INFO: task syz-executor427:3076 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor427 state:D stack:    0 pid: 3076 ppid:  3066 flags:0x00000001
Call trace:
 __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557
 context_switch kernel/sched/core.c:5182 [inline]
 __schedule+0x414/0x5a0 kernel/sched/core.c:6494
 schedule+0x64/0xa4 kernel/sched/core.c:6570
 blk_mq_freeze_queue_wait+0x94/0xf4 block/blk-mq.c:180
 blk_freeze_queue+0x94/0xa8 block/blk-mq.c:207
 blk_mq_freeze_queue+0x20/0x30 block/blk-mq.c:216
 nbd_add_socket+0x78/0x27c drivers/block/nbd.c:1123
 __nbd_ioctl+0x80/0x334 drivers/block/nbd.c:1464
 nbd_ioctl+0xec/0x13c drivers/block/nbd.c:1521
 blkdev_ioctl+0x24c/0x6d8 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0xd0/0x140 fs/ioctl.c:856
 __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+0x48/0x164 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
INFO: task udevd:3077 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:    0 pid: 3077 ppid:  2561 flags:0x00000000
Call trace:
 __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557
 context_switch kernel/sched/core.c:5182 [inline]
 __schedule+0x414/0x5a0 kernel/sched/core.c:6494
 schedule+0x64/0xa4 kernel/sched/core.c:6570
 io_schedule+0x38/0xbc kernel/sched/core.c:8714
 folio_wait_bit_common+0x458/0xa44 mm/filemap.c:1298
 folio_put_wait_locked mm/filemap.c:1472 [inline]
 do_read_cache_folio+0x78/0x588 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:717
 adfspart_check_ICS+0x4c/0x3b4 block/partitions/acorn.c:360
 check_partition block/partitions/core.c:146 [inline]
 blk_add_partitions block/partitions/core.c:602 [inline]
 bdev_disk_changed+0x364/0x66c block/partitions/core.c:688
 blkdev_get_whole+0x1b0/0x208 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+0x330/0x6d0 fs/open.c:880
 vfs_open+0x38/0x48 fs/open.c:1016
 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:1313
 do_sys_open fs/open.c:1329 [inline]
 __do_sys_openat fs/open.c:1345 [inline]
 __se_sys_openat fs/open.c:1340 [inline]
 __arm64_sys_openat+0xb0/0xe0 fs/open.c:1340
 __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+0x48/0x164 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/11:
 #0: ffff80000d433568 (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/12:
 #0: ffff80000d433bb8 (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/27:
 #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279
2 locks held by getty/2717:
 #0: ffff0000c62d9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244
 #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177
1 lock held by syz-executor427/3076:
 #0: ffff0000c0f58d98 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c drivers/block/nbd.c:1514
1 lock held by udevd/3077:
 #0: ffff0000c4abfcc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812

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