ocfs2: Mounting device (7,8) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.8.5074/25105 is trying to acquire lock:
ffff88807e33c098 (&new->rf_sem){+.+.}-{3:3}, at: __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline]
ffff88807e33c098 (&new->rf_sem){+.+.}-{3:3}, at: ocfs2_lock_refcount_tree+0x1aa/0x9d0 fs/ocfs2/refcounttree.c:463

but task is already holding lock:
ffff88804dbaa2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_remap_file_range+0x3d4/0x740 fs/ocfs2/file.c:2693

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #5 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       down_write+0x36/0x60 kernel/locking/rwsem.c:1573
       ocfs2_create_local_dquot+0x19a/0x1900 fs/ocfs2/quota_local.c:1224
       ocfs2_acquire_dquot+0x7e6/0xb80 fs/ocfs2/quota_global.c:871
       dqget+0x713/0xbb0 fs/quota/dquot.c:1013
       dquot_set_dqblk+0x27/0xfb0 fs/quota/dquot.c:2858
       quota_setquota+0x4d6/0x590 fs/quota/quota.c:310
       __do_sys_quotactl fs/quota/quota.c:960 [inline]
       __se_sys_quotactl+0x28b/0x6f0 fs/quota/quota.c:916
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #4 (&dquot->dq_lock){+.+.}-{3:3}:
       __mutex_lock_common kernel/locking/mutex.c:603 [inline]
       __mutex_lock+0x12d/0xae0 kernel/locking/mutex.c:747
       dquot_commit+0x5a/0x410 fs/quota/dquot.c:535
       ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6817
       mark_dquot_dirty fs/quota/dquot.c:400 [inline]
       mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:440
       __dquot_alloc_space+0x5f6/0xe50 fs/quota/dquot.c:1777
       dquot_alloc_space_nodirty include/linux/quotaops.h:293 [inline]
       dquot_alloc_space include/linux/quotaops.h:306 [inline]
       dquot_alloc_block include/linux/quotaops.h:330 [inline]
       ext4_mb_new_blocks+0xf55/0x44d0 fs/ext4/mballoc.c:5740
       ext4_ext_map_blocks+0x18d1/0x6640 fs/ext4/extents.c:4361
       ext4_map_blocks+0x9d7/0x1a90 fs/ext4/inode.c:681
       ext4_getblk+0x1c5/0x720 fs/ext4/inode.c:892
       ext4_bread+0x26/0x170 fs/ext4/inode.c:948
       ext4_append+0x2bb/0x560 fs/ext4/namei.c:83
       ext4_init_new_dir+0x2b8/0x550 fs/ext4/namei.c:3030
       ext4_mkdir+0x4c3/0xc90 fs/ext4/namei.c:3076
       vfs_mkdir+0x386/0x570 fs/namei.c:4157
       do_mkdirat+0x1d8/0x440 fs/namei.c:4182
       __do_sys_mkdirat fs/namei.c:4197 [inline]
       __se_sys_mkdirat fs/namei.c:4195 [inline]
       __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4195
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #3 (&ei->i_data_sem){++++}-{3:3}:
       down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520
       ext4_map_blocks+0x338/0x1a90 fs/ext4/inode.c:606
       ext4_append+0x22d/0x560 fs/ext4/namei.c:75
       ext4_init_new_dir+0x2b8/0x550 fs/ext4/namei.c:3030
       ext4_mkdir+0x4c3/0xc90 fs/ext4/namei.c:3076
       vfs_mkdir+0x386/0x570 fs/namei.c:4157
       do_mkdirat+0x1d8/0x440 fs/namei.c:4182
       __do_sys_mkdir fs/namei.c:4202 [inline]
       __se_sys_mkdir fs/namei.c:4200 [inline]
       __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4200
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #2 (jbd2_handle){++++}-{0:0}:
       jbd2_journal_lock_updates+0xa8/0x390 fs/jbd2/transaction.c:880
       __ocfs2_flush_truncate_log+0x2cf/0x1220 fs/ocfs2/alloc.c:6029
       ocfs2_flush_truncate_log+0x4b/0x60 fs/ocfs2/alloc.c:6076
       ocfs2_sync_fs+0x119/0x330 fs/ocfs2/super.c:402
       sync_filesystem+0x1be/0x220 fs/sync.c:66
       generic_shutdown_super+0x6b/0x340 fs/super.c:474
       kill_block_super+0x7c/0xe0 fs/super.c:1481
       deactivate_locked_super+0x93/0xf0 fs/super.c:332
       cleanup_mnt+0x471/0x4f0 fs/namespace.c:1191
       task_work_run+0x1d0/0x260 kernel/task_work.c:203
       resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
       exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
       exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
       __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
       syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
       do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}:
       down_write+0x36/0x60 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:764 [inline]
       ocfs2_remove_btree_range+0x64f/0x15e0 fs/ocfs2/alloc.c:5742
       ocfs2_commit_truncate+0xba2/0x1e00 fs/ocfs2/alloc.c:7353
       ocfs2_truncate_file+0xdf0/0x1660 fs/ocfs2/file.c:505
       ocfs2_setattr+0x16f8/0x1d90 fs/ocfs2/file.c:1212
       notify_change+0xca0/0xf90 fs/attr.c:499
       do_truncate+0x1ac/0x240 fs/open.c:65
       vfs_truncate+0x262/0x2f0 fs/open.c:111
       do_sys_truncate+0xf2/0x1c0 fs/open.c:134
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #0 (&new->rf_sem){+.+.}-{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+0x2d18/0x7c40 kernel/locking/lockdep.c:5063
       lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676
       down_write+0x36/0x60 kernel/locking/rwsem.c:1573
       __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline]
       ocfs2_lock_refcount_tree+0x1aa/0x9d0 fs/ocfs2/refcounttree.c:463
       ocfs2_reflink_remap_extent fs/ocfs2/refcounttree.c:4553 [inline]
       ocfs2_reflink_remap_blocks+0xce2/0x1aa0 fs/ocfs2/refcounttree.c:4690
       ocfs2_remap_file_range+0x4a7/0x740 fs/ocfs2/file.c:2703
       do_clone_file_range+0x265/0x2d0 fs/remap_range.c:396
       vfs_clone_file_range+0x1ec/0x4f0 fs/remap_range.c:414
       ioctl_file_clone fs/ioctl.c:239 [inline]
       ioctl_file_clone_range fs/ioctl.c:258 [inline]
       do_vfs_ioctl+0xe8d/0x1d40 fs/ioctl.c:823
       __do_sys_ioctl fs/ioctl.c:868 [inline]
       __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

other info that might help us debug this:

Chain exists of:
  &new->rf_sem --> &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(&new->rf_sem);

 *** DEADLOCK ***

3 locks held by syz.8.5074/25105:
 #0: ffff888076732460 (sb_writers#32){.+.+}-{0:0}, at: ioctl_file_clone fs/ioctl.c:239 [inline]
 #0: ffff888076732460 (sb_writers#32){.+.+}-{0:0}, at: ioctl_file_clone_range fs/ioctl.c:258 [inline]
 #0: ffff888076732460 (sb_writers#32){.+.+}-{0:0}, at: do_vfs_ioctl+0xe8d/0x1d40 fs/ioctl.c:823
 #1: ffff88804dbaa648 (&sb->s_type->i_mutex_key#35){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
 #1: ffff88804dbaa648 (&sb->s_type->i_mutex_key#35){+.+.}-{3:3}, at: lock_two_nondirectories+0xf7/0x150 fs/inode.c:1208
 #2: ffff88804dbaa2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_remap_file_range+0x3d4/0x740 fs/ocfs2/file.c:2693

stack backtrace:
CPU: 1 PID: 25105 Comm: syz.8.5074 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 check_noncircular+0x296/0x330 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+0x2d18/0x7c40 kernel/locking/lockdep.c:5063
 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676
 down_write+0x36/0x60 kernel/locking/rwsem.c:1573
 __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline]
 ocfs2_lock_refcount_tree+0x1aa/0x9d0 fs/ocfs2/refcounttree.c:463
 ocfs2_reflink_remap_extent fs/ocfs2/refcounttree.c:4553 [inline]
 ocfs2_reflink_remap_blocks+0xce2/0x1aa0 fs/ocfs2/refcounttree.c:4690
 ocfs2_remap_file_range+0x4a7/0x740 fs/ocfs2/file.c:2703
 do_clone_file_range+0x265/0x2d0 fs/remap_range.c:396
 vfs_clone_file_range+0x1ec/0x4f0 fs/remap_range.c:414
 ioctl_file_clone fs/ioctl.c:239 [inline]
 ioctl_file_clone_range fs/ioctl.c:258 [inline]
 do_vfs_ioctl+0xe8d/0x1d40 fs/ioctl.c:823
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa7e9f9e159
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:00007fa7e81f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa7ea225fa0 RCX: 00007fa7e9f9e159
RDX: 00002000000000c0 RSI: 000000004020940d RDI: 0000000000000005
RBP: 00007fa7ea035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa7ea226038 R14: 00007fa7ea225fa0 R15: 00007ffdeaa99118
 </TASK>