loop0: detected capacity change from 0 to 32768
ocfs2: Slot 0 on device (7,0) was already allocated to this node!
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 Not tainted
------------------------------------------------------
syz.0.0/5324 is trying to acquire lock:
ffff88805378a610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_write_begin_inline fs/ocfs2/aops.c:1458 [inline]
ffff88805378a610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1562 [inline]
ffff88805378a610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_write_begin_nolock+0x22a3/0x4e80 fs/ocfs2/aops.c:1648

but task is already holding lock:
ffff888045d3cda0 (&oi->ip_alloc_sem){++++}-{4:4}, at: ocfs2_write_begin+0x1d3/0x3a0 fs/ocfs2/aops.c:1880

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_alloc_sem){++++}-{4:4}:
       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_xattr_set+0xa51/0x1940 fs/ocfs2/xattr.c:3669
       ocfs2_set_acl+0x4dd/0x590 fs/ocfs2/acl.c:254
       ocfs2_iop_set_acl+0x24c/0x3c0 fs/ocfs2/acl.c:286
       set_posix_acl fs/posix_acl.c:954 [inline]
       vfs_set_acl+0x806/0xa70 fs/posix_acl.c:1133
       do_setxattr fs/xattr.c:633 [inline]
       filename_setxattr+0x355/0x480 fs/xattr.c:665
       path_setxattrat+0x3f7/0x4c0 fs/xattr.c:713
       __do_sys_lsetxattr fs/xattr.c:754 [inline]
       __se_sys_lsetxattr fs/xattr.c:750 [inline]
       __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
       down_read+0xb3/0xa50 kernel/locking/rwsem.c:1524
       ocfs2_init_acl+0x39d/0x960 fs/ocfs2/acl.c:366
       ocfs2_mknod+0x1c09/0x2b30 fs/ocfs2/namei.c:410
       ocfs2_create+0x1ad/0x480 fs/ocfs2/namei.c:673
       lookup_open fs/namei.c:3701 [inline]
       open_last_lookups fs/namei.c:3800 [inline]
       path_openat+0x194b/0x35d0 fs/namei.c:4036
       do_filp_open+0x284/0x4e0 fs/namei.c:4066
       do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
       do_sys_open fs/open.c:1444 [inline]
       __do_sys_openat fs/open.c:1460 [inline]
       __se_sys_openat fs/open.c:1455 [inline]
       __x64_sys_openat+0x249/0x2a0 fs/open.c:1455
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (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_local_alloc_slide_window fs/ocfs2/localalloc.c:1254 [inline]
       ocfs2_reserve_local_alloc_bits+0xb97/0x2800 fs/ocfs2/localalloc.c:669
       ocfs2_reserve_clusters_with_limit+0x1ba/0xb60 fs/ocfs2/suballoc.c:1166
       ocfs2_symlink+0x13ad/0x2d80 fs/ocfs2/namei.c:1920
       vfs_symlink+0x137/0x2e0 fs/namei.c:4723
       do_symlinkat+0x228/0x3d0 fs/namei.c:4749
       __do_sys_symlink fs/namei.c:4770 [inline]
       __se_sys_symlink fs/namei.c:4768 [inline]
       __x64_sys_symlink+0x7a/0x90 fs/namei.c:4768
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&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_local_alloc_slide_window fs/ocfs2/localalloc.c:1254 [inline]
       ocfs2_reserve_local_alloc_bits+0xb97/0x2800 fs/ocfs2/localalloc.c:669
       ocfs2_reserve_clusters_with_limit+0x1ba/0xb60 fs/ocfs2/suballoc.c:1166
       ocfs2_symlink+0x13ad/0x2d80 fs/ocfs2/namei.c:1920
       vfs_symlink+0x137/0x2e0 fs/namei.c:4723
       do_symlinkat+0x228/0x3d0 fs/namei.c:4749
       __do_sys_symlink fs/namei.c:4770 [inline]
       __se_sys_symlink fs/namei.c:4768 [inline]
       __x64_sys_symlink+0x7a/0x90 fs/namei.c:4768
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (sb_internal#2){.+.+}-{0:0}:
       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
       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_write_begin_inline fs/ocfs2/aops.c:1458 [inline]
       ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1562 [inline]
       ocfs2_write_begin_nolock+0x22a3/0x4e80 fs/ocfs2/aops.c:1648
       ocfs2_write_begin+0x207/0x3a0 fs/ocfs2/aops.c:1882
       generic_perform_write+0x329/0xa10 mm/filemap.c:4103
       ocfs2_file_write_iter+0x190f/0x20d0 fs/ocfs2/file.c:2469
       new_sync_write fs/read_write.c:591 [inline]
       vfs_write+0x70f/0xd10 fs/read_write.c:684
       ksys_write+0x19d/0x2d0 fs/read_write.c:736
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xf3/0x210 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:
  sb_internal#2 --> &oi->ip_xattr_sem --> &oi->ip_alloc_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_alloc_sem);
                               lock(&oi->ip_xattr_sem);
                               lock(&oi->ip_alloc_sem);
  rlock(sb_internal#2);

 *** DEADLOCK ***

4 locks held by syz.0.0/5324:
 #0: ffff8880349df638 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x310 fs/file.c:1213
 #1: ffff88805378a420 (sb_writers#12){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3041 [inline]
 #1: ffff88805378a420 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x23f/0xd10 fs/read_write.c:680
 #2: ffff888045d3d100 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #2: ffff888045d3d100 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x43c/0x20d0 fs/ocfs2/file.c:2399
 #3: ffff888045d3cda0 (&oi->ip_alloc_sem){++++}-{4:4}, at: ocfs2_write_begin+0x1d3/0x3a0 fs/ocfs2/aops.c:1880

stack backtrace:
CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
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
 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_write_begin_inline fs/ocfs2/aops.c:1458 [inline]
 ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1562 [inline]
 ocfs2_write_begin_nolock+0x22a3/0x4e80 fs/ocfs2/aops.c:1648
 ocfs2_write_begin+0x207/0x3a0 fs/ocfs2/aops.c:1882
 generic_perform_write+0x329/0xa10 mm/filemap.c:4103
 ocfs2_file_write_iter+0x190f/0x20d0 fs/ocfs2/file.c:2469
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x70f/0xd10 fs/read_write.c:684
 ksys_write+0x19d/0x2d0 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fedaad8e169
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:00007fedabc5f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fedaafb5fa0 RCX: 00007fedaad8e169
RDX: 0000000000000018 RSI: 0000200000000480 RDI: 0000000000000004
RBP: 00007fedaae10a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fedaafb5fa0 R15: 00007ffcc95000f8
 </TASK>