INFO: task syz-executor:6573 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6573 tgid:6573 ppid:1 task_flags:0x400140 flags:0x00800011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:742 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 io_schedule+0x84/0xf4 kernel/sched/core.c:7789 folio_wait_bit_common+0x56c/0x9e0 mm/filemap.c:1323 __folio_lock mm/filemap.c:1699 [inline] folio_lock include/linux/pagemap.h:1159 [inline] __filemap_get_folio_mpol+0x1ec/0xc3c mm/filemap.c:1954 __filemap_get_folio include/linux/pagemap.h:763 [inline] truncate_inode_pages_range+0x390/0xdec mm/truncate.c:413 truncate_inode_pages mm/truncate.c:485 [inline] truncate_inode_pages_final+0x8c/0xbc mm/truncate.c:520 evict+0x4ec/0xa74 fs/inode.c:839 dispose_list fs/inode.c:879 [inline] evict_inodes+0x774/0x80c fs/inode.c:933 generic_shutdown_super+0xa0/0x2b8 fs/super.c:628 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz-executor:6576 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6576 tgid:6576 ppid:1 task_flags:0x400140 flags:0x00800011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:742 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 io_schedule+0x84/0xf4 kernel/sched/core.c:7789 folio_wait_bit_common+0x56c/0x9e0 mm/filemap.c:1323 __folio_lock mm/filemap.c:1699 [inline] folio_lock include/linux/pagemap.h:1159 [inline] __filemap_get_folio_mpol+0x1ec/0xc3c mm/filemap.c:1954 __filemap_get_folio include/linux/pagemap.h:763 [inline] truncate_inode_pages_range+0x390/0xdec mm/truncate.c:413 truncate_inode_pages mm/truncate.c:485 [inline] truncate_inode_pages_final+0x8c/0xbc mm/truncate.c:520 evict+0x4ec/0xa74 fs/inode.c:839 dispose_list fs/inode.c:879 [inline] evict_inodes+0x774/0x80c fs/inode.c:933 generic_shutdown_super+0xa0/0x2b8 fs/super.c:628 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by pool_workqueue_/3: #0: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffff80008fa611f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x33c/0x628 kernel/rcu/tree_exp.h:956 1 lock held by khungtaskd/32: #0: ffff80008fa5b6e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 1 lock held by klogd/6200: 2 locks held by getty/6354: #0: ffff0000d5a070a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099f1e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfc8 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/6573: #0: ffff0000d0f720e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d0f720e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d0f720e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 1 lock held by syz-executor/6576: #0: ffff0000c83220e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000c83220e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000c83220e0 (&type->s_umount_key#74){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 2 locks held by udevd/8845: 1 lock held by syz-executor/10979: 3 locks held by syz-executor/10983: 1 lock held by syz.2.2005/11964: 1 lock held by syz.8.2016/12008: #0: ffff0000cc10f358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x154/0x654 block/bdev.c:1145 1 lock held by syz.1.2015/12011: =============================================