ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode.
======================================================
WARNING: possible circular locking dependency detected
6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #0 Not tainted
------------------------------------------------------
syz-executor291/5832 is trying to acquire lock:
ffff888078fadbe0 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xbb/0x350 fs/ocfs2/refcounttree.c:932

but task is already holding lock:
ffff888078fadc78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xaa/0x350 fs/ocfs2/refcounttree.c:931

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_xattr_sem){++++}-{4:4}:
       lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
       down_write+0x9c/0x220 kernel/locking/rwsem.c:1577
       ocfs2_xattr_set_handle+0x53b/0xa20 fs/ocfs2/xattr.c:3501
       ocfs2_init_security_set+0xbd/0xd0 fs/ocfs2/xattr.c:7307
       ocfs2_mknod+0x1cd3/0x2b30 fs/ocfs2/namei.c:419
       ocfs2_create+0x1ad/0x480 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3666 [inline]
       open_last_lookups fs/namei.c:3765 [inline]
       path_openat+0x194b/0x35d0 fs/namei.c:4001
       do_filp_open+0x284/0x4e0 fs/namei.c:4031
       do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_creat fs/open.c:1522 [inline]
       __se_sys_creat fs/open.c:1516 [inline]
       __x64_sys_creat+0x124/0x170 fs/open.c:1516
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (jbd2_handle){.+.+}-{0:0}:
       lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
       start_this_handle+0x1ee4/0x21a0 fs/jbd2/transaction.c:444
       jbd2__journal_start+0x2da/0x5d0 fs/jbd2/transaction.c:501
       jbd2_journal_start+0x29/0x40 fs/jbd2/transaction.c:540
       ocfs2_start_trans+0x3cd/0x710 fs/ocfs2/journal.c:352
       ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline]
       ocfs2_reserve_suballoc_bits+0xa54/0x4f30 fs/ocfs2/suballoc.c:832
       ocfs2_reserve_new_metadata_blocks+0x41c/0x9b0 fs/ocfs2/suballoc.c:982
       ocfs2_mknod+0x143e/0x2b30 fs/ocfs2/namei.c:347
       ocfs2_create+0x1ad/0x480 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3666 [inline]
       open_last_lookups fs/namei.c:3765 [inline]
       path_openat+0x194b/0x35d0 fs/namei.c:4001
       do_filp_open+0x284/0x4e0 fs/namei.c:4031
       do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_creat fs/open.c:1522 [inline]
       __se_sys_creat fs/open.c:1516 [inline]
       __x64_sys_creat+0x124/0x170 fs/open.c:1516
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
       down_read+0xb3/0xa50 kernel/locking/rwsem.c:1524
       ocfs2_start_trans+0x3c2/0x710 fs/ocfs2/journal.c:350
       ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline]
       ocfs2_reserve_suballoc_bits+0xa54/0x4f30 fs/ocfs2/suballoc.c:832
       ocfs2_reserve_new_metadata_blocks+0x41c/0x9b0 fs/ocfs2/suballoc.c:982
       ocfs2_mknod+0x143e/0x2b30 fs/ocfs2/namei.c:347
       ocfs2_create+0x1ad/0x480 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3666 [inline]
       open_last_lookups fs/namei.c:3765 [inline]
       path_openat+0x194b/0x35d0 fs/namei.c:4001
       do_filp_open+0x284/0x4e0 fs/namei.c:4031
       do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_creat fs/open.c:1522 [inline]
       __se_sys_creat fs/open.c:1516 [inline]
       __x64_sys_creat+0x124/0x170 fs/open.c:1516
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#2){.+.+}-{0:0}:
       lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
       percpu_down_read include/linux/percpu-rwsem.h:52 [inline]
       __sb_start_write include/linux/fs.h:1783 [inline]
       sb_start_intwrite include/linux/fs.h:1966 [inline]
       ocfs2_start_trans+0x2bd/0x710 fs/ocfs2/journal.c:348
       ocfs2_orphan_for_truncate fs/ocfs2/file.c:396 [inline]
       ocfs2_truncate_file+0x69c/0x1560 fs/ocfs2/file.c:500
       ocfs2_setattr+0x1894/0x1ef0 fs/ocfs2/file.c:1212
       notify_change+0xbca/0xe90 fs/attr.c:552
       do_truncate+0x222/0x310 fs/open.c:65
       handle_truncate fs/namei.c:3466 [inline]
       do_open fs/namei.c:3849 [inline]
       path_openat+0x2e4f/0x35d0 fs/namei.c:4004
       do_filp_open+0x284/0x4e0 fs/namei.c:4031
       do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_creat fs/open.c:1522 [inline]
       __se_sys_creat fs/open.c:1516 [inline]
       __x64_sys_creat+0x124/0x170 fs/open.c:1516
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_alloc_sem){+.+.}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3166 [inline]
       check_prevs_add kernel/locking/lockdep.c:3285 [inline]
       validate_chain+0xa69/0x24e0 kernel/locking/lockdep.c:3909
       __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235
       lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
       down_write+0x9c/0x220 kernel/locking/rwsem.c:1577
       ocfs2_try_remove_refcount_tree+0xbb/0x350 fs/ocfs2/refcounttree.c:932
       ocfs2_truncate_file+0xe1d/0x1560 fs/ocfs2/file.c:521
       ocfs2_setattr+0x1894/0x1ef0 fs/ocfs2/file.c:1212
       notify_change+0xbca/0xe90 fs/attr.c:552
       do_truncate+0x222/0x310 fs/open.c:65
       handle_truncate fs/namei.c:3466 [inline]
       do_open fs/namei.c:3849 [inline]
       path_openat+0x2e4f/0x35d0 fs/namei.c:4004
       do_filp_open+0x284/0x4e0 fs/namei.c:4031
       do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_creat fs/open.c:1522 [inline]
       __se_sys_creat fs/open.c:1516 [inline]
       __x64_sys_creat+0x124/0x170 fs/open.c:1516
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x230 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 --> jbd2_handle --> &oi->ip_xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_xattr_sem);
                               lock(jbd2_handle);
                               lock(&oi->ip_xattr_sem);
  lock(&oi->ip_alloc_sem);

 *** DEADLOCK ***

3 locks held by syz-executor291/5832:
 #0: ffff888032b32420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:556
 #1: ffff888078fadf40 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #1: ffff888078fadf40 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: do_truncate+0x20e/0x310 fs/open.c:63
 #2: ffff888078fadc78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xaa/0x350 fs/ocfs2/refcounttree.c:931

stack backtrace:
CPU: 1 UID: 0 PID: 5832 Comm: syz-executor291 Not tainted 6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2079
 check_noncircular+0x142/0x160 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+0xa69/0x24e0 kernel/locking/lockdep.c:3909
 __lock_acquire+0xad5/0xd80 kernel/locking/lockdep.c:5235
 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
 down_write+0x9c/0x220 kernel/locking/rwsem.c:1577
 ocfs2_try_remove_refcount_tree+0xbb/0x350 fs/ocfs2/refcounttree.c:932
 ocfs2_truncate_file+0xe1d/0x1560 fs/ocfs2/file.c:521
 ocfs2_setattr+0x1894/0x1ef0 fs/ocfs2/file.c:1212
 notify_change+0xbca/0xe90 fs/attr.c:552
 do_truncate+0x222/0x310 fs/open.c:65
 handle_truncate fs/namei.c:3466 [inline]
 do_open fs/namei.c:3849 [inline]
 path_openat+0x2e4f/0x35d0 fs/namei.c:4004
 do_filp_open+0x284/0x4e0 fs/namei.c:4031
 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_creat fs/open.c:1522 [inline]
 __se_sys_creat fs/open.c:1516 [inline]
 __x64_sys_creat+0x124/0x170 fs/open.c:1516
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce47cfb679
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc2e8b3008 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007fce47cfb679
RDX: 00007fce47cfb679 RSI