======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.1264/10251 is trying to acquire lock:
ffff888061983488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline]
ffff888061983488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_try_to_free_truncate_log+0xb1/0x370 fs/ocfs2/alloc.c:6122

but task is already holding lock:
ffff8880618b22e0
 (&ocfs2_quota_ip_alloc_sem_key
){++++}-{3:3}
, at: ocfs2_write_begin+0x193/0x310 fs/ocfs2/aops.c:1905

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       down_write+0x38/0x60 kernel/locking/rwsem.c:1551
       ocfs2_create_local_dquot+0x199/0x18d0 fs/ocfs2/quota_local.c:1224
       ocfs2_acquire_dquot+0x822/0xb30 fs/ocfs2/quota_global.c:871
       dqget+0x713/0xbb0 fs/quota/dquot.c:1010
       __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1539
       ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x90e/0x2460 fs/ocfs2/namei.c:311
       ocfs2_create+0x192/0x420 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3513 [inline]
       open_last_lookups fs/namei.c:3583 [inline]
       path_openat+0x120a/0x2fb0 fs/namei.c:3790
       do_filp_open+0x1df/0x400 fs/namei.c:3820
       do_sys_openat2+0x14b/0x500 fs/open.c:1255
       do_sys_open fs/open.c:1271 [inline]
       __do_sys_openat fs/open.c:1287 [inline]
       __se_sys_openat fs/open.c:1282 [inline]
       __x64_sys_openat+0x135/0x160 fs/open.c:1282
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #3 (&dquot->dq_lock){+.+.}-{3:3}
:
       __mutex_lock_common+0x1e5/0x2400 kernel/locking/mutex.c:596
       __mutex_lock kernel/locking/mutex.c:729 [inline]
       mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
       dquot_commit+0x5a/0x410 fs/quota/dquot.c:532
       ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6212
       mark_dquot_dirty fs/quota/dquot.c:397 [inline]
       mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:437
       __dquot_alloc_space+0x5cb/0xe10 fs/quota/dquot.c:1774
       dquot_alloc_space_nodirty include/linux/quotaops.h:290 [inline]
       dquot_alloc_space include/linux/quotaops.h:303 [inline]
       dquot_alloc_block include/linux/quotaops.h:327 [inline]
       ext4_mb_new_blocks+0xf80/0x47c0 fs/ext4/mballoc.c:5750
       ext4_ext_map_blocks+0x17d1/0x63d0 fs/ext4/extents.c:4372
       ext4_map_blocks+0x97f/0x1a50 fs/ext4/inode.c:675
       ext4_getblk+0x176/0x670 fs/ext4/inode.c:872
       ext4_bread+0x26/0x180 fs/ext4/inode.c:925
       ext4_append+0x2bb/0x560 fs/ext4/namei.c:83
       ext4_init_new_dir+0x2a7/0x910 fs/ext4/namei.c:3032
       ext4_mkdir+0x4c3/0xc90 fs/ext4/namei.c:3078
       vfs_mkdir+0x386/0x570 fs/namei.c:4116
       do_mkdirat+0x1dd/0x5c0 fs/namei.c:4141
       __do_sys_mkdirat fs/namei.c:4156 [inline]
       __se_sys_mkdirat fs/namei.c:4154 [inline]
       __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4154
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #2 (&ei->i_data_sem){++++}-{3:3}:
       down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498
       ext4_map_blocks+0x350/0x1a50 fs/ext4/inode.c:600
       ext4_append+0x22d/0x560 fs/ext4/namei.c:75
       ext4_init_new_dir+0x2a7/0x910 fs/ext4/namei.c:3032
       ext4_mkdir+0x4c3/0xc90 fs/ext4/namei.c:3078
       vfs_mkdir+0x386/0x570 fs/namei.c:4116
       do_mkdirat+0x1dd/0x5c0 fs/namei.c:4141
       __do_sys_mkdir fs/namei.c:4161 [inline]
       __se_sys_mkdir fs/namei.c:4159 [inline]
       __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4159
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #1
 (jbd2_handle){++++}-{0:0}:
       jbd2_journal_lock_updates+0xa4/0x390 fs/jbd2/transaction.c:881
       __ocfs2_flush_truncate_log+0x2b4/0x1110 fs/ocfs2/alloc.c:6027
       ocfs2_flush_truncate_log+0x4b/0x60 fs/ocfs2/alloc.c:6074
       ocfs2_sync_fs+0x119/0x330 fs/ocfs2/super.c:403
       sync_filesystem+0x1be/0x220 fs/sync.c:66
       generic_shutdown_super+0x6b/0x300 fs/super.c:448
       kill_block_super+0x7c/0xe0 fs/super.c:1438
       deactivate_locked_super+0x93/0xf0 fs/super.c:335
       cleanup_mnt+0x426/0x4d0 fs/namespace.c:1148
       task_work_run+0x125/0x1a0 kernel/task_work.c:188
       tracehook_notify_resume include/linux/tracehook.h:189 [inline]
       exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:184
       exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:217
       __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
       syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:310
       do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]
#6){+.+.}-{3:3}
:
       check_prev_add kernel/locking/lockdep.c:3120 [inline]
       check_prevs_add kernel/locking/lockdep.c:3239 [inline]
       validate_chain kernel/locking/lockdep.c:3855 [inline]
       __lock_acquire+0x38f7/0x7d40 kernel/locking/lockdep.c:5120
       lock_acquire+0x19f/0x400 kernel/locking/lockdep.c:5737
       down_write+0x38/0x60 kernel/locking/rwsem.c:1551
       inode_lock include/linux/fs.h:793 [inline]
       ocfs2_try_to_free_truncate_log+0xb1/0x370 fs/ocfs2/alloc.c:6122
       ocfs2_reserve_clusters_with_limit+0x48a/0xc10 fs/ocfs2/suballoc.c:1202
       ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1245 [inline]
       ocfs2_lock_allocators+0x2ce/0x5f0 fs/ocfs2/suballoc.c:2701
       ocfs2_write_begin_nolock+0x1b97/0x44b0 fs/ocfs2/aops.c:1743
       ocfs2_write_begin+0x1b4/0x310 fs/ocfs2/aops.c:1907
       generic_perform_write+0x2b6/0x550 mm/filemap.c:3785
       __generic_file_write_iter+0x261/0x4e0 mm/filemap.c:3912
       ocfs2_file_write_iter+0x171a/0x1ee0 fs/ocfs2/file.c:2472
       call_write_iter include/linux/fs.h:2179 [inline]
       new_sync_write fs/read_write.c:507 [inline]
       vfs_write+0x748/0xd70 fs/read_write.c:594
       ksys_write+0x153/0x260 fs/read_write.c:647
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x66/0xd0

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6 --> &dquot->dq_lock --> 
&ocfs2_quota_ip_alloc_sem_key

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(
&ocfs2_quota_ip_alloc_sem_key);
                               lock(&dquot->dq_lock);
                               lock(&ocfs2_quota_ip_alloc_sem_key
);
  lock(
&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6);

 *** DEADLOCK ***

4 locks held by syz.1.1264/10251:
 #0: 
ffff888025c96d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2bf/0x370 fs/file.c:1056
 #1: ffff8880636c6460 (sb_writers#22
){.+.+}-{0:0}, at: vfs_write+0x296/0xd70 fs/read_write.c:590
 #2: ffff8880618b2648 (&sb->s_type->i_mutex_key#27
){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline]
){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x437/0x1ee0 fs/ocfs2/file.c:2402
 #3: 
ffff8880618b22e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}
, at: ocfs2_write_begin+0x193/0x310 fs/ocfs2/aops.c:1905

stack backtrace:
CPU: 0 PID: 10251 Comm: syz.1.1264 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 check_noncircular+0x2f8/0x400 kernel/locking/lockdep.c:2178
 check_prev_add kernel/locking/lockdep.c:3120 [inline]
 check_prevs_add kernel/locking/lockdep.c:3239 [inline]
 validate_chain kernel/locking/lockdep.c:3855 [inline]
 __lock_acquire+0x38f7/0x7d40 kernel/locking/lockdep.c:5120
 lock_acquire+0x19f/0x400 kernel/locking/lockdep.c:5737
 down_write+0x38/0x60 kernel/locking/rwsem.c:1551
 inode_lock include/linux/fs.h:793 [inline]
 ocfs2_try_to_free_truncate_log+0xb1/0x370 fs/ocfs2/alloc.c:6122
 ocfs2_reserve_clusters_with_limit+0x48a/0xc10 fs/ocfs2/suballoc.c:1202
 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1245 [inline]
 ocfs2_lock_allocators+0x2ce/0x5f0 fs/ocfs2/suballoc.c:2701
 ocfs2_write_begin_nolock+0x1b97/0x44b0 fs/ocfs2/aops.c:1743
 ocfs2_write_begin+0x1b4/0x310 fs/ocfs2/aops.c:1907
 generic_perform_write+0x2b6/0x550 mm/filemap.c:3785
 __generic_file_write_iter+0x261/0x4e0 mm/filemap.c:3912
 ocfs2_file_write_iter+0x171a/0x1ee0 fs/ocfs2/file.c:2472
 call_write_iter include/linux/fs.h:2179 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x748/0xd70 fs/read_write.c:594
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f707a618199
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:00007f7078870028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f707a89ffa0 RCX: 00007f707a618199
RDX: 00000000fffffdef RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007f707a6af0b8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f707a8a0038 R14: 00007f707a89ffa0 R15: 00007ffefbef7d78
 </TASK>
kcov: kcov_task_exit: t = ffff88802b141dc0, kcov->t = ffff88802b141dc0