------------[ cut here ]------------ kernfs: can not remove 'nr_tags', no directory WARNING: CPU: 1 PID: 5736 at fs/kernfs/dir.c:1656 kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 Modules linked in: CPU: 1 PID: 5736 Comm: syz.0.267 Not tainted 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 lr : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 sp : ffff800020bb7750 x29: ffff800020bb7750 x28: 1fffe00019ccdc32 x27: 0000000000000000 x26: 1fffe00019ccdc31 x25: ffff800015882108 x24: 1ffff000023ea110 x23: dfff800000000000 x22: ffff800015882140 x21: 0000000000000000 x20: 0000000000000000 x19: ffff800011f508e0 x18: ffff800011a7bd00 x17: 1fffe00033ee7176 x16: ffff8000082d1408 x15: 0000000040000000 x14: 0000000000000002 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100 x11: ff0080000a888cd4 x10: 0000000000000003 x9 : 8ddf3f83e775e100 x8 : 8ddf3f83e775e100 x7 : ffff800008250ee4 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011a7d800 x0 : ffff80018a773000 Call trace: kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 kernfs_remove_by_name include/linux/kernfs.h:622 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xf8/0x288 fs/sysfs/group.c:288 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:312 __kobject_del+0x90/0x2d4 lib/kobject.c:587 kobject_del+0x48/0x68 lib/kobject.c:619 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0x198/0x258 block/blk-mq-sysfs.c:309 __blk_mq_update_nr_hw_queues block/blk-mq.c:4753 [inline] blk_mq_update_nr_hw_queues+0x4d4/0xefc block/blk-mq.c:4799 nbd_start_device+0x14c/0xae8 drivers/block/nbd.c:1375 nbd_start_device_ioctl drivers/block/nbd.c:1426 [inline] __nbd_ioctl drivers/block/nbd.c:1502 [inline] nbd_ioctl+0x520/0xc5c drivers/block/nbd.c:1542 blkdev_ioctl+0x620/0xb28 block/ioctl.c:620 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+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 1886 hardirqs last enabled at (1885): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (1885): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (1886): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1868): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (1868): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (1863): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'nr_reserved_tags', no directory WARNING: CPU: 1 PID: 5736 at fs/kernfs/dir.c:1656 kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 Modules linked in: CPU: 1 PID: 5736 Comm: syz.0.267 Tainted: G W 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 lr : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 sp : ffff800020bb7750 x29: ffff800020bb7750 x28: 1fffe00019ccdc32 x27: 0000000000000000 x26: 1fffe00019ccdc31 x25: ffff800015882110 x24: 1ffff000023ea110 x23: dfff800000000000 x22: ffff8000158821a0 x21: 0000000000000000 x20: 0000000000000000 x19: ffff800011f50920 x18: 0000000000400008 x17: 0000000000080000 x16: 000000000001ffff x15: ffff80002382a000 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100 x11: ff00800008190bec x10: 0000000000000003 x9 : 8ddf3f83e775e100 x8 : 8ddf3f83e775e100 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800020bb71d8 x4 : ffff8000151546c0 x3 : ffff80000852d748 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 kernfs_remove_by_name include/linux/kernfs.h:622 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xf8/0x288 fs/sysfs/group.c:288 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:312 __kobject_del+0x90/0x2d4 lib/kobject.c:587 kobject_del+0x48/0x68 lib/kobject.c:619 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0x198/0x258 block/blk-mq-sysfs.c:309 __blk_mq_update_nr_hw_queues block/blk-mq.c:4753 [inline] blk_mq_update_nr_hw_queues+0x4d4/0xefc block/blk-mq.c:4799 nbd_start_device+0x14c/0xae8 drivers/block/nbd.c:1375 nbd_start_device_ioctl drivers/block/nbd.c:1426 [inline] __nbd_ioctl drivers/block/nbd.c:1502 [inline] nbd_ioctl+0x520/0xc5c drivers/block/nbd.c:1542 blkdev_ioctl+0x620/0xb28 block/ioctl.c:620 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+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 2246 hardirqs last enabled at (2245): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (2246): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (2220): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (2220): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (1889): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'cpu_list', no directory WARNING: CPU: 0 PID: 5736 at fs/kernfs/dir.c:1656 kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 Modules linked in: CPU: 0 PID: 5736 Comm: syz.0.267 Tainted: G W 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 lr : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 sp : ffff800020bb7750 x29: ffff800020bb7750 x28: 1fffe00019ccdc32 x27: 0000000000000000 x26: 1fffe00019ccdc31 x25: ffff800015882118 x24: 1ffff000023ea110 x23: dfff800000000000 x22: ffff800015882200 x21: 0000000000000000 x20: 0000000000000000 x19: ffff800011f50960 x18: 0000000000400008 x17: 0000000000080000 x16: 000000000001ffff x15: ffff80002382a000 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100 x11: ff00800008190bec x10: 0000000000000003 x9 : 8ddf3f83e775e100 x8 : 8ddf3f83e775e100 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800020bb71d8 x4 : ffff8000151546c0 x3 : ffff80000852d748 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 kernfs_remove_by_name include/linux/kernfs.h:622 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xf8/0x288 fs/sysfs/group.c:288 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:312 __kobject_del+0x90/0x2d4 lib/kobject.c:587 kobject_del+0x48/0x68 lib/kobject.c:619 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0x198/0x258 block/blk-mq-sysfs.c:309 __blk_mq_update_nr_hw_queues block/blk-mq.c:4753 [inline] blk_mq_update_nr_hw_queues+0x4d4/0xefc block/blk-mq.c:4799 nbd_start_device+0x14c/0xae8 drivers/block/nbd.c:1375 nbd_start_device_ioctl drivers/block/nbd.c:1426 [inline] __nbd_ioctl drivers/block/nbd.c:1502 [inline] nbd_ioctl+0x520/0xc5c drivers/block/nbd.c:1542 blkdev_ioctl+0x620/0xb28 block/ioctl.c:620 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+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 2560 hardirqs last enabled at (2559): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (2560): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (2532): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (2532): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (2249): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'nr_tags', no directory WARNING: CPU: 0 PID: 5736 at fs/kernfs/dir.c:1656 kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 Modules linked in: CPU: 0 PID: 5736 Comm: syz.0.267 Tainted: G W 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 lr : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 sp : ffff800020bb7750 x29: ffff800020bb7750 x28: 1fffe0001b9c6132 x27: 0000000000000000 x26: 1fffe0001b9c6131 x25: ffff800015882108 x24: 1ffff000023ea110 x23: dfff800000000000 x22: ffff800015882140 x21: 0000000000000000 x20: 0000000000000000 x19: ffff800011f508e0 x18: ffff800011a7bd00 x17: ffff8000181a0000 x16: ffff8000082d1408 x15: ffff800017c80fc0 x14: ffff0000cf675dd8 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100 x11: ff0080000819b9f8 x10: 0000000000000003 x9 : 8ddf3f83e775e100 x8 : 8ddf3f83e775e100 x7 : ffff80000a88ae7c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000819b9a0 x2 : 0000000000000001 x1 : 0000000000000002 x0 : 0000000000000001 Call trace: kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 kernfs_remove_by_name include/linux/kernfs.h:622 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xf8/0x288 fs/sysfs/group.c:288 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:312 __kobject_del+0x90/0x2d4 lib/kobject.c:587 kobject_del+0x48/0x68 lib/kobject.c:619 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0x198/0x258 block/blk-mq-sysfs.c:309 __blk_mq_update_nr_hw_queues block/blk-mq.c:4753 [inline] blk_mq_update_nr_hw_queues+0x4d4/0xefc block/blk-mq.c:4799 nbd_start_device+0x14c/0xae8 drivers/block/nbd.c:1375 nbd_start_device_ioctl drivers/block/nbd.c:1426 [inline] __nbd_ioctl drivers/block/nbd.c:1502 [inline] nbd_ioctl+0x520/0xc5c drivers/block/nbd.c:1542 blkdev_ioctl+0x620/0xb28 block/ioctl.c:620 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+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 2920 hardirqs last enabled at (2919): [] call_rcu+0x590/0x948 kernel/rcu/tree.c:2880 hardirqs last disabled at (2920): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (2880): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (2880): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (2563): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'nr_reserved_tags', no directory WARNING: CPU: 0 PID: 5736 at fs/kernfs/dir.c:1656 kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 Modules linked in: CPU: 0 PID: 5736 Comm: syz.0.267 Tainted: G W 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 lr : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 sp : ffff800020bb7750 x29: ffff800020bb7750 x28: 1fffe0001b9c6132 x27: 0000000000000000 x26: 1fffe0001b9c6131 x25: ffff800015882110 x24: 1ffff000023ea110 x23: dfff800000000000 x22: ffff8000158821a0 x21: 0000000000000000 x20: 0000000000000000 x19: ffff800011f50920 x18: ffff800011a7bd00 x17: 1fffe00033ee2f76 x16: ffff8000082d1408 x15: 0000000040000000 x14: 0000000000000002 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100 x11: ff0080000a888cd4 x10: 0000000000000003 x9 : 8ddf3f83e775e100 x8 : 8ddf3f83e775e100 x7 : ffff800008250ee4 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011a7d800 x0 : ffff80018a752000 Call trace: kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 kernfs_remove_by_name include/linux/kernfs.h:622 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xf8/0x288 fs/sysfs/group.c:288 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:312 __kobject_del+0x90/0x2d4 lib/kobject.c:587 kobject_del+0x48/0x68 lib/kobject.c:619 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0x198/0x258 block/blk-mq-sysfs.c:309 __blk_mq_update_nr_hw_queues block/blk-mq.c:4753 [inline] blk_mq_update_nr_hw_queues+0x4d4/0xefc block/blk-mq.c:4799 nbd_start_device+0x14c/0xae8 drivers/block/nbd.c:1375 nbd_start_device_ioctl drivers/block/nbd.c:1426 [inline] __nbd_ioctl drivers/block/nbd.c:1502 [inline] nbd_ioctl+0x520/0xc5c drivers/block/nbd.c:1542 blkdev_ioctl+0x620/0xb28 block/ioctl.c:620 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+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 3004 hardirqs last enabled at (3003): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (3003): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (3004): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (2974): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (2974): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (2923): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernfs: can not remove 'cpu_list', no directory WARNING: CPU: 0 PID: 5736 at fs/kernfs/dir.c:1656 kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 Modules linked in: CPU: 0 PID: 5736 Comm: syz.0.267 Tainted: G W 6.1.138-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 lr : kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 sp : ffff800020bb7750 x29: ffff800020bb7750 x28: 1fffe0001b9c6132 x27: 0000000000000000 x26: 1fffe0001b9c6131 x25: ffff800015882118 x24: 1ffff000023ea110 x23: dfff800000000000 x22: ffff800015882200 x21: 0000000000000000 x20: 0000000000000000 x19: ffff800011f50960 x18: ffff800011a7bd00 x17: 1fffe00033ee2f76 x16: ffff8000082d1408 x15: 0000000040000000 x14: 0000000000000002 x13: 1ffff00002a0e0b1 x12: 0000000000ff0100 x11: ff0080000a888cd4 x10: 0000000000000003 x9 : 8ddf3f83e775e100 x8 : 8ddf3f83e775e100 x7 : ffff800008250ee4 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff800011a7d800 x0 : ffff80018a752000 Call trace: kernfs_remove_by_name_ns+0x104/0x184 fs/kernfs/dir.c:1655 kernfs_remove_by_name include/linux/kernfs.h:622 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xf8/0x288 fs/sysfs/group.c:288 sysfs_remove_groups+0x5c/0xb4 fs/sysfs/group.c:312 __kobject_del+0x90/0x2d4 lib/kobject.c:587 kobject_del+0x48/0x68 lib/kobject.c:619 blk_mq_unregister_hctx block/blk-mq-sysfs.c:181 [inline] blk_mq_sysfs_unregister_hctxs+0x198/0x258 block/blk-mq-sysfs.c:309 __blk_mq_update_nr_hw_queues block/blk-mq.c:4753 [inline] blk_mq_update_nr_hw_queues+0x4d4/0xefc block/blk-mq.c:4799 nbd_start_device+0x14c/0xae8 drivers/block/nbd.c:1375 nbd_start_device_ioctl drivers/block/nbd.c:1426 [inline] __nbd_ioctl drivers/block/nbd.c:1502 [inline] nbd_ioctl+0x520/0xc5c drivers/block/nbd.c:1542 blkdev_ioctl+0x620/0xb28 block/ioctl.c:620 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+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 3256 hardirqs last enabled at (3255): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (3255): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (3256): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (3226): [] softirq_handle_end kernel/softirq.c:421 [inline] softirqs last enabled at (3226): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:606 softirqs last disabled at (3007): [] __do_softirq+0x14/0x20 kernel/softirq.c:612 ---[ end trace 0000000000000000 ]---