INFO: task syz.1.198:5726 blocked for more than 144 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.198 state:D stack:0 pid:5726 tgid:5706 ppid:4712 task_flags:0x400040 flags:0x00000001 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1bec/0x2dcc kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x140/0x218 kernel/sched/core.c:7283 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7340 rwsem_down_write_slowpath+0x6b8/0x113c kernel/locking/rwsem.c:1215 __down_write_common kernel/locking/rwsem.c:1347 [inline] __down_write kernel/locking/rwsem.c:1356 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1626 filemap_invalidate_lock include/linux/fs.h:1084 [inline] blkdev_fallocate+0x22c/0x354 block/fops.c:908 vfs_fallocate+0x514/0x650 fs/open.c:338 madvise_remove mm/madvise.c:1039 [inline] madvise_vma_behavior+0x2778/0x3440 mm/madvise.c:1352 madvise_walk_vmas+0x4b4/0x9a4 mm/madvise.c:1713 madvise_do_behavior+0x5f4/0x7c4 mm/madvise.c:1929 do_madvise+0x1ac/0x278 mm/madvise.c:2022 __do_sys_madvise mm/madvise.c:2031 [inline] __se_sys_madvise mm/madvise.c:2029 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:2029 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Showing all locks held in the system: 2 locks held by kworker/u8:1/15: #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff80008eae7c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff80008eae7c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 1 lock held by khungtaskd/31: #0: ffff800088b672a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088b672a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffff800088b672a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 2 locks held by kworker/u8:5/1346: 3 locks held by kworker/u8:7/3050: 4 locks held by kworker/u8:8/3148: 2 locks held by kworker/u8:10/3392: #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff80009b0f7c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff80009b0f7c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 2 locks held by kworker/u8:13/3847: #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004c940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff80009cc67c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff80009cc67c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 2 locks held by getty/4495: #0: ffff0000cad5c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009232e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/4713: 3 locks held by kworker/u9:4/4722: #0: ffff0000c952c940 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c952c940 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0x748/0x1098 kernel/workqueue.c:3397 #1: ffff80009b927c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff80009b927c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0x750/0x1098 kernel/workqueue.c:3397 #2: ffff0000fe890ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open+0x2c/0xb8 net/bluetooth/hci_core.c:429 1 lock held by syz.1.198/5716: 2 locks held by syz.1.198/5725: 2 locks held by syz.1.198/5726: #0: ffff0000c155b5f8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #0: ffff0000c155b5f8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_fallocate+0x208/0x354 block/fops.c:907 #1: ffff0000c155b790 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1084 [inline] #1: ffff0000c155b790 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_fallocate+0x22c/0x354 block/fops.c:908 1 lock held by syz-executor/6204: #0: ffff800088b6c8a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffff800088b6c8a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x34c/0x67c kernel/rcu/tree_exp.h:961 2 locks held by modprobe/6438: 1 lock held by modprobe/6439: 1 lock held by dhcpcd/6440: =============================================