INFO: task udevd:5953 blocked for more than 430 seconds. Tainted: G W 6.10.0-rc3-syzkaller-00174-ga3e18a540541 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:5953 tgid:5953 ppid:3015 flags:0x00000005 Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5408 [inline] __schedule+0xad4/0x2b18 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6837 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x4e8/0x840 kernel/locking/mutex.c:752 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:804 bdev_open+0x2c4/0xa48 block/bdev.c:897 blkdev_open+0x114/0x194 block/fops.c:615 do_dentry_open+0x510/0x12e8 fs/open.c:955 vfs_open+0x54/0x8c fs/open.c:1089 do_open fs/namei.c:3650 [inline] path_openat+0x14a0/0x20ec fs/namei.c:3807 do_filp_open+0x16c/0x330 fs/namei.c:3834 do_sys_openat2+0x12c/0x160 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_openat fs/open.c:1436 [inline] __se_sys_openat fs/open.c:1431 [inline] __arm64_sys_openat+0x12c/0x1b8 fs/open.c:1431 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x6c/0x25c arch/arm64/kernel/syscall.c:48 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:133 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.1:6089 blocked for more than 430 seconds. Tainted: G W 6.10.0-rc3-syzkaller-00174-ga3e18a540541 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:6089 tgid:6089 ppid:2034 flags:0x00000005 Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5408 [inline] __schedule+0xad4/0x2b18 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6837 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x4e8/0x840 kernel/locking/mutex.c:752 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:804 bdev_release+0x104/0x510 block/bdev.c:1080 blkdev_release+0x14/0x24 block/fops.c:623 __fput+0x2bc/0x95c fs/file_table.c:422 ____fput+0x10/0x1c fs/file_table.c:450 task_work_run+0x124/0x20c kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x1d4/0x25c arch/arm64/kernel/entry-common.c:151 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+0x100/0x180 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.1:6090 blocked for more than 430 seconds. Tainted: G W 6.10.0-rc3-syzkaller-00174-ga3e18a540541 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:6090 tgid:6089 ppid:2034 flags:0x0000000d Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5408 [inline] __schedule+0xad4/0x2b18 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6837 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x4e8/0x840 kernel/locking/mutex.c:752 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:804 bdev_release+0x104/0x510 block/bdev.c:1080 blkdev_release+0x14/0x24 block/fops.c:623 __fput+0x2bc/0x95c fs/file_table.c:422 ____fput+0x10/0x1c fs/file_table.c:450 task_work_run+0x124/0x20c kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x1d4/0x25c arch/arm64/kernel/entry-common.c:151 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+0x100/0x180 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz-executor.1:6094 blocked for more than 430 seconds. Tainted: G W 6.10.0-rc3-syzkaller-00174-ga3e18a540541 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:6094 tgid:6089 ppid:2034 flags:0x0000000d Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5408 [inline] __schedule+0xad4/0x2b18 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xd0/0x304 kernel/sched/core.c:6837 io_schedule+0xac/0x114 kernel/sched/core.c:9043 folio_wait_bit_common+0x2a8/0x6d0 mm/filemap.c:1307 folio_put_wait_locked mm/filemap.c:1471 [inline] do_read_cache_folio+0x200/0x428 mm/filemap.c:3770 read_cache_folio+0x44/0x6c mm/filemap.c:3820 read_mapping_folio include/linux/pagemap.h:902 [inline] read_part_sector+0xac/0x2b0 block/partitions/core.c:712 msdos_partition+0x10c/0x1df8 block/partitions/msdos.c:592 check_partition block/partitions/core.c:138 [inline] blk_add_partitions block/partitions/core.c:579 [inline] bdev_disk_changed+0x504/0xebc block/partitions/core.c:683 blkdev_get_whole+0x144/0x1e4 block/bdev.c:700 bdev_open+0x1dc/0xa48 block/bdev.c:909 blkdev_open+0x114/0x194 block/fops.c:615 do_dentry_open+0x510/0x12e8 fs/open.c:955 vfs_open+0x54/0x8c fs/open.c:1089 do_open fs/namei.c:3650 [inline] path_openat+0x14a0/0x20ec fs/namei.c:3807 do_filp_open+0x16c/0x330 fs/namei.c:3834 do_sys_openat2+0x12c/0x160 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_openat fs/open.c:1436 [inline] __se_sys_openat fs/open.c:1431 [inline] __arm64_sys_openat+0x12c/0x1b8 fs/open.c:1431 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x6c/0x25c arch/arm64/kernel/syscall.c:48 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:133 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x100/0x12c 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/31: #0: ffff800086a2e100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x44/0x2d4 kernel/locking/lockdep.c:6608 4 locks held by dhcpcd/3045: 2 locks held by getty/3134: #0: ffff000010cf90a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008988d2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x93c/0xe9c drivers/tty/n_tty.c:2201 2 locks held by syz-fuzzer/3199: 1 lock held by udevd/4315: #0: ffff0000109a44c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by udevd/5953: #0: ffff000010a504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.1/6089: #0: ffff000010a504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x104/0x510 block/bdev.c:1080 1 lock held by syz-executor.1/6090: #0: ffff000010a504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x104/0x510 block/bdev.c:1080 1 lock held by syz-executor.1/6094: #0: ffff000010a504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.0/6329: #0: ffff0000109a44c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x104/0x510 block/bdev.c:1080 1 lock held by syz-executor.0/6330: #0: ffff0000109a44c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x104/0x510 block/bdev.c:1080 1 lock held by syz-executor.0/6334: #0: ffff0000109a44c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.1/6619: #0: ffff000010a504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.1/6622: #0: ffff000010a504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.1/6625: #0: ffff000010a504c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.0/6859: #0: ffff0000109a44c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.0/6862: #0: ffff0000109a44c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.0/6864: #0: ffff0000109a44c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x2c4/0xa48 block/bdev.c:897 1 lock held by syz-executor.0/7291: #0: ffff800086a36cb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x24c/0x36c kernel/rcu/tree_exp.h:291 =============================================