INFO: task syz-executor108:6288 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6288 tgid:6286 ppid:6211 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 io_schedule+0x8c/0x12c kernel/sched/core.c:9023 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1274 folio_wait_bit+0x30/0x40 mm/filemap.c:1413 folio_wait_writeback+0x14c/0x3bc mm/page-writeback.c:3061 migrate_folio_unmap mm/migrate.c:1186 [inline] migrate_pages_batch+0xc48/0x2538 mm/migrate.c:1675 migrate_pages_sync mm/migrate.c:1868 [inline] migrate_pages+0x1bf8/0x3114 mm/migrate.c:1950 do_mbind mm/mempolicy.c:1344 [inline] kernel_mbind mm/mempolicy.c:1486 [inline] __do_sys_mbind mm/mempolicy.c:1560 [inline] __se_sys_mbind mm/mempolicy.c:1556 [inline] __arm64_sys_mbind+0x13b8/0x18cc mm/mempolicy.c:1556 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor108:6295 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6295 tgid:6294 ppid:6210 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 io_schedule+0x8c/0x12c kernel/sched/core.c:9023 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1274 folio_wait_bit+0x30/0x40 mm/filemap.c:1413 folio_wait_writeback+0x14c/0x3bc mm/page-writeback.c:3061 __filemap_fdatawait_range+0x16c/0x304 mm/filemap.c:523 filemap_fdatawait_keep_errors+0x34/0xb0 mm/filemap.c:618 sync_bdevs+0x1a4/0x28c block/bdev.c:1107 ksys_sync+0xe4/0x1cc fs/sync.c:106 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task segctord:6298 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:segctord state:D stack:0 pid:6298 tgid:6298 ppid:2 flags:0x00000008 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 io_schedule+0x8c/0x12c kernel/sched/core.c:9023 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1274 __folio_lock+0x2c/0x3c mm/filemap.c:1612 folio_lock include/linux/pagemap.h:1048 [inline] nilfs_lookup_dirty_data_buffers+0x2b0/0x7e8 fs/nilfs2/segment.c:727 nilfs_segctor_scan_file+0x1e4/0xcdc fs/nilfs2/segment.c:1084 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1206 [inline] nilfs_segctor_collect fs/nilfs2/segment.c:1533 [inline] nilfs_segctor_do_construct+0x16ec/0x64a4 fs/nilfs2/segment.c:2082 nilfs_segctor_construct+0x110/0x768 fs/nilfs2/segment.c:2416 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2524 [inline] nilfs_segctor_thread+0x3d8/0xd78 fs/nilfs2/segment.c:2608 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 INFO: task syz-executor108:6297 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6297 tgid:6297 ppid:6212 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 coredump_task_exit+0x2a8/0x3e4 kernel/exit.c:439 do_exit+0x1b8/0x1f64 kernel/exit.c:825 do_group_exit+0x194/0x22c kernel/exit.c:1020 get_signal+0x1500/0x15ec kernel/signal.c:2893 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x3bc/0x393c arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor108:6299 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6299 tgid:6297 ppid:6212 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 wb_wait_for_completion+0x154/0x29c fs/fs-writeback.c:192 sync_inodes_sb+0x220/0x944 fs/fs-writeback.c:2758 sync_inodes_one_sb+0x58/0x70 fs/sync.c:77 iterate_supers+0xd4/0x188 fs/super.c:927 ksys_sync+0xb4/0x1cc fs/sync.c:102 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor108:6301 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6301 tgid:6297 ppid:6212 flags:0x00000005 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_timeout+0xb8/0x348 kernel/time/timer.c:2159 do_wait_for_common+0x30c/0x468 kernel/sched/completion.c:95 __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_state+0x50/0x7c kernel/sched/completion.c:264 coredump_wait fs/coredump.c:414 [inline] do_coredump+0x85c/0x23cc fs/coredump.c:571 get_signal+0xfec/0x15ec kernel/signal.c:2879 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x328/0x393c arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_da+0xac/0x168 arch/arm64/kernel/entry-common.c:547 el0t_64_sync_handler+0xcc/0xfc arch/arm64/kernel/entry-common.c:699 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor108:6302 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6302 tgid:6302 ppid:6208 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 coredump_task_exit+0x2a8/0x3e4 kernel/exit.c:439 do_exit+0x1b8/0x1f64 kernel/exit.c:825 do_group_exit+0x194/0x22c kernel/exit.c:1020 get_signal+0x1500/0x15ec kernel/signal.c:2893 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x3bc/0x393c arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor108:6303 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6303 tgid:6302 ppid:6208 flags:0x00000005 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 rwsem_down_write_slowpath+0xcfc/0x1aa0 kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write kernel/locking/rwsem.c:1315 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1580 bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2756 sync_inodes_one_sb+0x58/0x70 fs/sync.c:77 iterate_supers+0xd4/0x188 fs/super.c:927 ksys_sync+0xb4/0x1cc fs/sync.c:102 __arm64_sys_sync+0x14/0x24 fs/sync.c:113 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor108:6308 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6308 tgid:6302 ppid:6208 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_timeout+0xb8/0x348 kernel/time/timer.c:2159 do_wait_for_common+0x30c/0x468 kernel/sched/completion.c:95 __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_state+0x50/0x7c kernel/sched/completion.c:264 coredump_wait fs/coredump.c:414 [inline] do_coredump+0x85c/0x23cc fs/coredump.c:571 get_signal+0xfec/0x15ec kernel/signal.c:2879 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x328/0x393c arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_da+0xac/0x168 arch/arm64/kernel/entry-common.c:547 el0t_64_sync_handler+0xcc/0xfc arch/arm64/kernel/entry-common.c:699 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor108:6305 blocked for more than 143 seconds. Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor108 state:D stack:0 pid:6305 tgid:6305 ppid:6209 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 coredump_task_exit+0x2a8/0x3e4 kernel/exit.c:439 do_exit+0x1b8/0x1f64 kernel/exit.c:825 do_group_exit+0x194/0x22c kernel/exit.c:1020 get_signal+0x1500/0x15ec kernel/signal.c:2893 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x3bc/0x393c arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008ee44100 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297 2 locks held by kworker/u4:2/40: #0: ffff0000c1fcc538 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606 #1: ffff800093e37c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608 2 locks held by getty/5940: #0: ffff0000d358b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800093fd02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 1 lock held by syz-executor108/6295: #0: ffff0000caa5f4c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x150/0x28c block/bdev.c:1097 1 lock held by segctord/6298: #0: ffff0000c26a52a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x178/0x33c fs/nilfs2/segment.c:357 2 locks held by syz-executor108/6299: #0: ffff0000cd2720e0 (&type->s_umount_key#62){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000cd2720e0 (&type->s_umount_key#62){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120 #1: ffff0000caa7c7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff0000caa7c7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2756 2 locks held by syz-executor108/6303: #0: ffff0000cd2720e0 (&type->s_umount_key#62){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000cd2720e0 (&type->s_umount_key#62){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120 #1: ffff0000caa7c7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff0000caa7c7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2756 2 locks held by syz-executor108/6306: #0: ffff0000cd2720e0 (&type->s_umount_key#62){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000cd2720e0 (&type->s_umount_key#62){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120 #1: ffff0000caa7c7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff0000caa7c7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x208/0x944 fs/fs-writeback.c:2756 =============================================