(syz.2.204,7695,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xcfdff595, computed 0xefed4a20. Applying ECC.
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
6.15.0-rc4-syzkaller-00296-ge8ab83e34bdc #0 Not tainted
------------------------------------------------------
syz.2.204/7695 is trying to acquire lock:
ffff88805c6322e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314

but task is already holding lock:
ffff88805c632640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
ffff88805c632640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1ca/0x270 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}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
       down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:867 [inline]
       ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x2b0/0xb30 fs/ocfs2/quota_global.c:828
       dqget+0x7ae/0xf10 fs/quota/dquot.c:977
       __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1505
       ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x863/0x2050 fs/ocfs2/namei.c:310
       ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3701 [inline]
       open_last_lookups fs/namei.c:3800 [inline]
       path_openat+0x14f1/0x3830 fs/namei.c:4036
       do_filp_open+0x1fa/0x410 fs/namei.c:4066
       do_sys_openat2+0x121/0x1c0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_openat fs/open.c:1460 [inline]
       __se_sys_openat fs/open.c:1455 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1455
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #5 (&dquot->dq_lock){+.+.}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
       __mutex_lock_common kernel/locking/mutex.c:601 [inline]
       __mutex_lock+0x182/0xe80 kernel/locking/mutex.c:746
       wait_on_dquot fs/quota/dquot.c:354 [inline]
       dqget+0x72a/0xf10 fs/quota/dquot.c:972
       dquot_transfer+0x4b8/0x6d0 fs/quota/dquot.c:2154
       ext4_setattr+0x865/0x1bd0 fs/ext4/inode.c:5460
       notify_change+0xb33/0xe40 fs/attr.c:552
       chown_common+0x3f9/0x5a0 fs/open.c:782
       do_fchownat+0x161/0x270 fs/open.c:813
       __do_sys_chown fs/open.c:833 [inline]
       __se_sys_chown fs/open.c:831 [inline]
       __x64_sys_chown+0x82/0xa0 fs/open.c:831
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (&ei->xattr_sem){++++}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
       down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
       ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
       ext4_xattr_set_handle+0x165/0x1590 fs/ext4/xattr.c:2362
       ext4_initxattrs+0x9f/0x110 fs/ext4/xattr_security.c:44
       security_inode_init_security+0x29d/0x3f0 security/security.c:1852
       __ext4_new_inode+0x3257/0x3bd0 fs/ext4/ialloc.c:1326
       ext4_create+0x22d/0x460 fs/ext4/namei.c:2824
       lookup_open fs/namei.c:3701 [inline]
       open_last_lookups fs/namei.c:3800 [inline]
       path_openat+0x14f1/0x3830 fs/namei.c:4036
       do_filp_open+0x1fa/0x410 fs/namei.c:4066
       do_sys_openat2+0x121/0x1c0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_openat fs/open.c:1460 [inline]
       __se_sys_openat fs/open.c:1455 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1455
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (jbd2_handle){++++}-{0:0}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
       start_this_handle+0x1fa7/0x21c0 fs/jbd2/transaction.c:444
       jbd2__journal_start+0x2c1/0x5b0 fs/jbd2/transaction.c:501
       jbd2_journal_start+0x2a/0x40 fs/jbd2/transaction.c:540
       ocfs2_start_trans+0x376/0x6d0 fs/ocfs2/journal.c:352
       ocfs2_shutdown_local_alloc+0x200/0xa10 fs/ocfs2/localalloc.c:417
       ocfs2_dismount_volume+0x1f9/0x8d0 fs/ocfs2/super.c:1822
       generic_shutdown_super+0x132/0x2c0 fs/super.c:642
       kill_block_super+0x44/0x90 fs/super.c:1710
       deactivate_locked_super+0xb9/0x130 fs/super.c:473
       cleanup_mnt+0x425/0x4c0 fs/namespace.c:1435
       task_work_run+0x1d1/0x260 kernel/task_work.c:227
       resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50
       exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
       exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
       __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
       syscall_exit_to_user_mode+0x9a/0x120 kernel/entry/common.c:218
       do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524
       ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:350
       ocfs2_shutdown_local_alloc+0x200/0xa10 fs/ocfs2/localalloc.c:417
       ocfs2_dismount_volume+0x1f9/0x8d0 fs/ocfs2/super.c:1822
       generic_shutdown_super+0x132/0x2c0 fs/super.c:642
       kill_block_super+0x44/0x90 fs/super.c:1710
       deactivate_locked_super+0xb9/0x130 fs/super.c:473
       cleanup_mnt+0x425/0x4c0 fs/namespace.c:1435
       task_work_run+0x1d1/0x260 kernel/task_work.c:227
       resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50
       exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
       exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
       __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
       syscall_exit_to_user_mode+0x9a/0x120 kernel/entry/common.c:218
       do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#6){.+.+}-{0:0}:
       reacquire_held_locks+0x127/0x1d0 kernel/locking/lockdep.c:5383
       __lock_release kernel/locking/lockdep.c:5572 [inline]
       lock_release+0x1b4/0x3e0 kernel/locking/lockdep.c:5887
       up_write+0x2d/0x420 kernel/locking/rwsem.c:1629
       inode_unlock include/linux/fs.h:872 [inline]
       ocfs2_free_ac_resource fs/ocfs2/suballoc.c:130 [inline]
       ocfs2_free_alloc_context+0x97/0x1a0 fs/ocfs2/suballoc.c:144
       ocfs2_write_begin_nolock+0x4296/0x4340 fs/ocfs2/aops.c:1803
       ocfs2_write_begin+0x1bb/0x310 fs/ocfs2/aops.c:1882
       generic_perform_write+0x2c4/0x910 mm/filemap.c:4103
       ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469
       new_sync_write fs/read_write.c:591 [inline]
       vfs_write+0x548/0xa90 fs/read_write.c:684
       ksys_pwrite64 fs/read_write.c:791 [inline]
       __do_sys_pwrite64 fs/read_write.c:799 [inline]
       __se_sys_pwrite64 fs/read_write.c:796 [inline]
       __x64_sys_pwrite64+0x193/0x220 fs/read_write.c:796
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3166 [inline]
       check_prevs_add kernel/locking/lockdep.c:3285 [inline]
       validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909
       __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
       down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
       ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314
       ocfs2_acquire_dquot+0x2b0/0xb30 fs/ocfs2/quota_global.c:828
       dqget+0x7ae/0xf10 fs/quota/dquot.c:977
       __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1505
       ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x863/0x2050 fs/ocfs2/namei.c:310
       ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3701 [inline]
       open_last_lookups fs/namei.c:3800 [inline]
       path_openat+0x14f1/0x3830 fs/namei.c:4036
       do_filp_open+0x1fa/0x410 fs/namei.c:4066
       do_sys_openat2+0x121/0x1c0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_openat fs/open.c:1460 [inline]
       __se_sys_openat fs/open.c:1455 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1455
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf6/0x210 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:
  &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.2.204/7695:
 #0: ffff888021eb6420 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556
 #1: ffff8880524f42c0 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #1: ffff8880524f42c0 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: open_last_lookups fs/namei.c:3797 [inline]
 #1: ffff8880524f42c0 (&type->i_mutex_dir_key#17){++++}-{4:4}, at: path_openat+0x8da/0x3830 fs/namei.c:4036
 #2: ffff88805c4042c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #2: ffff88805c4042c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x45f0 fs/ocfs2/suballoc.c:786
 #3: ffff88805253c0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x2a3/0xb30 fs/ocfs2/quota_global.c:823
 #4: ffff88805c632640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #4: ffff88805c632640 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313

stack backtrace:
CPU: 0 UID: 0 PID: 7695 Comm: syz.2.204 Not tainted 6.15.0-rc4-syzkaller-00296-ge8ab83e34bdc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2079
 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2211
 check_prev_add kernel/locking/lockdep.c:3166 [inline]
 check_prevs_add kernel/locking/lockdep.c:3285 [inline]
 validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909
 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866
 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
 ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314
 ocfs2_acquire_dquot+0x2b0/0xb30 fs/ocfs2/quota_global.c:828
 dqget+0x7ae/0xf10 fs/quota/dquot.c:977
 __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1505
 ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:202
 ocfs2_mknod+0x863/0x2050 fs/ocfs2/namei.c:310
 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:673
 lookup_open fs/namei.c:3701 [inline]
 open_last_lookups fs/namei.c:3800 [inline]
 path_openat+0x14f1/0x3830 fs/namei.c:4036
 do_filp_open+0x1fa/0x410 fs/namei.c:4066
 do_sys_openat2+0x121/0x1c0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb4b058e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb4b14ae038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb4b07b5fa0 RCX: 00007fb4b058e969
RDX: 00000000000201c2 RSI: 0000200000000200 RDI: ffffffffffffff9c
RBP: 00007fb4b0610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb4b07b5fa0 R15: 00007ffdd302fb78
 </TASK>
(syz.2.204,7695,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x2c7b5077, computed 0x28030c75. Applying ECC.
(syz.2.204,7695,0):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x2c7b5077, computed 0x28d1d8ae
(syz.2.204,7695,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.2.204,7695,0):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop2): find_tree_dqentry: Can't read quota tree block 5
Quota error (device loop2): qtree_read_dquot: Can't read quota structure for id 0
(syz.2.204,7695,1):ocfs2_acquire_dquot:890 ERROR: status = -5
(syz.2.204,7695,1):ocfs2_mknod:314 ERROR: status = -5
(syz.2.204,7695,1):ocfs2_mknod:502 ERROR: status = -5
(syz.2.204,7695,0):ocfs2_create:675 ERROR: status = -5