INFO: task kworker/u4:5:4609 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:kworker/u4:5 state:D stack:0 pid:4609 ppid:2 flags:0x00000008 Workqueue: writeback wb_workfn (flush-7:0) 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 folio_lock include/linux/pagemap.h:952 [inline] write_cache_pages+0x434/0xfac mm/page-writeback.c:2440 mpage_writepages+0x10c/0x1d0 fs/mpage.c:653 udf_writepages+0xb4/0xdc fs/udf/inode.c:211 do_writepages+0x2e8/0x570 mm/page-writeback.c:2551 __writeback_single_inode+0x228/0x1ec8 fs/fs-writeback.c:1600 writeback_sb_inodes+0x82c/0x13dc fs/fs-writeback.c:1891 __writeback_inodes_wb+0xec/0x234 fs/fs-writeback.c:1962 wb_writeback+0x50c/0x1580 fs/fs-writeback.c:2067 wb_check_background_flush fs/fs-writeback.c:2133 [inline] wb_do_writeback fs/fs-writeback.c:2221 [inline] wb_workfn+0xe18/0x11b8 fs/fs-writeback.c:2248 process_one_work+0x868/0x16f4 kernel/workqueue.c:2390 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2537 kthread+0x24c/0x2d4 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 INFO: task syz-executor323:5979 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-executor323 state:D stack:0 pid:5979 ppid:5978 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-executor323:5980 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-executor323 state:D stack:0 pid:5980 ppid:5978 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_lock+0x2c/0x3c mm/filemap.c:1664 folio_lock include/linux/pagemap.h:952 [inline] write_cache_pages+0x434/0xfac mm/page-writeback.c:2440 mpage_writepages+0x10c/0x1d0 fs/mpage.c:653 udf_writepages+0xb4/0xdc fs/udf/inode.c:211 do_writepages+0x2e8/0x570 mm/page-writeback.c:2551 filemap_fdatawrite_wbc+0x124/0x174 mm/filemap.c:390 __filemap_fdatawrite_range mm/filemap.c:423 [inline] file_write_and_wait_range+0x1bc/0x2ac mm/filemap.c:781 __generic_file_fsync+0x7c/0x19c fs/libfs.c:1132 generic_file_fsync+0x7c/0xf8 fs/libfs.c:1173 vfs_fsync_range+0x168/0x188 fs/sync.c:188 generic_write_sync include/linux/fs.h:2452 [inline] udf_file_write_iter+0x440/0x568 fs/udf/file.c:126 call_write_iter include/linux/fs.h:1851 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x610/0x914 fs/read_write.c:584 ksys_write+0x15c/0x26c fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __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-executor323:5982 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-executor323 state:D stack:0 pid:5982 ppid:5978 flags:0x00000001 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 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 3 locks held by kworker/u4:5/4609: #0: ffff0000c0e3d938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x664/0x16f4 kernel/workqueue.c:2363 #1: ffff800023087c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x16f4 kernel/workqueue.c:2365 #2: ffff0000cd3f00e0 (&type->s_umount_key#41){.+.+}-{3:3}, at: trylock_super+0x28/0xf8 fs/super.c:414 2 locks held by getty/5627: #0: ffff0000ce47e098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001aa102f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 1 lock held by syz-executor323/5979: #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline] #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: exit_mm+0x6c/0x214 kernel/exit.c:539 2 locks held by syz-executor323/5980: #0: ffff0000dab3b268 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xd8/0x104 fs/file.c:1046 #1: ffff0000cd3f0460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x244/0x914 fs/read_write.c:580 1 lock held by syz-executor323/5982: #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:71 [inline] #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: do_mbind mm/mempolicy.c:1312 [inline] #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: kernel_mbind mm/mempolicy.c:1485 [inline] #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: __do_sys_mbind mm/mempolicy.c:1559 [inline] #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: __se_sys_mbind mm/mempolicy.c:1555 [inline] #0: ffff0000c5743f88 (&mm->mmap_lock){++++}-{3:3}, at: __arm64_sys_mbind+0x5b0/0x9f4 mm/mempolicy.c:1555 =============================================