INFO: task syz-executor.4:14739 blocked for more than 143 seconds. Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:14739 ppid:8953 flags:0x00000000 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5304 [inline] __schedule+0x1130/0x1fd0 kernel/sched/core.c:6622 schedule+0xc4/0x170 kernel/sched/core.c:6698 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6757 rwsem_down_read_slowpath+0x534/0x858 kernel/locking/rwsem.c:1086 __down_read_common+0x68/0x2d8 kernel/locking/rwsem.c:1250 __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x68/0x78 kernel/locking/rwsem.c:1522 mmap_read_lock include/linux/mmap_lock.h:117 [inline] exit_mm+0x6c/0x214 kernel/exit.c:539 do_exit+0x47c/0x1a30 kernel/exit.c:856 do_group_exit+0x194/0x22c kernel/exit.c:1019 __do_sys_exit_group kernel/exit.c:1030 [inline] __se_sys_exit_group kernel/exit.c:1028 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1028 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 INFO: task syz-executor.4:14740 blocked for more than 143 seconds. Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:14740 ppid:8953 flags:0x00000008 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5304 [inline] __schedule+0x1130/0x1fd0 kernel/sched/core.c:6622 schedule+0xc4/0x170 kernel/sched/core.c:6698 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6757 rwsem_down_read_slowpath+0x534/0x858 kernel/locking/rwsem.c:1086 __down_read_common+0x68/0x2d8 kernel/locking/rwsem.c:1250 __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x68/0x78 kernel/locking/rwsem.c:1522 mmap_read_lock include/linux/mmap_lock.h:117 [inline] exit_mm+0x6c/0x214 kernel/exit.c:539 do_exit+0x47c/0x1a30 kernel/exit.c:856 do_group_exit+0x194/0x22c kernel/exit.c:1019 get_signal+0x14b0/0x159c kernel/signal.c:2859 do_signal arch/arm64/kernel/signal.c:1246 [inline] do_notify_resume+0x3cc/0x3c90 arch/arm64/kernel/signal.c:1299 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 INFO: task syz-executor.4:14752 blocked for more than 143 seconds. Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:0 pid:14752 ppid:8953 flags:0x00000009 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5304 [inline] __schedule+0x1130/0x1fd0 kernel/sched/core.c:6622 schedule+0xc4/0x170 kernel/sched/core.c:6698 io_schedule+0x8c/0x120 kernel/sched/core.c:8884 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1301 folio_wait_bit+0x30/0x40 mm/filemap.c:1445 folio_wait_writeback+0x9c/0x100 mm/page-writeback.c:3127 migrate_folio_unmap mm/migrate.c:1198 [inline] migrate_pages_batch mm/migrate.c:1691 [inline] migrate_pages+0x2ce0/0x5a58 mm/migrate.c:1979 do_mbind mm/mempolicy.c:1338 [inline] kernel_mbind mm/mempolicy.c:1485 [inline] __do_sys_mbind mm/mempolicy.c:1559 [inline] __se_sys_mbind mm/mempolicy.c:1555 [inline] __arm64_sys_mbind+0x7b4/0x9f4 mm/mempolicy.c:1555 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 INFO: task segctord:14748 blocked for more than 143 seconds. Not tainted 6.3.0-rc1-syzkaller-gfe15c26ee26e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:segctord state:D stack:0 pid:14748 ppid:2 flags:0x00000008 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5304 [inline] __schedule+0x1130/0x1fd0 kernel/sched/core.c:6622 schedule+0xc4/0x170 kernel/sched/core.c:6698 io_schedule+0x8c/0x120 kernel/sched/core.c:8884 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1301 __folio_lock+0x2c/0x3c mm/filemap.c:1664 lock_page include/linux/pagemap.h:973 [inline] nilfs_begin_page_io+0x1d0/0x288 fs/nilfs2/segment.c:1648 nilfs_segctor_prepare_write fs/nilfs2/segment.c:1689 [inline] nilfs_segctor_do_construct+0x4078/0x6604 fs/nilfs2/segment.c:2076 nilfs_segctor_construct+0x110/0x768 fs/nilfs2/segment.c:2381 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2489 [inline] nilfs_segctor_thread+0x3e0/0xd88 fs/nilfs2/segment.c:2572 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015eb7c90 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffff800015eb8490 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/28: #0: ffff800015eb7ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 1 lock held by udevd/5475: 2 locks held by getty/5625: #0: ffff0000d355e098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001a9f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 2 locks held by syz-executor.5/6010: 2 locks held by kworker/u4:14/8093: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff80001f607c20 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 2 locks held by kworker/u4:18/8103: #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff0000d4696d20 (&mm->cid_lock#2){....}-{2:2}, at: mm_cid_get+0x17c/0x384 kernel/sched/sched.h:3280 2 locks held by kworker/1:13/8594: #0: ffff0000c0021d38 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff800022587c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 1 lock held by syz-executor.4/14739: #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: exit_mm+0x6c/0x214 kernel/exit.c:539 1 lock held by syz-executor.4/14740: #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: exit_mm+0x6c/0x214 kernel/exit.c:539 1 lock held by syz-executor.4/14752: #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:71 [inline] #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: do_mbind mm/mempolicy.c:1312 [inline] #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: kernel_mbind mm/mempolicy.c:1485 [inline] #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: __do_sys_mbind mm/mempolicy.c:1559 [inline] #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: __se_sys_mbind mm/mempolicy.c:1555 [inline] #0: ffff0000dc42a848 (&mm->mmap_lock){++++}-{3:3}, at: __arm64_sys_mbind+0x5b0/0x9f4 mm/mempolicy.c:1555 1 lock held by segctord/14748: #0: ffff00012b7f52a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x178/0x33c fs/nilfs2/segment.c:357 1 lock held by syz-executor.1/18836: #0: ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] ffff800015ebcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x37c/0x728 kernel/rcu/tree_exp.h:989 4 locks held by syz-executor.3/18845: 6 locks held by syz-executor.5/18844: =============================================