INFO: task udevd:6214 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:6214 tgid:6214 ppid:5783 flags:0x00000004 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 io_schedule+0x8c/0x12c kernel/sched/core.c:9023 folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1274 folio_put_wait_locked mm/filemap.c:1438 [inline] do_read_cache_folio+0xa8/0x548 mm/filemap.c:3685 read_cache_folio+0x68/0x84 mm/filemap.c:3735 read_mapping_folio include/linux/pagemap.h:894 [inline] read_part_sector+0xdc/0x2b8 block/partitions/core.c:726 adfspart_check_ICS+0xd4/0x860 block/partitions/acorn.c:360 check_partition block/partitions/core.c:138 [inline] blk_add_partitions block/partitions/core.c:593 [inline] bdev_disk_changed+0x82c/0x12a4 block/partitions/core.c:697 blkdev_get_whole+0x2a4/0x354 block/bdev.c:661 bdev_open_by_dev+0x2d0/0x7ec block/bdev.c:871 blkdev_open+0x134/0x33c block/fops.c:615 do_dentry_open+0x778/0x12b4 fs/open.c:953 vfs_open+0x7c/0x90 fs/open.c:1087 do_open fs/namei.c:3645 [inline] path_openat+0x1f6c/0x2830 fs/namei.c:3802 do_filp_open+0x1bc/0x3cc fs/namei.c:3829 do_sys_openat2+0x124/0x1b8 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_openat fs/open.c:1435 [inline] __se_sys_openat fs/open.c:1430 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1430 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.0:8713 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:8713 tgid:8712 ppid:6201 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 bdev_release+0x100/0x870 block/bdev.c:969 blkdev_release+0x40/0x54 block/fops.c:631 __fput+0x30c/0x738 fs/file_table.c:376 ____fput+0x20/0x30 fs/file_table.c:404 task_work_run+0x230/0x2e0 kernel/task_work.c:180 get_signal+0x13f4/0x15ec kernel/signal.c:2669 do_signal+0x238/0x3e8c arch/arm64/kernel/signal.c:1308 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.0:8722 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:8722 tgid:8712 ppid:6201 flags:0x0000000d Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 bdev_release+0x100/0x870 block/bdev.c:969 blkdev_release+0x40/0x54 block/fops.c:631 __fput+0x30c/0x738 fs/file_table.c:376 ____fput+0x20/0x30 fs/file_table.c:404 task_work_run+0x230/0x2e0 kernel/task_work.c:180 get_signal+0x13f4/0x15ec kernel/signal.c:2669 do_signal+0x238/0x3e8c arch/arm64/kernel/signal.c:1308 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008ee74ac0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297 2 locks held by getty/5933: #0: ffff0000d26aa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800094ff72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 2 locks held by kworker/u5:2/6199: #0: ffff0000ca6f6938 ((wq_completion)nbd3-recv){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606 #1: ffff800097a77c20 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608 1 lock held by udevd/6214: #0: ffff0000ca8e24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by udevd/6408: #0: ffff0000ca9d14c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by syz-executor.0/8713: #0: ffff0000ca8e24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x100/0x870 block/bdev.c:969 1 lock held by syz-executor.0/8722: #0: ffff0000ca8e24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x100/0x870 block/bdev.c:969 1 lock held by syz-executor.0/9780: #0: ffff0000ca8e24c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x150/0x28c block/bdev.c:1097 1 lock held by syz-executor.0/10585: #0: ffff0000ca8e24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by syz-executor.0/11460: #0: ffff0000ca8e24c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open_by_dev+0x180/0x7ec block/bdev.c:859 1 lock held by syz-executor.3/11567: #0: ffff0000ca9d14c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x100/0x870 block/bdev.c:969 =============================================