ocfs2: Mounting device (7,6) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc7-syzkaller-g82af5ea7c611 #0 Not tainted
------------------------------------------------------
syz.6.352/8671 is trying to acquire lock:
ffff0000f90ddbe0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314

but task is already holding lock:
ffff0000f90ddf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
ffff0000f90ddf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x18c/0x22c 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]#7){+.+.}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:869 [inline]
       ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
       dqget+0x654/0xccc fs/quota/dquot.c:977
       __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
       ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:310
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3717 [inline]
       open_last_lookups fs/namei.c:3816 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4052
       do_filp_open+0x18c/0x36c fs/namei.c:4082
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #5 (&dquot->dq_lock){+.+.}-{4:4}:
       __mutex_lock_common+0x1d0/0x2190 kernel/locking/mutex.c:602
       __mutex_lock kernel/locking/mutex.c:747 [inline]
       mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799
       wait_on_dquot fs/quota/dquot.c:354 [inline]
       dqget+0x5e4/0xccc fs/quota/dquot.c:972
       dquot_transfer+0x238/0x560 fs/quota/dquot.c:2140
       ext4_setattr+0x738/0x1810 fs/ext4/inode.c:5817
       notify_change+0x9a4/0xc50 fs/attr.c:552
       chown_common+0x374/0x4dc fs/open.c:790
       vfs_fchown fs/open.c:858 [inline]
       ksys_fchown+0xe0/0x158 fs/open.c:870
       __do_sys_fchown fs/open.c:875 [inline]
       __se_sys_fchown fs/open.c:873 [inline]
       __arm64_sys_fchown+0x7c/0x94 fs/open.c:873
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #4 (&ei->xattr_sem){++++}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
       ext4_xattr_set_handle+0x11c/0x1260 fs/ext4/xattr.c:2362
       ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44
       security_inode_init_security+0x6dc/0x7f4 security/security.c:1852
       ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58
       __ext4_new_inode+0x2854/0x3278 fs/ext4/ialloc.c:1325
       ext4_create+0x1f8/0x3fc fs/ext4/namei.c:2822
       lookup_open fs/namei.c:3717 [inline]
       open_last_lookups fs/namei.c:3816 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4052
       do_filp_open+0x18c/0x36c fs/namei.c:4082
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #3 (jbd2_handle){++++}-{0:0}:
       start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444
       jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540
       ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374
       ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
       dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
       dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
       ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
       ocfs2_fill_super+0x4018/0x5340 fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x360/0x414 fs/super.c:1681
       get_tree_bdev+0x2c/0x3c fs/super.c:1704
       ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
       vfs_get_tree+0x90/0x28c fs/super.c:1804
       do_new_mount+0x228/0x814 fs/namespace.c:3902
       path_mount+0x5b4/0xde0 fs/namespace.c:4226
       do_mount fs/namespace.c:4239 [inline]
       __do_sys_mount fs/namespace.c:4450 [inline]
       __se_sys_mount fs/namespace.c:4427 [inline]
       __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524
       ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372
       ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
       dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
       dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
       ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
       ocfs2_fill_super+0x4018/0x5340 fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x360/0x414 fs/super.c:1681
       get_tree_bdev+0x2c/0x3c fs/super.c:1704
       ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
       vfs_get_tree+0x90/0x28c fs/super.c:1804
       do_new_mount+0x228/0x814 fs/namespace.c:3902
       path_mount+0x5b4/0xde0 fs/namespace.c:4226
       do_mount fs/namespace.c:4239 [inline]
       __do_sys_mount fs/namespace.c:4450 [inline]
       __se_sys_mount fs/namespace.c:4427 [inline]
       __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #1 (sb_internal#5){.+.+}-{0:0}:
       percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
       percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
       __sb_start_write include/linux/fs.h:1795 [inline]
       sb_start_intwrite include/linux/fs.h:1978 [inline]
       ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
       ocfs2_write_begin_inline fs/ocfs2/aops.c:1458 [inline]
       ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1562 [inline]
       ocfs2_write_begin_nolock+0x8e4/0x3864 fs/ocfs2/aops.c:1648
       ocfs2_write_begin+0x1b4/0x30c fs/ocfs2/aops.c:1882
       generic_perform_write+0x23c/0x79c mm/filemap.c:4112
       __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4229
       ocfs2_file_write_iter+0x1328/0x1b84 fs/ocfs2/file.c:2469
       new_sync_write fs/read_write.c:593 [inline]
       vfs_write+0x62c/0x97c fs/read_write.c:686
       ksys_write+0x120/0x210 fs/read_write.c:738
       __do_sys_write fs/read_write.c:749 [inline]
       __se_sys_write fs/read_write.c:746 [inline]
       __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3168 [inline]
       check_prevs_add kernel/locking/lockdep.c:3287 [inline]
       validate_chain kernel/locking/lockdep.c:3911 [inline]
       __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240
       lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
       ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
       dqget+0x654/0xccc fs/quota/dquot.c:977
       __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
       ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:310
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3717 [inline]
       open_last_lookups fs/namei.c:3816 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4052
       do_filp_open+0x18c/0x36c fs/namei.c:4082
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1463
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

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]#7

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7);
                               lock(&dquot->dq_lock);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7);
  lock(&ocfs2_quota_ip_alloc_sem_key);

 *** DEADLOCK ***

5 locks held by syz.6.352/8671:
 #0: ffff0000d09bc428 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557
 #1: ffff0000f90d89c0 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
 #1: ffff0000f90d89c0 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: open_last_lookups fs/namei.c:3813 [inline]
 #1: ffff0000f90d89c0 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: path_openat+0x638/0x2c40 fs/namei.c:4052
 #2: ffff0000deafc2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
 #2: ffff0000deafc2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
 #3: ffff0000f67660a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x24c/0xa10 fs/ocfs2/quota_global.c:823
 #4: ffff0000f90ddf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
 #4: ffff0000f90ddf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313

stack backtrace:
CPU: 1 UID: 0 PID: 8671 Comm: syz.6.352 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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+0x324/0x32c kernel/locking/lockdep.c:2046
 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2178
 check_prev_add kernel/locking/lockdep.c:3168 [inline]
 check_prevs_add kernel/locking/lockdep.c:3287 [inline]
 validate_chain kernel/locking/lockdep.c:3911 [inline]
 __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
 ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
 ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
 dqget+0x654/0xccc fs/quota/dquot.c:977
 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505
 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202
 ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:310
 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673
 lookup_open fs/namei.c:3717 [inline]
 open_last_lookups fs/namei.c:3816 [inline]
 path_openat+0x12d8/0x2c40 fs/namei.c:4052
 do_filp_open+0x18c/0x36c fs/namei.c:4082
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1463
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596