ldm_validate_partition_table(): Disk read failed.
Dev nbd0: unable to read RDB block 0
 nbd0: unable to read partition table
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
udevd/4694 is trying to acquire lock:
ffff0000c81009a8 (&q->q_usage_counter(io)#33){++++}-{0:0}, at: __submit_bio+0x19c/0x478 block/blk-core.c:635

but task is already holding lock:
ffff0000c14a3790 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
ffff0000c14a3790 (mapping.invalidate_lock){++++}-{4:4}, at: do_page_cache_ra+0xec/0x11c mm/readahead.c:333

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #7 (mapping.invalidate_lock){++++}-{4:4}:
       down_read+0x58/0x2bc kernel/locking/rwsem.c:1568
       filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
       filemap_fault+0x46c/0x1420 mm/filemap.c:3543
       __do_fault+0xf4/0x4a0 mm/memory.c:5458
       do_shared_fault mm/memory.c:5957 [inline]
       do_fault mm/memory.c:6031 [inline]
       do_pte_missing+0x4f0/0x28a4 mm/memory.c:4550
       handle_pte_fault mm/memory.c:6411 [inline]
       __handle_mm_fault mm/memory.c:6549 [inline]
       handle_mm_fault+0x1564/0x245c mm/memory.c:6718
       faultin_page mm/gup.c:1126 [inline]
       __get_user_pages+0x678/0x20f0 mm/gup.c:1428
       __get_user_pages_locked mm/gup.c:1692 [inline]
       faultin_page_range+0x1e8/0x6d4 mm/gup.c:1912
       madvise_populate mm/madvise.c:969 [inline]
       madvise_do_behavior+0x55c/0x7c4 mm/madvise.c:1927
       do_madvise+0x1ac/0x278 mm/madvise.c:2022
       __do_sys_madvise mm/madvise.c:2031 [inline]
       __se_sys_madvise mm/madvise.c:2029 [inline]
       __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:2029
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
       el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
       el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

-> #6 (&mm->mmap_lock){++++}-{4:4}:
       __might_fault+0xc0/0x114 mm/memory.c:7324
       _inline_copy_from_user+0x38/0x204 include/linux/uaccess.h:169
       copy_from_user include/linux/uaccess.h:221 [inline]
       csum_and_copy_from_user include/net/checksum.h:31 [inline]
       copy_from_user_iter_csum net/core/skbuff.c:7402 [inline]
       iterate_ubuf include/linux/iov_iter.h:30 [inline]
       iterate_and_advance2 include/linux/iov_iter.h:302 [inline]
       csum_and_copy_from_iter_full+0x190/0x1590 net/core/skbuff.c:7414
       ip_generic_getfrag+0x128/0x278 net/ipv4/ip_output.c:942
       raw6_getfrag+0x234/0x338 net/ipv6/raw.c:739
       __ip6_append_data+0x2b44/0x37d0 net/ipv6/ip6_output.c:1736
       ip6_append_data+0x100/0x27c net/ipv6/ip6_output.c:1891
       rawv6_sendmsg+0xe78/0x1454 net/ipv6/raw.c:913
       inet_sendmsg+0xb4/0xd8 net/ipv4/af_inet.c:866
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg+0xc8/0x138 net/socket.c:802
       ____sys_sendmsg+0x418/0x70c net/socket.c:2698
       ___sys_sendmsg+0x198/0x224 net/socket.c:2752
       __sys_sendmsg+0x160/0x214 net/socket.c:2784
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2787
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
       el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
       el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

-> #5 (sk_lock-AF_INET6){+.+.}-{0:0}:
       lock_sock_nested+0x58/0x110 net/core/sock.c:3783
       lock_sock include/net/sock.h:1713 [inline]
       inet_shutdown+0x74/0x34c net/ipv4/af_inet.c:915
       kernel_sock_shutdown+0x6c/0x80 net/socket.c:3785
       nbd_mark_nsock_dead+0x27c/0x4f4 drivers/block/nbd.c:318
       sock_shutdown+0x154/0x23c drivers/block/nbd.c:411
       nbd_clear_sock drivers/block/nbd.c:1427 [inline]
       nbd_config_put+0x274/0x52c drivers/block/nbd.c:1451
       nbd_genl_connect+0x1234/0x1564 drivers/block/nbd.c:2248
       genl_family_rcv_msg_doit+0x1e4/0x2d8 net/netlink/genetlink.c:1114
       genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
       genl_rcv_msg+0x444/0x620 net/netlink/genetlink.c:1209
       netlink_rcv_skb+0x22c/0x410 net/netlink/af_netlink.c:2550
       genl_rcv+0x38/0x50 net/netlink/genetlink.c:1218
       netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
       netlink_unicast+0x610/0x800 net/netlink/af_netlink.c:1344
       netlink_sendmsg+0x63c/0x920 net/netlink/af_netlink.c:1894
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg+0xc8/0x138 net/socket.c:802
       ____sys_sendmsg+0x418/0x70c net/socket.c:2698
       ___sys_sendmsg+0x198/0x224 net/socket.c:2752
       __sys_sendmsg+0x160/0x214 net/socket.c:2784
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2787
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
       el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
       el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

-> #4 (&nsock->tx_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x160/0xef8 kernel/locking/mutex.c:820
       mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873
       nbd_handle_cmd drivers/block/nbd.c:1143 [inline]
       nbd_queue_rq+0x208/0xc44 drivers/block/nbd.c:1207
       blk_mq_dispatch_rq_list+0x3bc/0x13a4 block/blk-mq.c:2148
       __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
       blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
       __blk_mq_sched_dispatch_requests+0xa40/0x10bc block/blk-mq-sched.c:307
       blk_mq_sched_dispatch_requests+0xa4/0x154 block/blk-mq-sched.c:329
       blk_mq_run_hw_queue+0x300/0x4dc block/blk-mq.c:2386
       blk_mq_dispatch_list+0xa2c/0xb2c block/blk-mq.c:-1
       blk_mq_flush_plug_list+0x3a4/0x484 block/blk-mq.c:2997
       __blk_flush_plug+0x338/0x410 block/blk-core.c:1230
       blk_finish_plug block/blk-core.c:1257 [inline]
       __submit_bio+0x39c/0x478 block/blk-core.c:649
       __submit_bio_noacct_mq block/blk-core.c:722 [inline]
       submit_bio_noacct_nocheck+0x284/0xa98 block/blk-core.c:753
       submit_bio_noacct+0xd90/0x1814 block/blk-core.c:884
       submit_bio+0x38c/0x528 block/blk-core.c:926
       blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]
       submit_bh_wbc+0x4b0/0x594 fs/buffer.c:2737
       submit_bh fs/buffer.c:2742 [inline]
       block_read_full_folio+0x468/0x734 fs/buffer.c:2344
       blkdev_read_folio+0x28/0x38 block/fops.c:494
       filemap_read_folio+0xf0/0x2fc mm/filemap.c:2502
       do_read_cache_folio+0x368/0x5b8 mm/filemap.c:4107
       read_cache_folio+0x68/0x84 mm/filemap.c:4139
       read_mapping_folio include/linux/pagemap.h:1017 [inline]
       read_part_sector+0xcc/0x708 block/partitions/core.c:724
       adfspart_check_ICS+0xa4/0x6fc block/partitions/acorn.c:356
       check_partition block/partitions/core.c:143 [inline]
       blk_add_partitions block/partitions/core.c:591 [inline]
       bdev_disk_changed+0x6fc/0x11c8 block/partitions/core.c:695
       blkdev_get_whole+0x15c/0x240 block/bdev.c:756
       bdev_open+0x2d8/0x8cc block/bdev.c:965
       blkdev_open+0x2d8/0x404 block/fops.c:697
       do_dentry_open+0x5c4/0xfc8 fs/open.c:947
       vfs_open+0x44/0x2d4 fs/open.c:1079
       do_open fs/namei.c:4699 [inline]
       path_openat+0x2234/0x2a6c fs/namei.c:4858
       do_file_open+0x1c4/0x2e4 fs/namei.c:4887
       do_sys_openat2+0x114/0x1e8 fs/open.c:1364
       do_sys_open+0xac/0xdc fs/open.c:1370
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __arm64_sys_openat+0x9c/0xb8 fs/open.c:1381
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
       el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
       el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

-> #3 (&cmd->lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x160/0xef8 kernel/locking/mutex.c:820
       mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873
       nbd_queue_rq+0xb0/0xc44 drivers/block/nbd.c:1199
       blk_mq_dispatch_rq_list+0x3bc/0x13a4 block/blk-mq.c:2148
       __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
       blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
       __blk_mq_sched_dispatch_requests+0xa40/0x10bc block/blk-mq-sched.c:307
       blk_mq_sched_dispatch_requests+0xa4/0x154 block/blk-mq-sched.c:329
       blk_mq_run_hw_queue+0x300/0x4dc block/blk-mq.c:2386
       blk_mq_dispatch_list+0xa2c/0xb2c block/blk-mq.c:-1
       blk_mq_flush_plug_list+0x3a4/0x484 block/blk-mq.c:2997
       __blk_flush_plug+0x338/0x410 block/blk-core.c:1230
       blk_finish_plug block/blk-core.c:1257 [inline]
       __submit_bio+0x39c/0x478 block/blk-core.c:649
       __submit_bio_noacct_mq block/blk-core.c:722 [inline]
       submit_bio_noacct_nocheck+0x284/0xa98 block/blk-core.c:753
       submit_bio_noacct+0xd90/0x1814 block/blk-core.c:884
       submit_bio+0x38c/0x528 block/blk-core.c:926
       blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline]
       submit_bh_wbc+0x4b0/0x594 fs/buffer.c:2737
       submit_bh fs/buffer.c:2742 [inline]
       block_read_full_folio+0x468/0x734 fs/buffer.c:2344
       blkdev_read_folio+0x28/0x38 block/fops.c:494
       filemap_read_folio+0xf0/0x2fc mm/filemap.c:2502
       do_read_cache_folio+0x368/0x5b8 mm/filemap.c:4107
       read_cache_folio+0x68/0x84 mm/filemap.c:4139
       read_mapping_folio include/linux/pagemap.h:1017 [inline]
       read_part_sector+0xcc/0x708 block/partitions/core.c:724
       adfspart_check_ICS+0xa4/0x6fc block/partitions/acorn.c:356
       check_partition block/partitions/core.c:143 [inline]
       blk_add_partitions block/partitions/core.c:591 [inline]
       bdev_disk_changed+0x6fc/0x11c8 block/partitions/core.c:695
       blkdev_get_whole+0x15c/0x240 block/bdev.c:756
       bdev_open+0x2d8/0x8cc block/bdev.c:965
       blkdev_open+0x2d8/0x404 block/fops.c:697
       do_dentry_open+0x5c4/0xfc8 fs/open.c:947
       vfs_open+0x44/0x2d4 fs/open.c:1079
       do_open fs/namei.c:4699 [inline]
       path_openat+0x2234/0x2a6c fs/namei.c:4858
       do_file_open+0x1c4/0x2e4 fs/namei.c:4887
       do_sys_openat2+0x114/0x1e8 fs/open.c:1364
       do_sys_open+0xac/0xdc fs/open.c:1370
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __arm64_sys_openat+0x9c/0xb8 fs/open.c:1381
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
       el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
       el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

-> #2 (set->srcu){.+.+}-{0:0}:
       srcu_lock_sync include/linux/srcu.h:199 [inline]
       __synchronize_srcu+0xc8/0x268 kernel/rcu/srcutree.c:1481
       synchronize_srcu+0x41c/0x604 kernel/rcu/srcutree.c:-1
       blk_mq_wait_quiesce_done+0x88/0xb0 block/blk-mq.c:284
       blk_mq_quiesce_queue+0x70/0x8c block/blk-mq.c:304
       elevator_switch+0x128/0x384 block/elevator.c:576
       elevator_change+0x200/0x358 block/elevator.c:681
       elevator_set_default+0x190/0x2b0 block/elevator.c:754
       blk_register_queue+0x2f8/0x3d0 block/blk-sysfs.c:987
       __add_disk+0x568/0xb3c block/genhd.c:528
       add_disk_fwnode+0xe8/0x42c block/genhd.c:597
       device_add_disk+0x38/0x4c block/genhd.c:627
       add_disk include/linux/blkdev.h:794 [inline]
       nbd_dev_add+0x588/0x85c drivers/block/nbd.c:1984
       nbd_init+0x15c/0x174 drivers/block/nbd.c:2692
       do_one_initcall+0x274/0xc20 init/main.c:1392
       do_initcall_level+0x128/0x1c4 init/main.c:1454
       do_initcalls+0x70/0xd0 init/main.c:1470
       do_basic_setup+0x7c/0x90 init/main.c:1490
       kernel_init_freeable+0x268/0x3a8 init/main.c:1703
       kernel_init+0x24/0x1dc init/main.c:1593
       ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842

-> #1 (&q->elevator_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x160/0xef8 kernel/locking/mutex.c:820
       mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873
       elevator_change+0x184/0x358 block/elevator.c:679
       elevator_set_none+0xa8/0x13c block/elevator.c:769
       blk_mq_elv_switch_none block/blk-mq.c:5150 [inline]
       __blk_mq_update_nr_hw_queues block/blk-mq.c:5195 [inline]
       blk_mq_update_nr_hw_queues+0x4ec/0x11fc block/blk-mq.c:5260
       nbd_start_device+0x15c/0xa38 drivers/block/nbd.c:1489
       nbd_genl_connect+0xfac/0x1564 drivers/block/nbd.c:2239
       genl_family_rcv_msg_doit+0x1e4/0x2d8 net/netlink/genetlink.c:1114
       genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
       genl_rcv_msg+0x444/0x620 net/netlink/genetlink.c:1209
       netlink_rcv_skb+0x22c/0x410 net/netlink/af_netlink.c:2550
       genl_rcv+0x38/0x50 net/netlink/genetlink.c:1218
       netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
       netlink_unicast+0x610/0x800 net/netlink/af_netlink.c:1344
       netlink_sendmsg+0x63c/0x920 net/netlink/af_netlink.c:1894
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg+0xc8/0x138 net/socket.c:802
       ____sys_sendmsg+0x418/0x70c net/socket.c:2698
       ___sys_sendmsg+0x198/0x224 net/socket.c:2752
       __sys_sendmsg+0x160/0x214 net/socket.c:2784
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2787
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
       el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
       el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

-> #0 (&q->q_usage_counter(io)#33){++++}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x1780/0x2f44 kernel/locking/lockdep.c:5237
       lock_acquire+0x140/0x368 kernel/locking/lockdep.c:5868
       bio_queue_enter block/blk.h:89 [inline]
       blk_mq_submit_bio+0x678/0x23b8 block/blk-mq.c:3175
       __submit_bio+0x19c/0x478 block/blk-core.c:635
       __submit_bio_noacct_mq block/blk-core.c:722 [inline]
       submit_bio_noacct_nocheck+0x284/0xa98 block/blk-core.c:753
       submit_bio_noacct+0xd90/0x1814 block/blk-core.c:884
       submit_bio+0x38c/0x528 block/blk-core.c:926
       mpage_bio_submit_read fs/mpage.c:74 [inline]
       mpage_readahead+0x534/0x67c fs/mpage.c:379
       blkdev_readahead+0x28/0x38 block/fops.c:499
       read_pages+0x14c/0x4c4 mm/readahead.c:163
       page_cache_ra_unbounded+0x6d8/0xb68 mm/readahead.c:304
       do_page_cache_ra+0xfc/0x11c mm/readahead.c:334
       force_page_cache_ra+0x14c/0x1a4 mm/readahead.c:364
       page_cache_sync_ra+0x210/0xb10 mm/readahead.c:582
       filemap_get_pages+0x34c/0x1c24 mm/filemap.c:2696
       filemap_read+0x350/0xcac mm/filemap.c:2806
       blkdev_read_iter+0x2b0/0x3dc block/fops.c:855
       new_sync_read fs/read_write.c:493 [inline]
       vfs_read+0x4ac/0x8e4 fs/read_write.c:574
       ksys_read+0x12c/0x224 fs/read_write.c:717
       __do_sys_read fs/read_write.c:726 [inline]
       __se_sys_read fs/read_write.c:724 [inline]
       __arm64_sys_read+0x7c/0x90 fs/read_write.c:724
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
       el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
       el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

other info that might help us debug this:

Chain exists of:
  &q->q_usage_counter(io)#33 --> &mm->mmap_lock --> mapping.invalidate_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(mapping.invalidate_lock);
                               lock(&mm->mmap_lock);
                               lock(mapping.invalidate_lock);
  rlock(&q->q_usage_counter(io)#33);

 *** DEADLOCK ***

2 locks held by udevd/4694:
 #0: ffff0000c14a35f8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1044 [inline]
 #0: ffff0000c14a35f8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_read_iter+0x2a0/0x3dc block/fops.c:854
 #1: ffff0000c14a3790 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
 #1: ffff0000c14a3790 (mapping.invalidate_lock){++++}-{4:4}, at: do_page_cache_ra+0xec/0x11c mm/readahead.c:333

stack backtrace:
CPU: 0 UID: 0 PID: 4694 Comm: udevd Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x328/0x330 kernel/locking/lockdep.c:2043
 check_noncircular+0x158/0x174 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x1780/0x2f44 kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x368 kernel/locking/lockdep.c:5868
 bio_queue_enter block/blk.h:89 [inline]
 blk_mq_submit_bio+0x678/0x23b8 block/blk-mq.c:3175
 __submit_bio+0x19c/0x478 block/blk-core.c:635
 __submit_bio_noacct_mq block/blk-core.c:722 [inline]
 submit_bio_noacct_nocheck+0x284/0xa98 block/blk-core.c:753
 submit_bio_noacct+0xd90/0x1814 block/blk-core.c:884
 submit_bio+0x38c/0x528 block/blk-core.c:926
 mpage_bio_submit_read fs/mpage.c:74 [inline]
 mpage_readahead+0x534/0x67c fs/mpage.c:379
 blkdev_readahead+0x28/0x38 block/fops.c:499
 read_pages+0x14c/0x4c4 mm/readahead.c:163
 page_cache_ra_unbounded+0x6d8/0xb68 mm/readahead.c:304
 do_page_cache_ra+0xfc/0x11c mm/readahead.c:334
 force_page_cache_ra+0x14c/0x1a4 mm/readahead.c:364
 page_cache_sync_ra+0x210/0xb10 mm/readahead.c:582
 filemap_get_pages+0x34c/0x1c24 mm/filemap.c:2696
 filemap_read+0x350/0xcac mm/filemap.c:2806
 blkdev_read_iter+0x2b0/0x3dc block/fops.c:855
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x4ac/0x8e4 fs/read_write.c:574
 ksys_read+0x12c/0x224 fs/read_write.c:717
 __do_sys_read fs/read_write.c:726 [inline]
 __se_sys_read fs/read_write.c:724 [inline]
 __arm64_sys_read+0x7c/0x90 fs/read_write.c:724
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594