======================================================
WARNING: possible circular locking dependency detected
5.15.181-syzkaller #0 Not tainted
------------------------------------------------------
syz.3.566/7589 is trying to acquire lock:
ffff0000e873df48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
ffff0000e873df48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313

but task is already holding lock:
ffff0000f83000a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x238/0xa2c fs/ocfs2/quota_global.c:811

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #6 (&dquot->dq_lock){+.+.}-{3:3}:
       __mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596
       __mutex_lock kernel/locking/mutex.c:729 [inline]
       mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743
       dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507
       ext4_write_dquot+0x1b4/0x31c fs/ext4/super.c:6180
       ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6257
       mark_dquot_dirty fs/quota/dquot.c:372 [inline]
       mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412
       __dquot_alloc_space+0x560/0xd0c fs/quota/dquot.c:1752
       dquot_alloc_space_nodirty include/linux/quotaops.h:297 [inline]
       dquot_alloc_space include/linux/quotaops.h:310 [inline]
       dquot_alloc_block include/linux/quotaops.h:334 [inline]
       ext4_mb_new_blocks+0xd30/0x4024 fs/ext4/mballoc.c:5739
       ext4_ext_map_blocks+0xf70/0x5628 fs/ext4/extents.c:4339
       ext4_map_blocks+0x7b8/0x167c fs/ext4/inode.c:673
       ext4_getblk+0x138/0x5f0 fs/ext4/inode.c:870
       ext4_bread+0x3c/0x1d4 fs/ext4/inode.c:923
       ext4_append+0x238/0x474 fs/ext4/namei.c:83
       ext4_init_new_dir+0x258/0x864 fs/ext4/namei.c:3030
       ext4_mkdir+0x3c0/0xa40 fs/ext4/namei.c:3076
       vfs_mkdir+0x314/0x4d4 fs/namei.c:4065
       do_mkdirat+0x1bc/0x508 fs/namei.c:4090
       __do_sys_mkdirat fs/namei.c:4105 [inline]
       __se_sys_mkdirat fs/namei.c:4103 [inline]
       __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #5 (&ei->i_data_sem){++++}-{3:3}:
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       ext4_map_blocks+0x71c/0x167c fs/ext4/inode.c:666
       mpage_map_one_extent fs/ext4/inode.c:2408 [inline]
       mpage_map_and_submit_extent fs/ext4/inode.c:2461 [inline]
       ext4_writepages+0xf00/0x2c14 fs/ext4/inode.c:2829
       do_writepages+0x36c/0x578 mm/page-writeback.c:2386
       __writeback_single_inode+0x148/0x11f0 fs/fs-writeback.c:1647
       writeback_sb_inodes+0x7fc/0x1378 fs/fs-writeback.c:1930
       __writeback_inodes_wb+0x110/0x394 fs/fs-writeback.c:2001
       wb_writeback+0x3ec/0xe44 fs/fs-writeback.c:2106
       wb_check_background_flush fs/fs-writeback.c:2172 [inline]
       wb_do_writeback fs/fs-writeback.c:2260 [inline]
       wb_workfn+0xa7c/0xdd8 fs/fs-writeback.c:2288
       process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
       worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
       kthread+0x374/0x454 kernel/kthread.c:334
       ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

-> #4 (jbd2_handle){++++}-{0:0}:
       start_this_handle+0xef4/0x11a4 fs/jbd2/transaction.c:464
       jbd2__journal_start+0x28c/0x744 fs/jbd2/transaction.c:521
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:560
       ocfs2_start_trans+0x43c/0x794 fs/ocfs2/journal.c:354
       ocfs2_shutdown_local_alloc+0x1ac/0x7e4 fs/ocfs2/localalloc.c:416
       ocfs2_dismount_volume+0x1cc/0x8ac fs/ocfs2/super.c:1882
       ocfs2_put_super+0xec/0x308 fs/ocfs2/super.c:1610
       generic_shutdown_super+0x130/0x2f0 fs/super.c:475
       kill_block_super+0x70/0xdc fs/super.c:1427
       deactivate_locked_super+0xb8/0x13c fs/super.c:335
       deactivate_super+0xf8/0x118 fs/super.c:366
       cleanup_mnt+0x3a4/0x458 fs/namespace.c:1143
       __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
       task_work_run+0x12c/0x1e0 kernel/task_work.c:188
       tracehook_notify_resume include/linux/tracehook.h:189 [inline]
       do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
       prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
       exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
       el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
       el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #3 (&journal->j_trans_barrier){.+.+}-{3:3}:
       down_read+0xc0/0x390 kernel/locking/rwsem.c:1498
       ocfs2_start_trans+0x430/0x794 fs/ocfs2/journal.c:352
       ocfs2_shutdown_local_alloc+0x1ac/0x7e4 fs/ocfs2/localalloc.c:416
       ocfs2_dismount_volume+0x1cc/0x8ac fs/ocfs2/super.c:1882
       ocfs2_put_super+0xec/0x308 fs/ocfs2/super.c:1610
       generic_shutdown_super+0x130/0x2f0 fs/super.c:475
       kill_block_super+0x70/0xdc fs/super.c:1427
       deactivate_locked_super+0xb8/0x13c fs/super.c:335
       deactivate_super+0xf8/0x118 fs/super.c:366
       cleanup_mnt+0x3a4/0x458 fs/namespace.c:1143
       __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
       task_work_run+0x12c/0x1e0 kernel/task_work.c:188
       tracehook_notify_resume include/linux/tracehook.h:189 [inline]
       do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
       prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
       exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
       el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
       el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #2 (sb_internal#5){.+.+}-{0:0}:
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1811 [inline]
       sb_start_intwrite include/linux/fs.h:1928 [inline]
       ocfs2_start_trans+0x2c4/0x794 fs/ocfs2/journal.c:350
       ocfs2_write_info+0x114/0x324 fs/ocfs2/quota_global.c:982
       dquot_set_dqinfo+0x370/0x5d8 fs/quota/dquot.c:2904
       quota_setinfo+0x320/0x3a8 fs/quota/quota.c:173
       do_quotactl+0x59c/0x738 fs/quota/quota.c:795
       __do_sys_quotactl fs/quota/quota.c:959 [inline]
       __se_sys_quotactl fs/quota/quota.c:915 [inline]
       __arm64_sys_quotactl+0x2ac/0x734 fs/quota/quota.c:915
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #1 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
       ocfs2_write_info+0xdc/0x324 fs/ocfs2/quota_global.c:979
       dquot_set_dqinfo+0x370/0x5d8 fs/quota/dquot.c:2904
       quota_setinfo+0x320/0x3a8 fs/quota/quota.c:173
       do_quotactl+0x59c/0x738 fs/quota/quota.c:795
       __do_sys_quotactl fs/quota/quota.c:959 [inline]
       __se_sys_quotactl fs/quota/quota.c:915 [inline]
       __arm64_sys_quotactl+0x2ac/0x734 fs/quota/quota.c:915
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3053 [inline]
       check_prevs_add kernel/locking/lockdep.c:3172 [inline]
       validate_chain kernel/locking/lockdep.c:3788 [inline]
       __lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012
       lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       inode_lock include/linux/fs.h:787 [inline]
       ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x244/0xa2c fs/ocfs2/quota_global.c:816
       dqget+0x658/0xcf4 fs/quota/dquot.c:988
       __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1517
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1579
       ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x758/0x1e88 fs/ocfs2/namei.c:310
       ocfs2_create+0x180/0x468 fs/ocfs2/namei.c:674
       lookup_open fs/namei.c:3462 [inline]
       open_last_lookups fs/namei.c:3532 [inline]
       path_openat+0x1144/0x26e4 fs/namei.c:3739
       do_filp_open+0x164/0x330 fs/namei.c:3769
       do_sys_openat2+0x128/0x3d8 fs/open.c:1253
       do_sys_open fs/open.c:1269 [inline]
       __do_sys_openat fs/open.c:1285 [inline]
       __se_sys_openat fs/open.c:1280 [inline]
       __arm64_sys_openat+0x120/0x154 fs/open.c:1280
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7 --> &ei->i_data_sem --> &dquot->dq_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&dquot->dq_lock);
                               lock(&ei->i_data_sem);
                               lock(&dquot->dq_lock);
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7);

 *** DEADLOCK ***

4 locks held by syz.3.566/7589:
 #0: ffff0000d777a460 (sb_writers#34){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377
 #1: ffff0000e873b488 (&type->i_mutex_dir_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #1: ffff0000e873b488 (&type->i_mutex_dir_key#20){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline]
 #1: ffff0000e873b488 (&type->i_mutex_dir_key#20){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739
 #2: ffff0000e87309c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #2: ffff0000e87309c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3a68 fs/ocfs2/suballoc.c:782
 #3: ffff0000f83000a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x238/0xa2c fs/ocfs2/quota_global.c:811

stack backtrace:
CPU: 0 PID: 7589 Comm: syz.3.566 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2011
 check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2133
 check_prev_add kernel/locking/lockdep.c:3053 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain kernel/locking/lockdep.c:3788 [inline]
 __lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
 inode_lock include/linux/fs.h:787 [inline]
 ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
 ocfs2_acquire_dquot+0x244/0xa2c fs/ocfs2/quota_global.c:816
 dqget+0x658/0xcf4 fs/quota/dquot.c:988
 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1517
 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1579
 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202
 ocfs2_mknod+0x758/0x1e88 fs/ocfs2/namei.c:310
 ocfs2_create+0x180/0x468 fs/ocfs2/namei.c:674
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0x1144/0x26e4 fs/namei.c:3739
 do_filp_open+0x164/0x330 fs/namei.c:3769
 do_sys_openat2+0x128/0x3d8 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1280
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584