ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz-executor421/5647 is trying to acquire lock:
ffff888070119458 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa7/0x2f0 fs/ocfs2/refcounttree.c:932

but task is already holding lock:
ffff8880701194e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0x9f/0x2f0 fs/ocfs2/refcounttree.c:931

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574
       ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367
       ocfs2_mknod+0x173c/0x2770 fs/ocfs2/namei.c:414
       ocfs2_create+0xf4/0x430 fs/ocfs2/namei.c:677
       lookup_open fs/namei.c:4508 [inline]
       open_last_lookups fs/namei.c:4608 [inline]
       path_openat+0x341f/0x4280 fs/namei.c:4860
       do_file_open+0x20e/0x430 fs/namei.c:4892
       do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
       do_sys_open fs/open.c:1374 [inline]
       __do_sys_openat fs/open.c:1390 [inline]
       __se_sys_openat fs/open.c:1385 [inline]
       __x64_sys_openat+0x12d/0x210 fs/open.c:1385
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574
       ocfs2_start_trans+0x5cc/0x8f0 fs/ocfs2/journal.c:369
       ocfs2_modify_bh+0xbe/0x440 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0xd5c/0x1640 fs/ocfs2/quota_local.c:767
       dquot_load_quota_sb+0x7c1/0x11d0 fs/quota/dquot.c:2484
       dquot_load_quota_inode fs/quota/dquot.c:2521 [inline]
       dquot_load_quota_inode+0x2a3/0x470 fs/quota/dquot.c:2513
       ocfs2_enable_quotas+0x28a/0x5a0 fs/ocfs2/super.c:930
       ocfs2_fill_super.cold+0x1cd/0x3ae fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x38c/0x620 fs/super.c:1640
       vfs_get_tree+0x92/0x320 fs/super.c:1700
       fc_mount fs/namespace.c:1198 [inline]
       do_new_mount_fc fs/namespace.c:3765 [inline]
       do_new_mount fs/namespace.c:3841 [inline]
       path_mount+0x7d0/0x23d0 fs/namespace.c:4161
       do_mount fs/namespace.c:4174 [inline]
       __do_sys_mount fs/namespace.c:4390 [inline]
       __se_sys_mount fs/namespace.c:4367 [inline]
       __x64_sys_mount+0x293/0x310 fs/namespace.c:4367
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#2){.+.+}-{0:0}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       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/super.h:19 [inline]
       sb_start_intwrite include/linux/fs/super.h:177 [inline]
       ocfs2_start_trans+0x4bb/0x8f0 fs/ocfs2/journal.c:367
       ocfs2_orphan_for_truncate fs/ocfs2/file.c:397 [inline]
       ocfs2_truncate_file+0x503/0x17c0 fs/ocfs2/file.c:506
       ocfs2_setattr+0x14a0/0x2680 fs/ocfs2/file.c:1224
       notify_change+0xb25/0x1330 fs/attr.c:556
       do_truncate+0x1df/0x240 fs/open.c:68
       handle_truncate fs/namei.c:4305 [inline]
       do_open fs/namei.c:4704 [inline]
       path_openat+0x370f/0x4280 fs/namei.c:4863
       do_file_open+0x20e/0x430 fs/namei.c:4892
       do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
       do_sys_open fs/open.c:1374 [inline]
       __do_sys_open fs/open.c:1382 [inline]
       __se_sys_open fs/open.c:1378 [inline]
       __x64_sys_open+0xfe/0x1d0 fs/open.c:1378
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_alloc_sem){+.+.}-{4:4}:
       check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631
       ocfs2_try_remove_refcount_tree+0xa7/0x2f0 fs/ocfs2/refcounttree.c:932
       ocfs2_truncate_file+0xb57/0x17c0 fs/ocfs2/file.c:527
       ocfs2_setattr+0x14a0/0x2680 fs/ocfs2/file.c:1224
       notify_change+0xb25/0x1330 fs/attr.c:556
       do_truncate+0x1df/0x240 fs/open.c:68
       handle_truncate fs/namei.c:4305 [inline]
       do_open fs/namei.c:4704 [inline]
       path_openat+0x370f/0x4280 fs/namei.c:4863
       do_file_open+0x20e/0x430 fs/namei.c:4892
       do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
       do_sys_open fs/open.c:1374 [inline]
       __do_sys_open fs/open.c:1382 [inline]
       __se_sys_open fs/open.c:1378 [inline]
       __x64_sys_open+0xfe/0x1d0 fs/open.c:1378
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 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:
  &oi->ip_alloc_sem --> &journal->j_trans_barrier --> &oi->ip_xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_xattr_sem);
                               lock(&journal->j_trans_barrier);
                               lock(&oi->ip_xattr_sem);
  lock(&oi->ip_alloc_sem);

 *** DEADLOCK ***

3 locks held by syz-executor421/5647:
 #0: ffff88807fb50450 (sb_writers#8){.+.+}-{0:0}, at: do_open fs/namei.c:4693 [inline]
 #0: ffff88807fb50450 (sb_writers#8){.+.+}-{0:0}, at: path_openat+0x2929/0x4280 fs/namei.c:4863
 #1: ffff8880701197a0 (&sb->s_type->i_mutex_key#17){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:1029 [inline]
 #1: ffff8880701197a0 (&sb->s_type->i_mutex_key#17){+.+.}-{4:4}, at: do_truncate+0x14e/0x240 fs/open.c:63
 #2: ffff8880701194e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0x9f/0x2f0 fs/ocfs2/refcounttree.c:931

stack backtrace:
CPU: 0 UID: 0 PID: 5647 Comm: syz-executor421 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631
 ocfs2_try_remove_refcount_tree+0xa7/0x2f0 fs/ocfs2/refcounttree.c:932
 ocfs2_truncate_file+0xb57/0x17c0 fs/ocfs2/file.c:527
 ocfs2_setattr+0x14a0/0x2680 fs/ocfs2/file.c:1224
 notify_change+0xb25/0x1330 fs/attr.c:556
 do_truncate+0x1df/0x240 fs/open.c:68
 handle_truncate fs/namei.c:4305 [inline]
 do_open fs/namei.c:4704 [inline]
 path_openat+0x370f/0x4280 fs/namei.c:4863
 do_file_open+0x20e/0x430 fs/namei.c:4892
 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_open fs/open.c:1382 [inline]
 __se_sys_open fs/open.c:1378 [inline]
 __x64_sys_open+0xfe/0x1d0 fs/open.c:1378
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed7a927869
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe660053c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007fed7a927869
RDX: 0000000000000006 RSI: 000000000014927e RDI: 00002000000000c0
RBP: 0000000000000001 R08: 0000555590651570 R09: 0000555590651570
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe660053f0
R13: 0000000000000002 R14: 431bde82d7b634db R15: 00007fed7a98704b
 </TASK>