loop6: detected capacity change from 0 to 32768
ocfs2: Mounting device (7,6) on (node local, slot 0) with writeback data mode.
======================================================
WARNING: possible circular locking dependency detected
6.6.93-syzkaller #0 Not tainted
------------------------------------------------------
syz.6.1314/9475 is trying to acquire lock:
ffff888059653ff8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_init_acl+0x2fa/0x720 fs/ocfs2/acl.c:366

but task is already holding lock:
ffff88807e918990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e7d/0x20c0 fs/jbd2/transaction.c:448

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (jbd2_handle){++++}-{0:0}:
       jbd2_journal_lock_updates+0xab/0x380 fs/jbd2/transaction.c:865
       __ocfs2_flush_truncate_log+0x2b8/0x10b0 fs/ocfs2/alloc.c:6030
       ocfs2_flush_truncate_log+0x4f/0x60 fs/ocfs2/alloc.c:6077
       ocfs2_sync_fs+0x117/0x310 fs/ocfs2/super.c:402
       sync_filesystem+0x1c2/0x220 fs/sync.c:66
       generic_shutdown_super+0x6f/0x2b0 fs/super.c:666
       kill_block_super+0x44/0x90 fs/super.c:1660
       deactivate_locked_super+0x97/0x100 fs/super.c:481
       cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250
       task_work_run+0x1ce/0x250 kernel/task_work.c:239
       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+0xb1/0x140 kernel/entry/common.c:210
       __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
       syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
       do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}:
       down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:804 [inline]
       ocfs2_xattr_set+0xada/0x11f0 fs/ocfs2/xattr.c:3622
       __vfs_setxattr+0x431/0x470 fs/xattr.c:201
       __vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235
       vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322
       do_setxattr fs/xattr.c:630 [inline]
       path_setxattr+0x362/0x550 fs/xattr.c:659
       __do_sys_lsetxattr fs/xattr.c:684 [inline]
       __se_sys_lsetxattr fs/xattr.c:680 [inline]
       __x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:680
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #0 (&oi->ip_xattr_sem){++++}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
       lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
       ocfs2_init_acl+0x2fa/0x720 fs/ocfs2/acl.c:366
       ocfs2_mknod+0x12e5/0x20f0 fs/ocfs2/namei.c:410
       ocfs2_mkdir+0x196/0x410 fs/ocfs2/namei.c:657
       vfs_mkdir+0x296/0x440 fs/namei.c:4113
       do_mkdirat+0x1d4/0x440 fs/namei.c:4136
       __do_sys_mkdirat fs/namei.c:4151 [inline]
       __se_sys_mkdirat fs/namei.c:4149 [inline]
       __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2 --> jbd2_handle

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(jbd2_handle);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
                               lock(jbd2_handle);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

8 locks held by syz.6.1314/9475:
 #0: ffff88806bfd6418 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:403
 #1: ffff8880596542d8 (&type->i_mutex_dir_key#20/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
 #1: ffff8880596542d8 (&type->i_mutex_dir_key#20/1){+.+.}-{3:3}, at: filename_create+0x1f6/0x460 fs/namei.c:3882
 #2: ffff8880597aed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #2: ffff8880597aed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x165/0x4360 fs/ocfs2/suballoc.c:782
 #3: ffff8880597adf58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #3: ffff8880597adf58 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x165/0x4360 fs/ocfs2/suballoc.c:782
 #4: ffff8880597b1818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #4: ffff8880597b1818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0x126/0x24b0 fs/ocfs2/localalloc.c:635
 #5: ffff88806bfd6608 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xe47/0x20f0 fs/ocfs2/namei.c:361
 #6: ffff88805e0684e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x36a/0x6c0 fs/ocfs2/journal.c:372
 #7: ffff88807e918990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1e7d/0x20c0 fs/jbd2/transaction.c:448

stack backtrace:
CPU: 0 PID: 9475 Comm: syz.6.1314 Not tainted 6.6.93-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
 ocfs2_init_acl+0x2fa/0x720 fs/ocfs2/acl.c:366
 ocfs2_mknod+0x12e5/0x20f0 fs/ocfs2/namei.c:410
 ocfs2_mkdir+0x196/0x410 fs/ocfs2/namei.c:657
 vfs_mkdir+0x296/0x440 fs/namei.c:4113
 do_mkdirat+0x1d4/0x440 fs/namei.c:4136
 __do_sys_mkdirat fs/namei.c:4151 [inline]
 __se_sys_mkdirat fs/namei.c:4149 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb88518d197
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007fb884ffee68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fb884ffeef0 RCX: 00007fb88518d197
RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c
RBP: 00002000000002c0 R08: 00002000000001c0 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000040
R13: 00007fb884ffeeb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
(syz.6.1314,9475,1):ocfs2_remount:623 ERROR: Cannot change heartbeat mode on remount