======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc2-syzkaller-g21f1b85c8912 #0 Not tainted
------------------------------------------------------
syz.3.535/11549 is trying to acquire lock:
ff60000014f26e10 (set->srcu){.+.+}-{0:0}, at: list_empty include/linux/list.h:373 [inline]
ff60000014f26e10 (set->srcu){.+.+}-{0:0}, at: srcu_funnel_gp_start kernel/rcu/srcutree.c:1090 [inline]
ff60000014f26e10 (set->srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x0/0x292 kernel/rcu/srcutree.c:1339
but task is already holding lock:
ff60000019dfd3d0 (&q->sysfs_lock){+.+.}-{4:4}, at: blk_mq_elv_switch_none block/blk-mq.c:4925 [inline]
ff60000019dfd3d0 (&q->sysfs_lock){+.+.}-{4:4}, at: __blk_mq_update_nr_hw_queues+0x41e/0x1326 block/blk-mq.c:5003
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #7 (&q->sysfs_lock){+.+.}-{4:4}:
lock_acquire.part.0+0x2c4/0x81a kernel/locking/lockdep.c:5849
lock_acquire+0x74/0x98 kernel/locking/lockdep.c:5822
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x166/0x1082 kernel/locking/mutex.c:735
mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:787
blk_mq_elv_switch_none block/blk-mq.c:4925 [inline]
__blk_mq_update_nr_hw_queues+0x41e/0x1326 block/blk-mq.c:5003
blk_mq_update_nr_hw_queues+0x32/0x4a block/blk-mq.c:5063
nbd_start_device+0x140/0xc00 drivers/block/nbd.c:1413
nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline]
__nbd_ioctl drivers/block/nbd.c:1539 [inline]
nbd_ioctl+0x474/0xd90 drivers/block/nbd.c:1579
blkdev_ioctl+0x23c/0xca0 block/ioctl.c:693
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__riscv_sys_ioctl+0x18e/0x1e2 fs/ioctl.c:892
syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
_new_vmalloc_restore_context_a0+0xc2/0xce
-> #6 (&q->q_usage_counter(io)#22){++++}-{0:0}:
lock_acquire.part.0+0x2c4/0x81a kernel/locking/lockdep.c:5849
lock_acquire+0x74/0x98 kernel/locking/lockdep.c:5822
bio_queue_enter block/blk.h:75 [inline]
blk_mq_submit_bio+0x20d2/0x26be block/blk-mq.c:3092
__submit_bio+0x32e/0x492 block/blk-core.c:629
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x740/0xe36 block/blk-core.c:739
submit_bio_noacct+0xa96/0x1e04 block/blk-core.c:868
submit_bio+0xc8/0x4f2 block/blk-core.c:910
submit_bh_wbc+0x42a/0x5a8 fs/buffer.c:2814
submit_bh fs/buffer.c:2819 [inline]
block_read_full_folio+0x6e6/0x90a fs/buffer.c:2446
blkdev_read_folio+0x26/0x30 block/fops.c:442
filemap_read_folio+0xc2/0x272 mm/filemap.c:2366
filemap_update_page mm/filemap.c:2450 [inline]
filemap_get_pages+0x126c/0x1ba0 mm/filemap.c:2571
filemap_read+0x366/0xc52 mm/filemap.c:2646
blkdev_read_iter+0x164/0x416 block/fops.c:770
do_iter_readv_writev+0x55a/0x686 fs/read_write.c:818
vfs_readv+0x414/0x70c fs/read_write.c:1011
do_preadv+0x1b4/0x250 fs/read_write.c:1125
__do_sys_preadv fs/read_write.c:1172 [inline]
__se_sys_preadv fs/read_write.c:1167 [inline]
__riscv_sys_preadv+0x88/0xc4 fs/read_write.c:1167
syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
_new_vmalloc_restore_context_a0+0xc2/0xce
-> #5 (mapping.invalidate_lock#2){++++}-{4:4}:
lock_acquire.part.0+0x2c4/0x81a kernel/locking/lockdep.c:5849
lock_acquire+0x74/0x98 kernel/locking/lockdep.c:5822
down_read+0xa4/0x45e kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:873 [inline]
filemap_fault+0x8ca/0x2c46 mm/filemap.c:3332
__do_fault+0xf4/0x4de mm/memory.c:4907
do_shared_fault mm/memory.c:5386 [inline]
do_fault mm/memory.c:5460 [inline]
do_pte_missing mm/memory.c:3979 [inline]
handle_pte_fault mm/memory.c:5801 [inline]
__handle_mm_fault+0x1770/0x4292 mm/memory.c:5944
handle_mm_fault+0x48c/0x886 mm/memory.c:6112
faultin_page mm/gup.c:1196 [inline]
__get_user_pages+0xb7a/0x35ec mm/gup.c:1494
__get_user_pages_locked mm/gup.c:1760 [inline]
faultin_page_range+0x246/0x932 mm/gup.c:1984
madvise_populate mm/madvise.c:951 [inline]
do_madvise+0x5ce/0x7f2 mm/madvise.c:1681
__do_sys_madvise mm/madvise.c:1700 [inline]
__se_sys_madvise mm/madvise.c:1698 [inline]
__riscv_sys_madvise+0x88/0xdc mm/madvise.c:1698
syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
_new_vmalloc_restore_context_a0+0xc2/0xce
-> #4 (&mm->mmap_lock){++++}-{4:4}:
lock_acquire.part.0+0x2c4/0x81a kernel/locking/lockdep.c:5849
lock_acquire+0x74/0x98 kernel/locking/lockdep.c:5822
__might_fault mm/memory.c:6751 [inline]
__might_fault+0xdc/0x138 mm/memory.c:6744
_copy_from_iter+0x120/0x1a38 lib/iov_iter.c:259
copy_from_iter include/linux/uio.h:219 [inline]
copy_from_iter_full include/linux/uio.h:236 [inline]
skb_do_copy_data_nocache include/net/sock.h:2187 [inline]
skb_copy_to_page_nocache include/net/sock.h:2213 [inline]
tcp_sendmsg_locked+0x247e/0x3696 net/ipv4/tcp.c:1222
tcp_sendmsg+0x32/0x4e net/ipv4/tcp.c:1358
inet_sendmsg+0x9c/0xda net/ipv4/af_inet.c:851
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg+0xcc/0x160 net/socket.c:726
sock_write_iter+0x2a0/0x3ba net/socket.c:1147
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x56c/0xa94 fs/read_write.c:679
ksys_write+0x200/0x226 fs/read_write.c:731
__do_sys_write fs/read_write.c:742 [inline]
__se_sys_write fs/read_write.c:739 [inline]
__riscv_sys_write+0x6e/0x94 fs/read_write.c:739
syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
_new_vmalloc_restore_context_a0+0xc2/0xce
-> #3 (sk_lock-AF_INET){+.+.}-{0:0}:
lock_acquire.part.0+0x2c4/0x81a kernel/locking/lockdep.c:5849
lock_acquire+0x74/0x98 kernel/locking/lockdep.c:5822
lock_sock_nested+0x38/0xf6 net/core/sock.c:3622
lock_sock include/net/sock.h:1617 [inline]
inet_shutdown+0x6c/0x41c net/ipv4/af_inet.c:905
kernel_sock_shutdown+0x58/0x7a net/socket.c:3670
nbd_mark_nsock_dead+0xb4/0x520 drivers/block/nbd.c:314
recv_work+0x680/0x9d2 drivers/block/nbd.c:957
process_one_work+0x968/0x1f38 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x5be/0xdc6 kernel/workqueue.c:3391
kthread+0x28c/0x3a4 kernel/kthread.c:389
ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326
-> #2 (&nsock->tx_lock){+.+.}-{4:4}:
lock_acquire.part.0+0x2c4/0x81a kernel/locking/lockdep.c:5849
lock_acquire+0x74/0x98 kernel/locking/lockdep.c:5822
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x166/0x1082 kernel/locking/mutex.c:735
mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:787
nbd_handle_cmd drivers/block/nbd.c:1079 [inline]
nbd_queue_rq+0x3b8/0xe6a drivers/block/nbd.c:1143
blk_mq_dispatch_rq_list+0x3f0/0x1ab6 block/blk-mq.c:2120
__blk_mq_do_dispatch_sched block/blk-mq-sched.c:170 [inline]
blk_mq_do_dispatch_sched block/blk-mq-sched.c:184 [inline]
__blk_mq_sched_dispatch_requests+0xaee/0x1370 block/blk-mq-sched.c:309
blk_mq_sched_dispatch_requests+0xb6/0x17c block/blk-mq-sched.c:331
blk_mq_run_hw_queue+0x28c/0x6ba block/blk-mq.c:2354
blk_mq_dispatch_plug_list block/blk-mq.c:2864 [inline]
blk_mq_flush_plug_list+0x63c/0x1ebe block/blk-mq.c:2915
__blk_flush_plug+0x270/0x422 block/blk-core.c:1213
blk_finish_plug block/blk-core.c:1240 [inline]
blk_finish_plug block/blk-core.c:1237 [inline]
__submit_bio+0x3ac/0x492 block/blk-core.c:637
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x740/0xe36 block/blk-core.c:739
submit_bio_noacct+0xa96/0x1e04 block/blk-core.c:868
submit_bio+0xc8/0x4f2 block/blk-core.c:910
submit_bh_wbc+0x42a/0x5a8 fs/buffer.c:2814
submit_bh fs/buffer.c:2819 [inline]
block_read_full_folio+0x6e6/0x90a fs/buffer.c:2446
blkdev_read_folio+0x26/0x30 block/fops.c:442
filemap_read_folio+0xc2/0x272 mm/filemap.c:2366
do_read_cache_folio+0x1e6/0x4d2 mm/filemap.c:3826
read_cache_folio+0x4e/0x68 mm/filemap.c:3858
read_mapping_folio include/linux/pagemap.h:1011 [inline]
read_part_sector+0xc0/0x44e block/partitions/core.c:722
read_lba+0x1c8/0x344 block/partitions/efi.c:248
find_valid_gpt.constprop.0+0x206/0x22f2 block/partitions/efi.c:603
efi_partition+0x10a/0xa14 block/partitions/efi.c:720
check_partition block/partitions/core.c:141 [inline]
blk_add_partitions block/partitions/core.c:589 [inline]
bdev_disk_changed+0x5de/0x139c block/partitions/core.c:693
blkdev_get_whole+0x17c/0x514 block/bdev.c:707
bdev_open+0x86a/0xfa8 block/bdev.c:916
blkdev_open+0x2e2/0x396 block/fops.c:627
do_dentry_open+0xe8e/0x1946 fs/open.c:945
vfs_open+0xbe/0x37c fs/open.c:1075
do_open fs/namei.c:3828 [inline]
path_openat+0x1b70/0x28c2 fs/namei.c:3987
do_filp_open+0x19c/0x35c fs/namei.c:4014
do_sys_openat2+0x174/0x1ca fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__riscv_sys_openat+0x178/0x1fe fs/open.c:1428
syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
_new_vmalloc_restore_context_a0+0xc2/0xce
-> #1 (&cmd->lock){+.+.}-{4:4}:
lock_acquire.part.0+0x2c4/0x81a kernel/locking/lockdep.c:5849
lock_acquire+0x74/0x98 kernel/locking/lockdep.c:5822
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x166/0x1082 kernel/locking/mutex.c:735
mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:787
nbd_queue_rq+0xbc/0xe6a drivers/block/nbd.c:1135
blk_mq_dispatch_rq_list+0x3f0/0x1ab6 block/blk-mq.c:2120
__blk_mq_do_dispatch_sched block/blk-mq-sched.c:170 [inline]
blk_mq_do_dispatch_sched block/blk-mq-sched.c:184 [inline]
__blk_mq_sched_dispatch_requests+0xaee/0x1370 block/blk-mq-sched.c:309
blk_mq_sched_dispatch_requests+0xb6/0x17c block/blk-mq-sched.c:331
blk_mq_run_hw_queue+0x28c/0x6ba block/blk-mq.c:2354
blk_mq_dispatch_plug_list block/blk-mq.c:2864 [inline]
blk_mq_flush_plug_list+0x63c/0x1ebe block/blk-mq.c:2915
__blk_flush_plug+0x270/0x422 block/blk-core.c:1213
blk_finish_plug block/blk-core.c:1240 [inline]
blk_finish_plug block/blk-core.c:1237 [inline]
__submit_bio+0x3ac/0x492 block/blk-core.c:637
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x740/0xe36 block/blk-core.c:739
submit_bio_noacct+0xa96/0x1e04 block/blk-core.c:868
submit_bio+0xc8/0x4f2 block/blk-core.c:910
submit_bh_wbc+0x42a/0x5a8 fs/buffer.c:2814
submit_bh fs/buffer.c:2819 [inline]
block_read_full_folio+0x6e6/0x90a fs/buffer.c:2446
blkdev_read_folio+0x26/0x30 block/fops.c:442
filemap_read_folio+0xc2/0x272 mm/filemap.c:2366
do_read_cache_folio+0x1e6/0x4d2 mm/filemap.c:3826
read_cache_folio+0x4e/0x68 mm/filemap.c:3858
read_mapping_folio include/linux/pagemap.h:1011 [inline]
read_part_sector+0xc0/0x44e block/partitions/core.c:722
read_lba+0x1c8/0x344 block/partitions/efi.c:248
find_valid_gpt.constprop.0+0x206/0x22f2 block/partitions/efi.c:603
efi_partition+0x10a/0xa14 block/partitions/efi.c:720
check_partition block/partitions/core.c:141 [inline]
blk_add_partitions block/partitions/core.c:589 [inline]
bdev_disk_changed+0x5de/0x139c block/partitions/core.c:693
blkdev_get_whole+0x17c/0x514 block/bdev.c:707
bdev_open+0x86a/0xfa8 block/bdev.c:916
blkdev_open+0x2e2/0x396 block/fops.c:627
do_dentry_open+0xe8e/0x1946 fs/open.c:945
vfs_open+0xbe/0x37c fs/open.c:1075
do_open fs/namei.c:3828 [inline]
path_openat+0x1b70/0x28c2 fs/namei.c:3987
do_filp_open+0x19c/0x35c fs/namei.c:4014
do_sys_openat2+0x174/0x1ca fs/open.c:1402
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__riscv_sys_openat+0x178/0x1fe fs/open.c:1428
syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
_new_vmalloc_restore_context_a0+0xc2/0xce
-> #0 (set->srcu){.+.+}-{0:0}:
check_noncircular+0x2ba/0x354 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain kernel/locking/lockdep.c:3904 [inline]
__lock_acquire+0x2e4e/0x8594 kernel/locking/lockdep.c:5226
lock_sync+0x286/0x504 kernel/locking/lockdep.c:5897
srcu_lock_sync include/linux/srcu.h:170 [inline]
__synchronize_srcu+0xd4/0x292 kernel/rcu/srcutree.c:1418
synchronize_srcu_expedited kernel/rcu/srcutree.c:1458 [inline]
synchronize_srcu+0x172/0x414 kernel/rcu/srcutree.c:1513
blk_mq_wait_quiesce_done block/blk-mq.c:291 [inline]
blk_mq_wait_quiesce_done block/blk-mq.c:288 [inline]
blk_mq_quiesce_queue block/blk-mq.c:311 [inline]
blk_mq_quiesce_queue+0x12e/0x19e block/blk-mq.c:306
elevator_disable+0x76/0x1e8 block/elevator.c:671
blk_mq_elv_switch_none block/blk-mq.c:4939 [inline]
__blk_mq_update_nr_hw_queues+0x390/0x1326 block/blk-mq.c:5003
blk_mq_update_nr_hw_queues+0x32/0x4a block/blk-mq.c:5063
nbd_start_device+0x140/0xc00 drivers/block/nbd.c:1413
nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline]
__nbd_ioctl drivers/block/nbd.c:1539 [inline]
nbd_ioctl+0x474/0xd90 drivers/block/nbd.c:1579
blkdev_ioctl+0x23c/0xca0 block/ioctl.c:693
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__riscv_sys_ioctl+0x18e/0x1e2 fs/ioctl.c:892
syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
_new_vmalloc_restore_context_a0+0xc2/0xce
other info that might help us debug this:
Chain exists of:
set->srcu --> &q->q_usage_counter(io)#22 --> &q->sysfs_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&q->sysfs_lock);
lock(&q->q_usage_counter(io)#22);
lock(&q->sysfs_lock);
sync(set->srcu);
*** DEADLOCK ***
5 locks held by syz.3.535/11549:
#0: ff60000019fa6198 (&nbd->config_lock){+.+.}-{4:4}, at: nbd_ioctl+0x144/0xd90 drivers/block/nbd.c:1572
#1: ff60000019fa60d8 (&set->tag_list_lock){+.+.}-{4:4}, at: blk_mq_update_nr_hw_queues+0x2a/0x4a block/blk-mq.c:5062
#2: ff60000019dfcea8 (&q->q_usage_counter(io)#22){++++}-{0:0}, at: blk_mq_freeze_queue block/blk-mq.c:213 [inline]
#2: ff60000019dfcea8 (&q->q_usage_counter(io)#22){++++}-{0:0}, at: __blk_mq_update_nr_hw_queues+0x206/0x1326 block/blk-mq.c:4996
#3: ff60000019dfcee0 (&q->q_usage_counter(queue)#6){+.+.}-{0:0}, at: blk_mq_freeze_queue block/blk-mq.c:213 [inline]
#3: ff60000019dfcee0 (&q->q_usage_counter(queue)#6){+.+.}-{0:0}, at: __blk_mq_update_nr_hw_queues+0x206/0x1326 block/blk-mq.c:4996
#4: ff60000019dfd3d0 (&q->sysfs_lock){+.+.}-{4:4}, at: blk_mq_elv_switch_none block/blk-mq.c:4925 [inline]
#4: ff60000019dfd3d0 (&q->sysfs_lock){+.+.}-{4:4}, at: __blk_mq_update_nr_hw_queues+0x41e/0x1326 block/blk-mq.c:5003
stack backtrace:
CPU: 0 UID: 0 PID: 11549 Comm: syz.3.535 Not tainted 6.13.0-rc2-syzkaller-g21f1b85c8912 #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80071bae>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff8000325c>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:136
[<ffffffff8005e1f4>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff8005e1f4>] dump_stack_lvl+0x12e/0x1a6 lib/dump_stack.c:120
[<ffffffff8005e288>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff802adb2a>] print_circular_bug+0x3a2/0x42c kernel/locking/lockdep.c:2074
[<ffffffff802ade6e>] check_noncircular+0x2ba/0x354 kernel/locking/lockdep.c:2206
[<ffffffff802b5b8a>] check_prev_add kernel/locking/lockdep.c:3161 [inline]
[<ffffffff802b5b8a>] check_prevs_add kernel/locking/lockdep.c:3280 [inline]
[<ffffffff802b5b8a>] validate_chain kernel/locking/lockdep.c:3904 [inline]
[<ffffffff802b5b8a>] __lock_acquire+0x2e4e/0x8594 kernel/locking/lockdep.c:5226
[<ffffffff802bd132>] lock_sync+0x286/0x504 kernel/locking/lockdep.c:5897
[<ffffffff80332756>] srcu_lock_sync include/linux/srcu.h:170 [inline]
[<ffffffff80332756>] __synchronize_srcu+0xd4/0x292 kernel/rcu/srcutree.c:1418
[<ffffffff80333138>] synchronize_srcu_expedited kernel/rcu/srcutree.c:1458 [inline]
[<ffffffff80333138>] synchronize_srcu+0x172/0x414 kernel/rcu/srcutree.c:1513
[<ffffffff8142efa4>] blk_mq_wait_quiesce_done block/blk-mq.c:291 [inline]
[<ffffffff8142efa4>] blk_mq_wait_quiesce_done block/blk-mq.c:288 [inline]
[<ffffffff8142efa4>] blk_mq_quiesce_queue block/blk-mq.c:311 [inline]
[<ffffffff8142efa4>] blk_mq_quiesce_queue+0x12e/0x19e block/blk-mq.c:306
[<ffffffff813f6796>] elevator_disable+0x76/0x1e8 block/elevator.c:671
[<ffffffff8144d39a>] blk_mq_elv_switch_none block/blk-mq.c:4939 [inline]
[<ffffffff8144d39a>] __blk_mq_update_nr_hw_queues+0x390/0x1326 block/blk-mq.c:5003
[<ffffffff8144e362>] blk_mq_update_nr_hw_queues+0x32/0x4a block/blk-mq.c:5063
[<ffffffff82a4e898>] nbd_start_device+0x140/0xc00 drivers/block/nbd.c:1413
[<ffffffff82a4f7cc>] nbd_start_device_ioctl drivers/block/nbd.c:1464 [inline]
[<ffffffff82a4f7cc>] __nbd_ioctl drivers/block/nbd.c:1539 [inline]
[<ffffffff82a4f7cc>] nbd_ioctl+0x474/0xd90 drivers/block/nbd.c:1579
[<ffffffff8145f920>] blkdev_ioctl+0x23c/0xca0 block/ioctl.c:693
[<ffffffff80b21058>] vfs_ioctl fs/ioctl.c:51 [inline]
[<ffffffff80b21058>] __do_sys_ioctl fs/ioctl.c:906 [inline]
[<ffffffff80b21058>] __se_sys_ioctl fs/ioctl.c:892 [inline]
[<ffffffff80b21058>] __riscv_sys_ioctl+0x18e/0x1e2 fs/ioctl.c:892
[<ffffffff80070302>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
[<ffffffff861c1fae>] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
[<ffffffff861e652a>] _new_vmalloc_restore_context_a0+0xc2/0xce
block nbd3: shutting down sockets