INFO: task udevd:5164 blocked in I/O wait for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:5164 tgid:5164 ppid:4344 task_flags:0x400140 flags:0x00800011 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1370/0x2d80 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7326 io_schedule+0x1c/0xe0 kernel/sched/core.c:8154 folio_wait_bit_common+0x6b8/0xa30 mm/filemap.c:1329 folio_put_wait_locked mm/filemap.c:1498 [inline] do_read_cache_folio+0x23c/0x5a8 mm/filemap.c:4128 read_cache_folio+0x68/0x88 mm/filemap.c:4178 read_mapping_folio include/linux/pagemap.h:1015 [inline] read_part_sector+0xcc/0x708 block/partitions/core.c:724 adfspart_check_POWERTEC+0x94/0x5b8 block/partitions/acorn.c:451 check_partition block/partitions/core.c:143 [inline] blk_add_partitions block/partitions/core.c:591 [inline] bdev_disk_changed+0x6e4/0x1224 block/partitions/core.c:695 blkdev_get_whole+0x15c/0x240 block/bdev.c:751 bdev_open+0x2b4/0x880 block/bdev.c:960 blkdev_open+0x2d4/0x408 block/fops.c:672 do_dentry_open+0x5c4/0xfc0 fs/open.c:947 vfs_open+0x44/0x2dc fs/open.c:1052 do_open fs/namei.c:4700 [inline] path_openat+0x21fc/0x2a60 fs/namei.c:4863 do_file_open+0x1c8/0x2e8 fs/namei.c:4892 do_sys_openat2+0x114/0x1e8 fs/open.c:1368 do_sys_open+0xb0/0xe0 fs/open.c:1374 __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __arm64_sys_openat+0xa8/0xc4 fs/open.c:1385 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Showing all locks held in the system: 3 locks held by kworker/u8:0/12: #0: ffff0000c004c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c004c140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff80008ec97c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80008ec97c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e14680 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:1/15: #0: ffff0000cd98c140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000cd98c140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff80008ecc7c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80008ecc7c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e14680 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by khungtaskd/31: #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 2 locks held by kworker/u8:2/39: 5 locks held by kworker/u8:7/3369: #0: ffff0000c004e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c004e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff800099307c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff800099307c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089e07308 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x104/0x6c4 net/core/net_namespace.c:673 #3: ffff800089e14680 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #4: ffff800088d2c7a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #4: ffff800088d2c7a8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x340/0x66c kernel/rcu/tree_exp.h:961 1 lock held by dhcpcd/4402: #0: ffff800089e14680 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 2 locks held by getty/4494: #0: ffff0000d125a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009250b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211 1 lock held by udevd/5164: #0: ffff0000c7fa3350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xc4/0x880 block/bdev.c:948 2 locks held by kworker/u8:18/6294: 1 lock held by syz.8.1020/9644: 1 lock held by syz.1.1038/9859: #0: ffff800089e14680 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by syz-executor/9891: #0: ffff0000f3584ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x2c/0xbc net/bluetooth/hci_core.c:497 #1: ffff0000f35840b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x458/0xe38 net/bluetooth/hci_sync.c:5501 #2: ffff800089f7a3e0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2151 [inline] #2: ffff800089f7a3e0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xb0/0x238 net/bluetooth/hci_conn.c:2735 4 locks held by syz-executor/9894: #0: ffff0000c9f14ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x2c/0xbc net/bluetooth/hci_core.c:497 #1: ffff0000c9f140b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x458/0xe38 net/bluetooth/hci_sync.c:5501 #2: ffff800089f7a3e0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2151 [inline] #2: ffff800089f7a3e0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xb0/0x238 net/bluetooth/hci_conn.c:2735 #3: ffff0000da650af8 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x90/0x408 net/bluetooth/l2cap_core.c:1808 1 lock held by syz-executor/9896: 2 locks held by syz-executor/9909: #0: ffff800089e07308 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x43c/0x66c net/core/net_namespace.c:575 #1: ffff800089e14680 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz-executor/9953: 3 locks held by syz-executor/9954: 1 lock held by syz-executor/9968: #0: ffff800089e14680 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 =============================================