INFO: task udevd:8146 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack: 0 pid: 8146 ppid: 2561 flags:0x00000008 Call trace: __switch_to+0x180/0x28c arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x570 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 io_schedule+0x38/0x104 kernel/sched/core.c:8714 folio_wait_bit_common+0x458/0x9f8 mm/filemap.c:1298 folio_put_wait_locked mm/filemap.c:1472 [inline] do_read_cache_folio+0x78/0x550 mm/filemap.c:3501 read_cache_folio+0x40/0x54 mm/filemap.c:3551 read_mapping_folio include/linux/pagemap.h:762 [inline] read_part_sector+0x60/0x1d8 block/partitions/core.c:714 adfspart_check_ICS+0x4c/0x38c block/partitions/acorn.c:360 check_partition block/partitions/core.c:146 [inline] blk_add_partitions block/partitions/core.c:599 [inline] bdev_disk_changed+0x340/0x63c block/partitions/core.c:685 blkdev_get_whole+0x1b0/0x1f8 block/bdev.c:684 blkdev_get_by_dev+0x178/0x2fc block/bdev.c:821 blkdev_open+0x84/0xd8 block/fops.c:485 do_dentry_open+0x318/0x688 fs/open.c:878 vfs_open+0x38/0x48 fs/open.c:1014 do_open fs/namei.c:3557 [inline] path_openat+0xe34/0x11c4 fs/namei.c:3691 do_filp_open+0xdc/0x1b8 fs/namei.c:3718 do_sys_openat2+0xb8/0x22c fs/open.c:1311 do_sys_open fs/open.c:1327 [inline] __do_sys_openat fs/open.c:1343 [inline] __se_sys_openat fs/open.c:1338 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1338 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 INFO: task syz-executor.4:992 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack: 0 pid: 992 ppid: 3162 flags:0x0000000d Call trace: __switch_to+0x180/0x28c arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x570 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629 __mutex_lock_common+0x74c/0xc28 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 blkdev_put+0x78/0x270 block/bdev.c:910 blkdev_close+0x24/0x38 block/fops.c:499 __fput+0x198/0x3bc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:353 task_work_run+0xc4/0x208 kernel/task_work.c:177 get_signal+0xac8/0xb30 kernel/signal.c:2634 do_signal+0x128/0x424 arch/arm64/kernel/signal.c:1071 do_notify_resume+0xc0/0x1d0 arch/arm64/kernel/signal.c:1124 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/10: #0: ffff80000d4a3568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/11: #0: ffff80000d4a3bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/26: #0: ffff80000d4a3440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 2 locks held by getty/2713: #0: ffff0000c663c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f67e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x88c drivers/tty/n_tty.c:2177 1 lock held by udevd/8146: #0: ffff0000c3846cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812 1 lock held by syz-executor.4/992: #0: ffff0000c3846cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x78/0x270 block/bdev.c:910 1 lock held by syz-executor.4/1116: #0: ffff0000c3846cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812 1 lock held by syz-executor.4/1213: #0: ffff0000c3846cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812 1 lock held by dhcpcd/1238: #0: ffff000172e30130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline] #0: ffff000172e30130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x3c/0x6dc net/packet/af_packet.c:3194 =============================================