------------[ cut here ]------------ kernfs: can not remove 'nr_tags', no directory WARNING: CPU: 1 PID: 3053 at fs/kernfs/dir.c:1580 kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 Modules linked in: CPU: 1 PID: 3053 Comm: syz-executor232 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 lr : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 sp : ffff800012713a60 x29: ffff800012713a60 x28: ffff80000cf01000 x27: ffff0000c5252908 x26: ffff0000c5252908 x25: ffff800012713b88 x24: ffff0000c8f38d80 x23: ffff0000c4ce0000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80000cc5b39c x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff0000c7671a80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c7671a80 x11: ff808000081c0d5c x10: 0000000000000000 x9 : 47d6d2f616dd0600 x8 : 47d6d2f616dd0600 x7 : ffff80000819545c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 000000000000002e Call trace: kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x68/0x160 fs/sysfs/group.c:288 sysfs_remove_groups+0x3c/0x78 fs/sysfs/group.c:312 __kobject_del+0x34/0x1f8 lib/kobject.c:579 kobject_del+0x28/0x110 lib/kobject.c:611 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0xc4/0x13c block/blk-mq-sysfs.c:302 __blk_mq_update_nr_hw_queues block/blk-mq.c:4548 [inline] blk_mq_update_nr_hw_queues+0x254/0x6e0 block/blk-mq.c:4594 nbd_start_device+0xc4/0x500 drivers/block/nbd.c:1357 nbd_start_device_ioctl+0x3c/0x25c drivers/block/nbd.c:1407 __nbd_ioctl+0x16c/0x334 drivers/block/nbd.c:1481 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 irq event stamp: 2750 hardirqs last enabled at (2749): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264 hardirqs last disabled at (2750): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (222): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (220): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'nr_reserved_tags', no directory WARNING: CPU: 1 PID: 3053 at fs/kernfs/dir.c:1580 kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 Modules linked in: CPU: 1 PID: 3053 Comm: syz-executor232 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 lr : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 sp : ffff800012713a60 x29: ffff800012713a60 x28: ffff80000cf01000 x27: ffff0000c5252908 x26: ffff0000c5252908 x25: ffff800012713b88 x24: ffff0000c8f38d80 x23: ffff0000c4ce0000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80000cc5b3a4 x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff0000c7671a80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c7671a80 x11: ff808000081c0d5c x10: 0000000000000000 x9 : 47d6d2f616dd0600 x8 : 47d6d2f616dd0600 x7 : ffff80000819545c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefddcd0 x1 : 0000000100000000 x0 : 0000000000000037 Call trace: kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x68/0x160 fs/sysfs/group.c:288 sysfs_remove_groups+0x3c/0x78 fs/sysfs/group.c:312 __kobject_del+0x34/0x1f8 lib/kobject.c:579 kobject_del+0x28/0x110 lib/kobject.c:611 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0xc4/0x13c block/blk-mq-sysfs.c:302 __blk_mq_update_nr_hw_queues block/blk-mq.c:4548 [inline] blk_mq_update_nr_hw_queues+0x254/0x6e0 block/blk-mq.c:4594 nbd_start_device+0xc4/0x500 drivers/block/nbd.c:1357 nbd_start_device_ioctl+0x3c/0x25c drivers/block/nbd.c:1407 __nbd_ioctl+0x16c/0x334 drivers/block/nbd.c:1481 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 irq event stamp: 2796 hardirqs last enabled at (2795): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264 hardirqs last disabled at (2796): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (2774): [] _stext+0x2e4/0x37c softirqs last disabled at (2753): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'cpu_list', no directory WARNING: CPU: 1 PID: 3053 at fs/kernfs/dir.c:1580 kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 Modules linked in: CPU: 1 PID: 3053 Comm: syz-executor232 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 lr : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 sp : ffff800012713a60 x29: ffff800012713a60 x28: ffff80000cf01000 x27: ffff0000c5252908 x26: ffff0000c5252908 x25: ffff800012713b88 x24: ffff0000c8f38d80 x23: ffff0000c4ce0000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80000cca5e6c x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff0000c7671a80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c7671a80 x11: ff808000081c0d5c x10: 0000000000000000 x9 : 47d6d2f616dd0600 x8 : 47d6d2f616dd0600 x7 : ffff80000819545c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefddcd0 x1 : 0000000100000000 x0 : 000000000000002f Call trace: kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x68/0x160 fs/sysfs/group.c:288 sysfs_remove_groups+0x3c/0x78 fs/sysfs/group.c:312 __kobject_del+0x34/0x1f8 lib/kobject.c:579 kobject_del+0x28/0x110 lib/kobject.c:611 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0xc4/0x13c block/blk-mq-sysfs.c:302 __blk_mq_update_nr_hw_queues block/blk-mq.c:4548 [inline] blk_mq_update_nr_hw_queues+0x254/0x6e0 block/blk-mq.c:4594 nbd_start_device+0xc4/0x500 drivers/block/nbd.c:1357 nbd_start_device_ioctl+0x3c/0x25c drivers/block/nbd.c:1407 __nbd_ioctl+0x16c/0x334 drivers/block/nbd.c:1481 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 irq event stamp: 2836 hardirqs last enabled at (2835): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264 hardirqs last disabled at (2836): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (2814): [] _stext+0x2e4/0x37c softirqs last disabled at (2799): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'nr_tags', no directory WARNING: CPU: 1 PID: 3053 at fs/kernfs/dir.c:1580 kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 Modules linked in: CPU: 1 PID: 3053 Comm: syz-executor232 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 lr : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 sp : ffff800012713a60 x29: ffff800012713a60 x28: ffff80000cf01000 x27: ffff0000c5252908 x26: ffff0000c5252908 x25: ffff800012713b88 x24: ffff0000c8f38d80 x23: ffff0000c4ce0000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80000cc5b39c x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff0000c7671a80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c7671a80 x11: ff808000081c0d5c x10: 0000000000000000 x9 : 47d6d2f616dd0600 x8 : 47d6d2f616dd0600 x7 : ffff800008161d1c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefddcd0 x1 : 0000000100000000 x0 : 000000000000002e Call trace: kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x68/0x160 fs/sysfs/group.c:288 sysfs_remove_groups+0x3c/0x78 fs/sysfs/group.c:312 __kobject_del+0x34/0x1f8 lib/kobject.c:579 kobject_del+0x28/0x110 lib/kobject.c:611 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0xc4/0x13c block/blk-mq-sysfs.c:302 __blk_mq_update_nr_hw_queues block/blk-mq.c:4548 [inline] blk_mq_update_nr_hw_queues+0x254/0x6e0 block/blk-mq.c:4594 nbd_start_device+0xc4/0x500 drivers/block/nbd.c:1357 nbd_start_device_ioctl+0x3c/0x25c drivers/block/nbd.c:1407 __nbd_ioctl+0x16c/0x334 drivers/block/nbd.c:1481 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 irq event stamp: 3636 hardirqs last enabled at (3635): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (3635): [] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (3636): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (3628): [] _stext+0x2e4/0x37c softirqs last disabled at (2885): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'nr_reserved_tags', no directory WARNING: CPU: 1 PID: 3053 at fs/kernfs/dir.c:1580 kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 Modules linked in: CPU: 1 PID: 3053 Comm: syz-executor232 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 lr : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 sp : ffff800012713a60 x29: ffff800012713a60 x28: ffff80000cf01000 x27: ffff0000c5252908 x26: ffff0000c5252908 x25: ffff800012713b88 x24: ffff0000c8f38d80 x23: ffff0000c4ce0000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80000cc5b3a4 x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff0000c7671a80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c7671a80 x11: ff808000081c0d5c x10: 0000000000000000 x9 : 47d6d2f616dd0600 x8 : 47d6d2f616dd0600 x7 : ffff80000819545c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefddcd0 x1 : 0000000100000000 x0 : 0000000000000037 Call trace: kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x68/0x160 fs/sysfs/group.c:288 sysfs_remove_groups+0x3c/0x78 fs/sysfs/group.c:312 __kobject_del+0x34/0x1f8 lib/kobject.c:579 kobject_del+0x28/0x110 lib/kobject.c:611 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0xc4/0x13c block/blk-mq-sysfs.c:302 __blk_mq_update_nr_hw_queues block/blk-mq.c:4548 [inline] blk_mq_update_nr_hw_queues+0x254/0x6e0 block/blk-mq.c:4594 nbd_start_device+0xc4/0x500 drivers/block/nbd.c:1357 nbd_start_device_ioctl+0x3c/0x25c drivers/block/nbd.c:1407 __nbd_ioctl+0x16c/0x334 drivers/block/nbd.c:1481 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 irq event stamp: 3672 hardirqs last enabled at (3671): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264 hardirqs last disabled at (3672): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (3650): [] _stext+0x2e4/0x37c softirqs last disabled at (3639): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'cpu_list', no directory WARNING: CPU: 1 PID: 3053 at fs/kernfs/dir.c:1580 kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 Modules linked in: CPU: 1 PID: 3053 Comm: syz-executor232 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 lr : kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 sp : ffff800012713a60 x29: ffff800012713a60 x28: ffff80000cf01000 x27: ffff0000c5252908 x26: ffff0000c5252908 x25: ffff800012713b88 x24: ffff0000c8f38d80 x23: ffff0000c4ce0000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80000cca5e6c x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dd0b198 x16: ffff80000db49158 x15: ffff0000c7671a80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c7671a80 x11: ff808000081c0d5c x10: 0000000000000000 x9 : 47d6d2f616dd0600 x8 : 47d6d2f616dd0600 x7 : ffff80000819545c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 000000000000002f Call trace: kernfs_remove_by_name_ns+0x84/0xb8 fs/kernfs/dir.c:1579 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x68/0x160 fs/sysfs/group.c:288 sysfs_remove_groups+0x3c/0x78 fs/sysfs/group.c:312 __kobject_del+0x34/0x1f8 lib/kobject.c:579 kobject_del+0x28/0x110 lib/kobject.c:611 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0xc4/0x13c block/blk-mq-sysfs.c:302 __blk_mq_update_nr_hw_queues block/blk-mq.c:4548 [inline] blk_mq_update_nr_hw_queues+0x254/0x6e0 block/blk-mq.c:4594 nbd_start_device+0xc4/0x500 drivers/block/nbd.c:1357 nbd_start_device_ioctl+0x3c/0x25c drivers/block/nbd.c:1407 __nbd_ioctl+0x16c/0x334 drivers/block/nbd.c:1481 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 irq event stamp: 3714 hardirqs last enabled at (3713): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:264 hardirqs last disabled at (3714): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (3692): [] _stext+0x2e4/0x37c softirqs last disabled at (3675): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 ---[ end trace 0000000000000000 ]--- debugfs: out of free dentries, can not create directory 'hctx0' block nbd0: shutting down sockets