&type->s_umount_key#51){++++}-{3:3}, at: iterate_supers+0xdf/0x2a0 fs/super.c:743
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x190/0xa60 fs/fs-writeback.c:2725
2 locks held by syz-executor.1/1864:
#0: ffff88808aad20e0 (&type->s_umount_key#51){++++}-{3:3}, at: iterate_supers+0xdf/0x2a0 fs/super.c:743
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x190/0xa60 fs/fs-writeback.c:2725
2 locks held by syz-executor.1/1865:
#0: ffff88808aad20e0 (&type->s_umount_key#51){++++}-{3:3}, at: iterate_supers+0xdf/0x2a0 fs/super.c:743
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#1: ffff8881466307d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x190/0xa60 fs/fs-writeback.c:2725
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7808 Comm: syz-executor.3 Not tainted 6.3.0-rc6-syzkaller-00046-gde4664485abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
RIP: 0010:lock_is_held_type+0x59/0x140 kernel/locking/lockdep.c:5711
Code: 0f 85 ca 00 00 00 65 4c 8b 24 25 80 b8 03 00 41 8b 94 24 34 0a 00 00 85 d2 0f 85 b1 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 fa <48> c7 c7 00 5c 4c 8a 31 db e8 e9 14 00 00 41 8b 84 24 30 0a 00 00
RSP: 0018:ffffc900034ff250 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8c795560
RBP: ffffffff8c795560 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888026653a80
R13: 00000000ffffffff R14: 00000000ffffffff R15: 0000000000000001
FS: 00007f912a84d700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c004030000 CR3: 0000000026e98000 CR4: 0000000000350ef0
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
__might_resched+0x414/0x580 kernel/sched/core.c:10023
down_read+0x19/0x50 kernel/locking/rwsem.c:1519
nilfs_bmap_lookup_at_level+0x7f/0x3e0 fs/nilfs2/bmap.c:68
nilfs_bmap_lookup fs/nilfs2/bmap.h:170 [inline]
nilfs_mdt_submit_block+0x1a1/0x9d0 fs/nilfs2/mdt.c:142
nilfs_mdt_read_block+0x92/0x3c0 fs/nilfs2/mdt.c:176
nilfs_mdt_get_block+0xea/0xcf0 fs/nilfs2/mdt.c:251
nilfs_palloc_get_block+0xc4/0x2b0 fs/nilfs2/alloc.c:216
nilfs_palloc_get_entry_block+0x16b/0x1d0 fs/nilfs2/alloc.c:318
nilfs_ifile_create_inode+0xf0/0x270 fs/nilfs2/ifile.c:66
nilfs_new_inode+0x83a/0x9b0 fs/nilfs2/inode.c:357
nilfs_create fs/nilfs2/namei.c:85 [inline]
nilfs_create+0x102/0x300 fs/nilfs2/namei.c:75
lookup_open.isra.0+0x105a/0x1400 fs/namei.c:3416
open_last_lookups fs/namei.c:3484 [inline]
path_openat+0x975/0x2750 fs/namei.c:3712
do_filp_open+0x1ba/0x410 fs/namei.c:3742
do_sys_openat2+0x16d/0x4c0 fs/open.c:1348
do_sys_open fs/open.c:1364 [inline]
__do_sys_creat fs/open.c:1440 [inline]
__se_sys_creat fs/open.c:1434 [inline]
__x64_sys_creat+0xcd/0x120 fs/open.c:1434
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9129a8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f912a84d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f9129babf80 RCX: 00007f9129a8c169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007f9129ae7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe5d7a543f R14: 00007f912a84d300 R15: 0000000000022000