INFO: task syz-executor:6534 blocked for more than 145 seconds. Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6534 tgid:6534 ppid:6522 task_flags:0x400140 flags:0x00000018 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5397 [inline] __schedule+0x141c/0x2a14 kernel/sched/core.c:6786 __schedule_loop kernel/sched/core.c:6864 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6879 wb_wait_for_completion+0x150/0x280 fs/fs-writeback.c:216 sync_inodes_sb+0x184/0x870 fs/fs-writeback.c:2833 sync_filesystem+0x160/0x218 fs/sync.c:64 generic_shutdown_super+0x70/0x2b8 fs/super.c:622 kill_block_super+0x44/0x90 fs/super.c:1755 ntfs3_kill_sb+0x44/0x17c fs/ntfs3/super.c:1812 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1417 __cleanup_mnt+0x20/0x30 fs/namespace.c:1424 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 1 lock held by kworker/R-mm_pe/13: #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 3 locks held by kworker/u8:1/14: 1 lock held by khungtaskd/32: #0: ffff80008f869980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 3 locks held by kworker/u8:2/41: 3 locks held by kworker/u8:3/42: 1 lock held by pr/ttyAMA0/43: 3 locks held by kworker/u8:4/247: 2 locks held by kworker/u8:5/310: 3 locks held by kworker/u8:6/632: 3 locks held by kworker/u8:7/2038: 3 locks held by kworker/u8:8/2125: 3 locks held by kworker/u8:9/2140: 3 locks held by kworker/u8:10/2178: 4 locks held by kworker/0:2/3921: 4 locks held by kworker/R-bat_e/4255: 1 lock held by klogd/6132: 3 locks held by udevd/6143: 2 locks held by dhcpcd/6197: 3 locks held by dhcpcd/6198: 2 locks held by getty/6295: #0: ffff0000d2c770a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba4b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 1 lock held by udevd/6518: 2 locks held by udevd/6520: 1 lock held by syz-executor/6526: #0: ffff0000c89160e0 (&type->s_umount_key#30){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000c89160e0 (&type->s_umount_key#30){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000c89160e0 (&type->s_umount_key#30){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 2 locks held by syz-executor/6534: #0: ffff0000d841c0e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d841c0e0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d841c0e0 (&type->s_umount_key#84){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff0000c9d2e7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:387 [inline] #1: ffff0000c9d2e7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x16c/0x870 fs/fs-writeback.c:2831 1 lock held by kworker/R-wg-cr/6553: #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/6555: #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 1 lock held by kworker/R-wg-cr/6558: #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline] #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3531 1 lock held by kworker/R-wg-cr/6570: #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678 1 lock held by kworker/R-wg-cr/6573: 3 locks held by kworker/1:5/6594: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a2da7bc0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 4 locks held by kworker/0:4/6602: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a2d17bc0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d5730768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6062 [inline] #3: ffff0000d5730768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc4/0x1c0 net/wireless/reg.c:3209 1 lock held by udevd/6648: 1 lock held by udevd/6765: #0: ffff0000c149ccb0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff0000c149ccb0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:832 1 lock held by kmmpd-loop3/7441: #0: ffff0000c8916428 (sb_writers#3){.+.+}-{0:0}, at: kmmpd+0x2ec/0x9b8 fs/ext4/mmp.c:178 2 locks held by kworker/0:5/7443: 2 locks held by udevadm/7451: 1 lock held by syz.4.148/7462: #0: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by syz.0.150/7459: 3 locks held by kworker/u8:11/7463: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a0107bc0 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:12/7464: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212 #1: ffff8000a3907bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212 #2: ffff8000928c7ba8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by syz-executor/7467: 2 locks held by kworker/u8:13/7468: 1 lock held by kworker/u8:14/7469: #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3327 [inline] #0: ffff80008f7113c8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_thread+0x64/0xed8 kernel/workqueue.c:3353 =============================================