syzbot

(syz.7.7290,26915,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x93f628a2, computed 0x2aee8be5. Applying ECC.
(syz.7.7290,26915,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.7.7290/26915 is trying to acquire lock:
ffffffff8ea85420 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:317 [inline]
ffffffff8ea85420 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:4520 [inline]
ffffffff8ea85420 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:4875 [inline]
ffffffff8ea85420 (fs_reclaim){+.+.}-{0:0}, at: __do_kmalloc_node mm/slub.c:5294 [inline]
ffffffff8ea85420 (fs_reclaim){+.+.}-{0:0}, at: __kmalloc_noprof+0x9d/0x760 mm/slub.c:5307

but task is already holding lock:
ffff88806e6089a0 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
ffff88806e6089a0 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1f9/0x3e0 fs/ocfs2/quota_global.c:313

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #11 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200 kernel/locking/rwsem.c:1625
       inode_lock include/linux/fs.h:1029 [inline]
       ocfs2_lock_global_qf+0x1f9/0x3e0 fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x2a0/0xb40 fs/ocfs2/quota_global.c:842
       dqget+0x73c/0xc50 fs/quota/dquot.c:1002
       __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1530
       ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206
       ocfs2_mknod+0xa67/0x2260 fs/ocfs2/namei.c:314
       ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:677
       lookup_open fs/namei.c:4511 [inline]
       open_last_lookups fs/namei.c:4611 [inline]
       path_openat+0x1395/0x3860 fs/namei.c:4855
       do_file_open+0x23e/0x4a0 fs/namei.c:4887
       do_sys_openat2+0x113/0x200 fs/open.c:1364
       do_sys_open fs/open.c:1370 [inline]
       __do_sys_open fs/open.c:1378 [inline]
       __se_sys_open fs/open.c:1374 [inline]
       __x64_sys_open+0x11e/0x150 fs/open.c:1374
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #10 (&dquot->dq_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a3/0x1550 kernel/locking/mutex.c:820
       wait_on_dquot fs/quota/dquot.c:357 [inline]
       dqget+0x6b9/0xc50 fs/quota/dquot.c:997
       dquot_transfer+0x451/0x660 fs/quota/dquot.c:2179
       ext4_setattr+0x894/0x1d60 fs/ext4/inode.c:5935
       notify_change+0xc1a/0xf40 fs/attr.c:556
       chown_common+0x466/0x6b0 fs/open.c:776
       do_fchownat+0x14c/0x250 fs/open.c:804
       __do_sys_lchown fs/open.c:829 [inline]
       __se_sys_lchown fs/open.c:827 [inline]
       __x64_sys_lchown+0x85/0xa0 fs/open.c:827
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #9 (&ei->xattr_sem){++++}-{4:4}:
       down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568
       ext4_readpage_inline+0x36/0x6a0 fs/ext4/inline.c:549
       ext4_read_folio+0x15e/0x520 fs/ext4/readpage.c:403
       filemap_read_folio+0x137/0x3b0 mm/filemap.c:2502
       filemap_create_folio mm/filemap.c:2640 [inline]
       filemap_get_pages+0xcbb/0x1ef0 mm/filemap.c:2702
       filemap_read+0x447/0x1230 mm/filemap.c:2806
       __kernel_read+0x504/0x9b0 fs/read_write.c:532
       integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28
       ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:222 [inline]
       ima_calc_file_hash+0x446/0x860 security/integrity/ima/ima_crypto.c:280
       ima_collect_measurement+0x51d/0x9c0 security/integrity/ima/ima_api.c:300
       process_measurement+0x12cd/0x1c80 security/integrity/ima/ima_main.c:425
       ima_file_check+0xe1/0x130 security/integrity/ima/ima_main.c:685
       security_file_post_open+0xb3/0x260 security/security.c:2755
       do_open fs/namei.c:4701 [inline]
       path_openat+0x2e4d/0x3860 fs/namei.c:4858
       do_file_open+0x23e/0x4a0 fs/namei.c:4887
       do_sys_openat2+0x113/0x200 fs/open.c:1364
       do_sys_open fs/open.c:1370 [inline]
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1381
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #8 (mapping.invalidate_lock#2){++++}-{4:4}:
       down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568
       filemap_invalidate_lock_shared include/linux/fs.h:1094 [inline]
       do_page_cache_ra mm/readahead.c:333 [inline]
       page_cache_ra_order+0xad4/0xe80 mm/readahead.c:538
       do_async_mmap_readahead mm/filemap.c:3442 [inline]
       filemap_fault+0x5bf/0x1300 mm/filemap.c:3541
       __do_fault+0x138/0x2a0 mm/memory.c:5458
       do_read_fault mm/memory.c:5893 [inline]
       do_fault mm/memory.c:6027 [inline]
       do_pte_missing+0x2093/0x33f0 mm/memory.c:4550
       handle_pte_fault mm/memory.c:6411 [inline]
       __handle_mm_fault mm/memory.c:6549 [inline]
       handle_mm_fault+0x1bd9/0x3170 mm/memory.c:6718
       faultin_page mm/gup.c:1126 [inline]
       __get_user_pages+0x1683/0x2720 mm/gup.c:1428
       __get_user_pages_locked mm/gup.c:1692 [inline]
       get_dump_page+0x1b5/0x410 mm/gup.c:2192
       dump_user_range+0x20a/0x12c0 fs/coredump.c:1372
       elf_core_dump+0x34c2/0x3ad0 fs/binfmt_elf.c:2109
       coredump_write+0x1216/0x1910 fs/coredump.c:1053
       do_coredump fs/coredump.c:1132 [inline]
       vfs_coredump+0x3807/0x4530 fs/coredump.c:1206
       get_signal+0x1107/0x1330 kernel/signal.c:3022
       arch_do_signal_or_restart+0xbc/0x840 arch/x86/kernel/signal.c:337
       __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
       exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
       __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
       irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
       irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
       irqentry_exit+0x289/0x760 kernel/entry/common.c:162
       asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618

-> #7 (&mm->mmap_lock){++++}-{4:4}:
       __might_fault+0xcb/0x130 mm/memory.c:7324
       _inline_copy_from_user include/linux/uaccess.h:169 [inline]
       _copy_from_user+0x28/0xb0 lib/usercopy.c:18
       copy_from_user include/linux/uaccess.h:223 [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+0x1e7/0x1f00 net/core/skbuff.c:7414
       ip_generic_getfrag+0x149/0x2d0 net/ipv4/ip_output.c:942
       __ip6_append_data+0x39cd/0x3f60 net/ipv6/ip6_output.c:1736
       ip6_append_data+0x10f/0x280 net/ipv6/ip6_output.c:1891
       rawv6_sendmsg+0x12d3/0x18e0 net/ipv6/raw.c:913
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg net/socket.c:802 [inline]
       ____sys_sendmsg+0x80a/0x9f0 net/socket.c:2698
       ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
       __sys_sendmsg net/socket.c:2784 [inline]
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #6 (sk_lock-AF_INET6){+.+.}-{0:0}:
       lock_sock_nested+0x41/0x100 net/core/sock.c:3783
       lock_sock include/net/sock.h:1713 [inline]
       inet_shutdown+0x6a/0x390 net/ipv4/af_inet.c:915
       nbd_mark_nsock_dead+0x2e9/0x560 drivers/block/nbd.c:318
       sock_shutdown+0x15e/0x260 drivers/block/nbd.c:411
       nbd_clear_sock+0x24/0x170 drivers/block/nbd.c:1427
       nbd_config_put+0x2dd/0x580 drivers/block/nbd.c:1451
       nbd_genl_connect+0x19d5/0x1cf0 drivers/block/nbd.c:2248
       genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
       genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
       genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
       netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
       genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
       netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
       netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
       netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg net/socket.c:802 [inline]
       ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
       ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
       __sys_sendmsg net/socket.c:2784 [inline]
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #5 (&nsock->tx_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a3/0x1550 kernel/locking/mutex.c:820
       nbd_handle_cmd drivers/block/nbd.c:1143 [inline]
       nbd_queue_rq+0x37b/0x1100 drivers/block/nbd.c:1207
       blk_mq_dispatch_rq_list+0xa70/0x1910 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+0xdcc/0x1600 block/blk-mq-sched.c:307
       blk_mq_sched_dispatch_requests+0xd7/0x190 block/blk-mq-sched.c:329
       blk_mq_run_hw_queue+0x348/0x4f0 block/blk-mq.c:2386
       blk_mq_dispatch_list+0xd16/0xe10 include/linux/spinlock.h:-1
       blk_mq_flush_plug_list+0x48d/0x570 block/blk-mq.c:2997
       __blk_flush_plug+0x3ed/0x4d0 block/blk-core.c:1230
       blk_finish_plug block/blk-core.c:1257 [inline]
       __submit_bio+0x28d/0x580 block/blk-core.c:649
       __submit_bio_noacct_mq block/blk-core.c:722 [inline]
       submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:753
       submit_bh fs/buffer.c:2742 [inline]
       block_read_full_folio+0x7b7/0x830 fs/buffer.c:2358
       filemap_read_folio+0x137/0x3b0 mm/filemap.c:2502
       do_read_cache_folio+0x358/0x590 mm/filemap.c:4107
       read_mapping_folio include/linux/pagemap.h:1017 [inline]
       read_part_sector+0xb6/0x2b0 block/partitions/core.c:724
       adfspart_check_ICS+0xb1/0x960 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+0x817/0x1770 block/partitions/core.c:695
       blkdev_get_whole+0x380/0x510 block/bdev.c:756
       bdev_open+0x31e/0xd30 block/bdev.c:965
       blkdev_open+0x470/0x610 block/fops.c:697
       do_dentry_open+0x785/0x14e0 fs/open.c:947
       vfs_open+0x3b/0x340 fs/open.c:1079
       do_open fs/namei.c:4699 [inline]
       path_openat+0x2e08/0x3860 fs/namei.c:4858
       do_file_open+0x23e/0x4a0 fs/namei.c:4887
       do_sys_openat2+0x113/0x200 fs/open.c:1364
       do_sys_open fs/open.c:1370 [inline]
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1381
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (&cmd->lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a3/0x1550 kernel/locking/mutex.c:820
       nbd_queue_rq+0xc6/0x1100 drivers/block/nbd.c:1199
       blk_mq_dispatch_rq_list+0xa70/0x1910 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+0xdcc/0x1600 block/blk-mq-sched.c:307
       blk_mq_sched_dispatch_requests+0xd7/0x190 block/blk-mq-sched.c:329
       blk_mq_run_hw_queue+0x348/0x4f0 block/blk-mq.c:2386
       blk_mq_dispatch_list+0xd16/0xe10 include/linux/spinlock.h:-1
       blk_mq_flush_plug_list+0x48d/0x570 block/blk-mq.c:2997
       __blk_flush_plug+0x3ed/0x4d0 block/blk-core.c:1230
       blk_finish_plug block/blk-core.c:1257 [inline]
       __submit_bio+0x28d/0x580 block/blk-core.c:649
       __submit_bio_noacct_mq block/blk-core.c:722 [inline]
       submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:753
       submit_bh fs/buffer.c:2742 [inline]
       block_read_full_folio+0x7b7/0x830 fs/buffer.c:2358
       filemap_read_folio+0x137/0x3b0 mm/filemap.c:2502
       do_read_cache_folio+0x358/0x590 mm/filemap.c:4107
       read_mapping_folio include/linux/pagemap.h:1017 [inline]
       read_part_sector+0xb6/0x2b0 block/partitions/core.c:724
       adfspart_check_ICS+0xb1/0x960 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+0x817/0x1770 block/partitions/core.c:695
       blkdev_get_whole+0x380/0x510 block/bdev.c:756
       bdev_open+0x31e/0xd30 block/bdev.c:965
       blkdev_open+0x470/0x610 block/fops.c:697
       do_dentry_open+0x785/0x14e0 fs/open.c:947
       vfs_open+0x3b/0x340 fs/open.c:1079
       do_open fs/namei.c:4699 [inline]
       path_openat+0x2e08/0x3860 fs/namei.c:4858
       do_file_open+0x23e/0x4a0 fs/namei.c:4887
       do_sys_openat2+0x113/0x200 fs/open.c:1364
       do_sys_open fs/open.c:1370 [inline]
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1381
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (set->srcu){.+.+}-{0:0}:
       srcu_lock_sync include/linux/srcu.h:199 [inline]
       __synchronize_srcu+0xca/0x300 kernel/rcu/srcutree.c:1481
       elevator_switch+0x1e8/0x7a0 block/elevator.c:576
       elevator_change+0x2cc/0x450 block/elevator.c:681
       elevator_set_default+0x36c/0x430 block/elevator.c:754
       blk_register_queue+0x3e9/0x4e0 block/blk-sysfs.c:987
       __add_disk+0x677/0xd50 block/genhd.c:528
       add_disk_fwnode+0xfb/0x480 block/genhd.c:597
       add_disk include/linux/blkdev.h:794 [inline]
       nbd_dev_add+0x72c/0xb50 drivers/block/nbd.c:1984
       nbd_init+0x168/0x1f0 drivers/block/nbd.c:2692
       do_one_initcall+0x250/0x870 init/main.c:1392
       do_initcall_level+0x104/0x190 init/main.c:1454
       do_initcalls+0x59/0xa0 init/main.c:1470
       kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
       kernel_init+0x1d/0x1d0 init/main.c:1593
       ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

-> #2 (&q->elevator_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a3/0x1550 kernel/locking/mutex.c:820
       elevator_change+0x1b3/0x450 block/elevator.c:679
       elevator_set_none+0xb5/0x140 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+0x5e7/0x1a60 block/blk-mq.c:5260
       nbd_start_device+0x17f/0xb10 drivers/block/nbd.c:1489
       nbd_genl_connect+0x165b/0x1cf0 drivers/block/nbd.c:2239
       genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
       genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
       genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
       netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
       genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
       netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
       netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
       netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg net/socket.c:802 [inline]
       ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
       ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
       __sys_sendmsg net/socket.c:2784 [inline]
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&q->q_usage_counter(io)#50){++++}-{0:0}:
       blk_alloc_queue+0x546/0x680 block/blk-core.c:461
       blk_mq_alloc_queue block/blk-mq.c:4469 [inline]
       __blk_mq_alloc_disk+0x197/0x390 block/blk-mq.c:4516
       nbd_dev_add+0x499/0xb50 drivers/block/nbd.c:1954
       nbd_init+0x168/0x1f0 drivers/block/nbd.c:2692
       do_one_initcall+0x250/0x870 init/main.c:1392
       do_initcall_level+0x104/0x190 init/main.c:1454
       do_initcalls+0x59/0xa0 init/main.c:1470
       kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
       kernel_init+0x1d/0x1d0 init/main.c:1593
       ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

-> #0 (fs_reclaim){+.+.}-{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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
       lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
       __fs_reclaim_acquire mm/page_alloc.c:4325 [inline]
       fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4339
       might_alloc include/linux/sched/mm.h:317 [inline]
       slab_pre_alloc_hook mm/slub.c:4520 [inline]
       slab_alloc_node mm/slub.c:4875 [inline]
       __do_kmalloc_node mm/slub.c:5294 [inline]
       __kmalloc_noprof+0x9d/0x760 mm/slub.c:5307
       kmalloc_noprof include/linux/slab.h:954 [inline]
       find_tree_dqentry+0x5c/0x1070 fs/quota/quota_tree.c:663
       find_dqentry fs/quota/quota_tree.c:716 [inline]
       qtree_read_dquot+0x586/0x830 fs/quota/quota_tree.c:736
       ocfs2_acquire_dquot+0x2e9/0xb40 fs/ocfs2/quota_global.c:852
       dqget+0x73c/0xc50 fs/quota/dquot.c:1002
       __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1530
       ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206
       ocfs2_mknod+0xa67/0x2260 fs/ocfs2/namei.c:314
       ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:677
       vfs_create+0x2d1/0x460 fs/namei.c:4204
       filename_mknodat+0x3e8/0x660 fs/namei.c:5170
       __do_sys_mknod fs/namei.c:5207 [inline]
       __se_sys_mknod+0x3a/0x150 fs/namei.c:5204
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  fs_reclaim --> &dquot->dq_lock --> &ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]);
                               lock(&dquot->dq_lock);
                               lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]);
  lock(fs_reclaim);

 *** DEADLOCK ***

6 locks held by syz.7.7290/26915:
 #0: ffff888050330410 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
 #1: ffff88806e48c1a0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1074 [inline]
 #1: ffff88806e48c1a0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2914 [inline]
 #1: ffff88806e48c1a0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2938 [inline]
 #1: ffff88806e48c1a0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4950
 #2: ffff88806e60c1a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
 #2: ffff88806e60c1a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16d/0x4840 fs/ocfs2/suballoc.c:882
 #3: ffff888052ec86a0 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x293/0xb40 fs/ocfs2/quota_global.c:837
 #4: ffff88806e6089a0 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
 #4: ffff88806e6089a0 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1f9/0x3e0 fs/ocfs2/quota_global.c:313
 #5: ffff88806e608658 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x218/0x3e0 fs/ocfs2/quota_global.c:314

stack backtrace:
CPU: 0 UID: 0 PID: 26915 Comm: syz.7.7290 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043
 check_noncircular+0x12e/0x150 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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 __fs_reclaim_acquire mm/page_alloc.c:4325 [inline]
 fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4339
 might_alloc include/linux/sched/mm.h:317 [inline]
 slab_pre_alloc_hook mm/slub.c:4520 [inline]
 slab_alloc_node mm/slub.c:4875 [inline]
 __do_kmalloc_node mm/slub.c:5294 [inline]
 __kmalloc_noprof+0x9d/0x760 mm/slub.c:5307
 kmalloc_noprof include/linux/slab.h:954 [inline]
 find_tree_dqentry+0x5c/0x1070 fs/quota/quota_tree.c:663
 find_dqentry fs/quota/quota_tree.c:716 [inline]
 qtree_read_dquot+0x586/0x830 fs/quota/quota_tree.c:736
 ocfs2_acquire_dquot+0x2e9/0xb40 fs/ocfs2/quota_global.c:852
 dqget+0x73c/0xc50 fs/quota/dquot.c:1002
 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1530
 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206
 ocfs2_mknod+0xa67/0x2260 fs/ocfs2/namei.c:314
 ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:677
 vfs_create+0x2d1/0x460 fs/namei.c:4204
 filename_mknodat+0x3e8/0x660 fs/namei.c:5170
 __do_sys_mknod fs/namei.c:5207 [inline]
 __se_sys_mknod+0x3a/0x150 fs/namei.c:5204
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb382f9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb383ed9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007fb383215fa0 RCX: 00007fb382f9ce59
RDX: 000000000000070f RSI: 00000000000086ff RDI: 0000200000000000
RBP: 00007fb383032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb383216038 R14: 00007fb383215fa0 R15: 00007ffdffef4aa8
 </TASK>
(syz.7.7290,26915,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x1cec3d0f, computed 0xd2ffbdfe. Applying ECC.
(syz.7.7290,26915,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x2c7b5077, computed 0x4d558a87. Applying ECC.
(syz.7.7290,26915,0):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x2c7b5077, computed 0x5d2751af
(syz.7.7290,26915,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.7.7290,26915,0):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop7): find_tree_dqentry: Can't read quota tree block 5
Quota error (device loop7): qtree_read_dquot: Can't read quota structure for id 0
(syz.7.7290,26915,0):ocfs2_acquire_dquot:904 ERROR: status = -5
(syz.7.7290,26915,0):ocfs2_mknod:318 ERROR: status = -5
(syz.7.7290,26915,0):ocfs2_mknod:506 ERROR: status = -5
(syz.7.7290,26915,0):ocfs2_create:679 ERROR: status = -5