loop0: detected capacity change from 0 to 32768
JBD2: Ignoring recovery information on journal
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.0.285/7115 is trying to acquire lock:
ffff88805496ea20 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:933

but task is already holding lock:
ffff88805496eab8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0x9f/0x320 fs/ocfs2/refcounttree.c:932

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x9b/0x460 kernel/locking/rwsem.c:1537
       ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367
       ocfs2_mknod+0xd2f/0x2510 fs/ocfs2/namei.c:413
       ocfs2_create+0x17c/0x430 fs/ocfs2/namei.c:676
       lookup_open.isra.0+0x12dc/0x1780 fs/namei.c:4440
       open_last_lookups fs/namei.c:4540 [inline]
       path_openat+0xa95/0x3140 fs/namei.c:4784
       do_filp_open+0x20b/0x470 fs/namei.c:4814
       do_sys_openat2+0x11f/0x280 fs/open.c:1430
       do_sys_open fs/open.c:1436 [inline]
       __do_sys_openat fs/open.c:1452 [inline]
       __se_sys_openat fs/open.c:1447 [inline]
       __x64_sys_openat+0x174/0x210 fs/open.c:1447
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x9b/0x460 kernel/locking/rwsem.c:1537
       ocfs2_start_trans+0x3ae/0x970 fs/ocfs2/journal.c:372
       ocfs2_fileattr_set+0x375/0x750 fs/ocfs2/ioctl.c:119
       vfs_fileattr_set+0x77c/0xb80 fs/file_attr.c:298
       ioctl_setflags+0x1c7/0x200 fs/file_attr.c:333
       do_vfs_ioctl+0x120/0x14f0 fs/ioctl.c:560
       __do_sys_ioctl fs/ioctl.c:595 [inline]
       __se_sys_ioctl fs/ioctl.c:583 [inline]
       __x64_sys_ioctl+0x114/0x210 fs/ioctl.c:583
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#2){.+.+}-{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/super.h:19 [inline]
       sb_start_intwrite include/linux/fs/super.h:177 [inline]
       ocfs2_start_trans+0x29d/0x970 fs/ocfs2/journal.c:370
       ocfs2_write_begin_inline fs/ocfs2/aops.c:1459 [inline]
       ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1563 [inline]
       ocfs2_write_begin_nolock+0x15b9/0x69e0 fs/ocfs2/aops.c:1649
       ocfs2_write_begin+0x1cb/0x340 fs/ocfs2/aops.c:1884
       generic_perform_write+0x3c4/0x900 mm/filemap.c:4314
       __generic_file_write_iter+0x1f7/0x240 mm/filemap.c:4431
       ocfs2_file_write_iter+0xb97/0x2190 fs/ocfs2/file.c:2469
       new_sync_write fs/read_write.c:593 [inline]
       vfs_write+0x7d3/0x11d0 fs/read_write.c:686
       ksys_write+0x12a/0x250 fs/read_write.c:738
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
       down_write+0x92/0x200 kernel/locking/rwsem.c:1590
       ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:933
       ocfs2_truncate_file+0xb8d/0x1770 fs/ocfs2/file.c:521
       ocfs2_setattr+0x158b/0x2560 fs/ocfs2/file.c:1212
       notify_change+0x6d2/0x1290 fs/attr.c:546
       do_truncate+0x1d7/0x230 fs/open.c:68
       handle_truncate fs/namei.c:4235 [inline]
       do_open fs/namei.c:4632 [inline]
       path_openat+0x2a1a/0x3140 fs/namei.c:4787
       do_filp_open+0x20b/0x470 fs/namei.c:4814
       do_sys_openat2+0x11f/0x280 fs/open.c:1430
       do_sys_open fs/open.c:1436 [inline]
       __do_sys_openat fs/open.c:1452 [inline]
       __se_sys_openat fs/open.c:1447 [inline]
       __x64_sys_openat+0x174/0x210 fs/open.c:1447
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xf80 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_file_ip_alloc_sem_key --> &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(&ocfs2_file_ip_alloc_sem_key);

 *** DEADLOCK ***

3 locks held by syz.0.285/7115:
 #0: ffff888033d78420 (sb_writers#12){.+.+}-{0:0}, at: do_open fs/namei.c:4621 [inline]
 #0: ffff888033d78420 (sb_writers#12){.+.+}-{0:0}, at: path_openat+0x25bd/0x3140 fs/namei.c:4787
 #1: ffff88805496ed80 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:1032 [inline]
 #1: ffff88805496ed80 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: do_truncate+0x146/0x230 fs/open.c:63
 #2: ffff88805496eab8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0x9f/0x320 fs/ocfs2/refcounttree.c:932

stack backtrace:
CPU: 0 UID: 0 PID: 7115 Comm: syz.0.285 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_circular_bug+0x275/0x340 kernel/locking/lockdep.c:2043
 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
 down_write+0x92/0x200 kernel/locking/rwsem.c:1590
 ocfs2_try_remove_refcount_tree+0xa7/0x320 fs/ocfs2/refcounttree.c:933
 ocfs2_truncate_file+0xb8d/0x1770 fs/ocfs2/file.c:521
 ocfs2_setattr+0x158b/0x2560 fs/ocfs2/file.c:1212
 notify_change+0x6d2/0x1290 fs/attr.c:546
 do_truncate+0x1d7/0x230 fs/open.c:68
 handle_truncate fs/namei.c:4235 [inline]
 do_open fs/namei.c:4632 [inline]
 path_openat+0x2a1a/0x3140 fs/namei.c:4787
 do_filp_open+0x20b/0x470 fs/namei.c:4814
 do_sys_openat2+0x11f/0x280 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faa7018f749
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:00007faa70f80038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007faa703e5fa0 RCX: 00007faa7018f749
RDX: 000000000000275a RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007faa70213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faa703e6038 R14: 00007faa703e5fa0 R15: 00007fff403b6e38
 </TASK>