ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.672/7938 is trying to acquire lock:
ffff0000f64214a0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_lock_global_qf+0x1ac/0x23c fs/ocfs2/quota_global.c:314

but task is already holding lock:
ffff0000f6421808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
ffff0000f6421808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x190/0x23c fs/ocfs2/quota_global.c:313

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #6 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}:
       down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:758 [inline]
       ocfs2_lock_global_qf+0x190/0x23c fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x260/0xab0 fs/ocfs2/quota_global.c:816
       dqget+0x638/0xa98 fs/quota/dquot.c:1013
       __dquot_initialize+0x2e4/0xb30 fs/quota/dquot.c:1542
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1604
       ocfs2_get_init_inode+0x140/0x1b4 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x7d4/0x218c fs/ocfs2/namei.c:310
       ocfs2_mkdir+0x19c/0x51c fs/ocfs2/namei.c:657
       vfs_mkdir+0x314/0x4d8 fs/namei.c:4114
       do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
       __do_sys_mkdirat fs/namei.c:4154 [inline]
       __se_sys_mkdirat fs/namei.c:4152 [inline]
       __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 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

-> #5 (&dquot->dq_lock){+.+.}-{3:3}:
       __mutex_lock_common+0x1a0/0x1f3c kernel/locking/mutex.c:603
       __mutex_lock kernel/locking/mutex.c:747 [inline]
       mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
       dquot_commit+0x54/0x1c8 fs/quota/dquot.c:535
       ext4_write_dquot+0x1b4/0x320 fs/ext4/super.c:6817
       ext4_mark_dquot_dirty+0xe8/0x150 fs/ext4/super.c:6894
       mark_dquot_dirty fs/quota/dquot.c:400 [inline]
       mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:440
       __dquot_free_space+0x768/0xaa4 fs/quota/dquot.c:1967
       dquot_free_space_nodirty include/linux/quotaops.h:372 [inline]
       dquot_free_space include/linux/quotaops.h:377 [inline]
       dquot_free_block include/linux/quotaops.h:388 [inline]
       ext4_mb_clear_bb fs/ext4/mballoc.c:6153 [inline]
       ext4_free_blocks+0x18dc/0x2468 fs/ext4/mballoc.c:6283
       ext4_remove_blocks fs/ext4/extents.c:2541 [inline]
       ext4_ext_rm_leaf fs/ext4/extents.c:2707 [inline]
       ext4_ext_remove_space+0x1618/0x3b98 fs/ext4/extents.c:2955
       ext4_ext_truncate+0x170/0x218 fs/ext4/extents.c:4491
       ext4_truncate+0xa00/0x1090 fs/ext4/inode.c:4302
       ext4_setattr+0xe34/0x15e4 fs/ext4/inode.c:5668
       notify_change+0xb5c/0xe20 fs/attr.c:499
       do_truncate+0x188/0x20c fs/open.c:65
       handle_truncate fs/namei.c:3293 [inline]
       do_open fs/namei.c:3638 [inline]
       path_openat+0x21c8/0x27a0 fs/namei.c:3791
       do_filp_open+0x198/0x38c fs/namei.c:3818
       do_sys_openat2+0x134/0x3fc fs/open.c:1320
       do_sys_open fs/open.c:1336 [inline]
       __do_sys_openat fs/open.c:1352 [inline]
       __se_sys_openat fs/open.c:1347 [inline]
       __arm64_sys_openat+0x11c/0x150 fs/open.c:1347
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 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

-> #4 (&ei->i_data_sem){++++}-{3:3}:
       down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
       ext4_map_blocks+0x720/0x160c fs/ext4/inode.c:674
       mpage_map_one_extent fs/ext4/inode.c:2436 [inline]
       mpage_map_and_submit_extent fs/ext4/inode.c:2489 [inline]
       ext4_writepages+0xdbc/0x28fc fs/ext4/inode.c:2857
       do_writepages+0x2c4/0x50c mm/page-writeback.c:2491
       __writeback_single_inode+0x164/0x157c fs/fs-writeback.c:1673
       writeback_sb_inodes+0x870/0x1470 fs/fs-writeback.c:1964
       __writeback_inodes_wb+0x104/0x370 fs/fs-writeback.c:2035
       wb_writeback+0x420/0xfdc fs/fs-writeback.c:2140
       wb_check_background_flush fs/fs-writeback.c:2206 [inline]
       wb_do_writeback fs/fs-writeback.c:2294 [inline]
       wb_workfn+0xb40/0xe18 fs/fs-writeback.c:2321
       process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
       worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
       kthread+0x254/0x2e0 kernel/kthread.c:376
       ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850

-> #3 (jbd2_handle){++++}-{0:0}:
       wait_transaction_locked+0x184/0x23c fs/jbd2/transaction.c:177
       add_transaction_credits+0x104/0xaf0 fs/jbd2/transaction.c:-1
       start_this_handle+0x4dc/0x125c fs/jbd2/transaction.c:422
       jbd2__journal_start+0x288/0x530 fs/jbd2/transaction.c:520
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:559
       ocfs2_start_trans+0x398/0x6f4 fs/ocfs2/journal.c:376
       ocfs2_del_inode_from_orphan+0x13c/0x644 fs/ocfs2/namei.c:2722
       ocfs2_dio_end_io_write fs/ocfs2/aops.c:2416 [inline]
       ocfs2_dio_end_io+0xd60/0x1098 fs/ocfs2/aops.c:2451
       dio_complete+0x218/0x640 fs/direct-io.c:271
       __blockdev_direct_IO+0x27f0/0x31e0 fs/direct-io.c:1320
       ocfs2_direct_IO+0x208/0x278 fs/ocfs2/aops.c:2488
       generic_file_direct_write+0x104/0x2b4 mm/filemap.c:3787
       __generic_file_write_iter+0x144/0x250 mm/filemap.c:3945
       ocfs2_file_write_iter+0x13ac/0x1cd0 fs/ocfs2/file.c:2469
       do_iter_readv_writev fs/read_write.c:-1 [inline]
       do_iter_write+0x520/0x93c fs/read_write.c:861
       vfs_iter_write+0x88/0xac fs/read_write.c:902
       iter_file_splice_write+0x528/0xa38 fs/splice.c:685
       do_splice_from fs/splice.c:763 [inline]
       direct_splice_actor+0xe4/0x138 fs/splice.c:950
       splice_direct_to_actor+0x3ec/0x9e4 fs/splice.c:896
       do_splice_direct+0x168/0x25c fs/splice.c:1002
       do_sendfile+0x460/0xc8c fs/read_write.c:1255
       __do_sys_sendfile64 fs/read_write.c:1323 [inline]
       __se_sys_sendfile64 fs/read_write.c:1309 [inline]
       __arm64_sys_sendfile64+0x138/0x374 fs/read_write.c:1309
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 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

-> #2 (&journal->j_trans_barrier){.+.+}-{3:3}:
       down_read+0x64/0x300 kernel/locking/rwsem.c:1520
       ocfs2_start_trans+0x38c/0x6f4 fs/ocfs2/journal.c:374
       ocfs2_modify_bh+0xd8/0x44c fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x1054/0x13c4 fs/ocfs2/quota_local.c:764
       dquot_load_quota_sb+0x68c/0x998 fs/quota/dquot.c:2495
       dquot_load_quota_inode+0x274/0x4dc fs/quota/dquot.c:2532
       ocfs2_enable_quotas+0x17c/0x3c4 fs/ocfs2/super.c:926
       ocfs2_fill_super+0x32f8/0x417c fs/ocfs2/super.c:1139
       mount_bdev+0x264/0x35c fs/super.c:1443
       ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1186
       legacy_get_tree+0xd8/0x174 fs/fs_context.c:632
       vfs_get_tree+0x90/0x278 fs/super.c:1573
       do_new_mount+0x228/0x804 fs/namespace.c:3078
       path_mount+0x5ac/0xe6c fs/namespace.c:3408
       do_mount fs/namespace.c:3421 [inline]
       __do_sys_mount fs/namespace.c:3629 [inline]
       __se_sys_mount fs/namespace.c:3606 [inline]
       __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3606
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 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

-> #1 (sb_internal#3){.+.+}-{0:0}:
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1891 [inline]
       sb_start_intwrite include/linux/fs.h:2013 [inline]
       ocfs2_start_trans+0x20c/0x6f4 fs/ocfs2/journal.c:372
       ocfs2_write_info+0x110/0x334 fs/ocfs2/quota_global.c:982
       dquot_set_dqinfo+0x36c/0x5b4 fs/quota/dquot.c:2936
       quota_setinfo+0x304/0x3a0 fs/quota/quota.c:174
       do_quotactl+0x59c/0x738 fs/quota/quota.c:796
       __do_sys_quotactl fs/quota/quota.c:960 [inline]
       __se_sys_quotactl fs/quota/quota.c:916 [inline]
       __arm64_sys_quotactl+0x2dc/0x77c fs/quota/quota.c:916
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 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

-> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3095 [inline]
       check_prevs_add kernel/locking/lockdep.c:3214 [inline]
       validate_chain kernel/locking/lockdep.c:3830 [inline]
       __lock_acquire+0x2808/0x6634 kernel/locking/lockdep.c:5063
       lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
       down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
       ocfs2_lock_global_qf+0x1ac/0x23c fs/ocfs2/quota_global.c:314
       ocfs2_acquire_dquot+0x260/0xab0 fs/ocfs2/quota_global.c:816
       dqget+0x638/0xa98 fs/quota/dquot.c:1013
       __dquot_initialize+0x2e4/0xb30 fs/quota/dquot.c:1542
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1604
       ocfs2_get_init_inode+0x140/0x1b4 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x7d4/0x218c fs/ocfs2/namei.c:310
       ocfs2_mkdir+0x19c/0x51c fs/ocfs2/namei.c:657
       vfs_mkdir+0x314/0x4d8 fs/namei.c:4114
       do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
       __do_sys_mkdirat fs/namei.c:4154 [inline]
       __se_sys_mkdirat fs/namei.c:4152 [inline]
       __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x128 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

other info that might help us debug this:

Chain exists of:
  &ocfs2_quota_ip_alloc_sem_key --> &dquot->dq_lock --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8);
                               lock(&dquot->dq_lock);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8);
  lock(&ocfs2_quota_ip_alloc_sem_key);

 *** DEADLOCK ***

5 locks held by syz.4.672/7938:
 #0: ffff0000ecaae460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
 #1: ffff0000f6425f48 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
 #1: ffff0000f6425f48 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: filename_create+0x1b0/0x3a8 fs/namei.c:3884
 #2: ffff0000e1be5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #2: ffff0000e1be5108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x110/0x3d40 fs/ocfs2/suballoc.c:804
 #3: ffff0000e05f40a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x254/0xab0 fs/ocfs2/quota_global.c:811
 #4: ffff0000f6421808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #4: ffff0000f6421808 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x190/0x23c fs/ocfs2/quota_global.c:313

stack backtrace:
CPU: 1 PID: 7938 Comm: syz.4.672 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048
 check_noncircular+0x264/0x2f8 kernel/locking/lockdep.c:2170
 check_prev_add kernel/locking/lockdep.c:3095 [inline]
 check_prevs_add kernel/locking/lockdep.c:3214 [inline]
 validate_chain kernel/locking/lockdep.c:3830 [inline]
 __lock_acquire+0x2808/0x6634 kernel/locking/lockdep.c:5063
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
 ocfs2_lock_global_qf+0x1ac/0x23c fs/ocfs2/quota_global.c:314
 ocfs2_acquire_dquot+0x260/0xab0 fs/ocfs2/quota_global.c:816
 dqget+0x638/0xa98 fs/quota/dquot.c:1013
 __dquot_initialize+0x2e4/0xb30 fs/quota/dquot.c:1542
 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1604
 ocfs2_get_init_inode+0x140/0x1b4 fs/ocfs2/namei.c:202
 ocfs2_mknod+0x7d4/0x218c fs/ocfs2/namei.c:310
 ocfs2_mkdir+0x19c/0x51c fs/ocfs2/namei.c:657
 vfs_mkdir+0x314/0x4d8 fs/namei.c:4114
 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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