INFO: task kworker/1:2:5455 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:0 pid:5455 tgid:5455 ppid:2 task_flags:0x4288060 flags:0x00000008 Workqueue: md_misc mddev_delayed_delete Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 devtmpfs_submit_req+0xac/0x114 drivers/base/devtmpfs.c:122 devtmpfs_delete_node+0xd8/0x128 drivers/base/devtmpfs.c:171 device_del+0x59c/0x7b4 drivers/base/core.c:3834 del_gendisk+0x3fc/0x87c block/genhd.c:734 md_kobj_release+0x84/0xd8 drivers/md/md.c:5749 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x17c/0x430 lib/kobject.c:737 mddev_delayed_delete+0x14/0x20 drivers/md/md.c:5828 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task udevd:7923 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:7923 tgid:7923 ppid:3120 task_flags:0x400040 flags:0x00000005 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:746 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:798 blk_probe_dev+0x30/0x168 block/genhd.c:820 blk_request_module+0x18/0xa4 block/genhd.c:836 blkdev_get_no_open+0x74/0xbc block/bdev.c:787 bdev_statx+0x8c/0x498 block/bdev.c:1288 vfs_getattr_nosec+0x290/0x374 fs/stat.c:224 vfs_getattr fs/stat.c:259 [inline] vfs_statx_path fs/stat.c:296 [inline] vfs_statx+0x104/0x2c4 fs/stat.c:353 vfs_fstatat+0x64/0xd8 fs/stat.c:372 __do_sys_newfstatat+0xa8/0x108 fs/stat.c:536 __se_sys_newfstatat fs/stat.c:530 [inline] __arm64_sys_newfstatat+0x88/0xc8 fs/stat.c:530 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x10c/0x138 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task udevd:7923 is blocked on a mutex likely owned by task kdevtmpfs:25. task:kdevtmpfs state:D stack:0 pid:25 tgid:25 ppid:2 task_flags:0x208140 flags:0x00000008 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 __flush_workqueue+0x2d0/0xef8 kernel/workqueue.c:4000 md_alloc+0x40/0xca0 drivers/md/md.c:5862 md_alloc_and_put drivers/md/md.c:5951 [inline] md_probe drivers/md/md.c:5964 [inline] md_probe+0x30/0x54 drivers/md/md.c:5959 blk_probe_dev+0xec/0x168 block/genhd.c:823 blk_request_module+0x18/0xa4 block/genhd.c:836 blkdev_get_no_open+0x74/0xbc block/bdev.c:787 bdev_statx+0x8c/0x498 block/bdev.c:1288 vfs_getattr_nosec+0x290/0x374 fs/stat.c:224 vfs_getattr+0x40/0x54 fs/stat.c:259 handle_remove+0xec/0x4f8 drivers/base/devtmpfs.c:335 handle drivers/base/devtmpfs.c:395 [inline] devtmpfs_work_loop+0x264/0x634 drivers/base/devtmpfs.c:408 get_nid_for_pfn+0x0/0xd0 drivers/base/devtmpfs.c:450 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Showing all locks held in the system: 3 locks held by kworker/u8:0/12: #0: ffff0000133d0148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff80008d507c80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 2 locks held by kdevtmpfs/25: #0: ffff00000de30950 (&type->i_mutex_dir_key/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #0: ffff00000de30950 (&type->i_mutex_dir_key/1){+.+.}-{4:4}, at: __kern_path_locked+0xd4/0x1f8 fs/namei.c:2765 #1: ffff80008771a4e8 (major_names_lock){+.+.}-{4:4}, at: blk_probe_dev+0x30/0x168 block/genhd.c:820 2 locks held by pr/ttyAMA0/32: 1 lock held by khungtaskd/33: #0: ffff80008728da60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6758 1 lock held by klogd/3109: 1 lock held by dhcpcd/3150: #0: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 2 locks held by getty/3240: #0: ffff000017f860a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008d50b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0xdb4 drivers/tty/n_tty.c:2222 2 locks held by kworker/1:2/5455: #0: ffff00000f3e2948 ((wq_completion)md_misc){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff8000a0997c80 ((work_completion)(&mddev->del_work)){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 1 lock held by udevd/7923: #0: ffff80008771a4e8 (major_names_lock){+.+.}-{4:4}, at: blk_probe_dev+0x30/0x168 block/genhd.c:820 2 locks held by syz.1.1764/8148: #0: ffff00000de52420 (sb_writers){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1783 [inline] #0: ffff00000de52420 (sb_writers){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1919 [inline] #0: ffff00000de52420 (sb_writers){.+.+}-{0:0}, at: mnt_want_write+0x3c/0xb0 fs/namespace.c:556 #1: ffff00000de30950 (&type->i_mutex_dir_key#2){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #1: ffff00000de30950 (&type->i_mutex_dir_key#2){++++}-{4:4}, at: open_last_lookups fs/namei.c:3797 [inline] #1: ffff00000de30950 (&type->i_mutex_dir_key#2){++++}-{4:4}, at: path_openat+0xcbc/0x25e4 fs/namei.c:4036 3 locks held by kworker/u8:5/8185: #0: ffff00000d831148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff80008f307c80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 2 locks held by syz-executor/8192: #0: ffff800087091bb8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0xb8/0x218 net/core/rtnetlink.c:573 #1: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x4b8/0x1810 net/core/rtnetlink.c:4064 1 lock held by syz.0.1793/8259: #0: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 1 lock held by syz-executor/8263: #0: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 =============================================