ocfs2: Mounting device (7,9) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.9.2690/20537 is trying to acquire lock:
ffff88801eb83ee8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2fd/0x7e0

but task is already holding lock:
ffff88802c6f88e0 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_mknod+0x116a/0x2240
       ocfs2_create+0x195/0x460
       path_openat+0x17ba/0x3890
       do_file_open+0x23e/0x4a0
       do_sys_openat2+0x113/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0x174/0x580
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (sb_internal#7){.+.+}-{0:0}:
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_truncate_file+0x663/0x1530
       ocfs2_setattr+0x1641/0x1d10
       notify_change+0xbba/0xea0
       do_truncate+0x1c2/0x250
       vfs_coredump+0x37c2/0x4510
       get_signal+0x1094/0x12c0
       arch_do_signal_or_restart+0xbb/0x860
       irqentry_exit+0x2aa/0x8e0
       asm_exc_page_fault+0x26/0x30

-> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       down_write+0x96/0x200
       ocfs2_try_remove_refcount_tree+0xb6/0x360
       ocfs2_truncate_file+0xe25/0x1530
       ocfs2_setattr+0x1641/0x1d10
       notify_change+0xbba/0xea0
       do_truncate+0x1c2/0x250
       vfs_coredump+0x37c2/0x4510
       get_signal+0x1094/0x12c0
       arch_do_signal_or_restart+0xbb/0x860
       irqentry_exit+0x2aa/0x8e0
       asm_exc_page_fault+0x26/0x30

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       __lock_acquire+0x1520/0x2cd0
       lock_acquire+0x106/0x350
       down_read+0x47/0x2e0
       ocfs2_init_acl+0x2fd/0x7e0
       ocfs2_mknod+0x166a/0x2240
       ocfs2_mkdir+0x181/0x460
       vfs_mkdir+0x406/0x620
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x174/0x580
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> sb_internal#7 --> &journal->j_trans_barrier

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&journal->j_trans_barrier);
                               lock(sb_internal#7);
                               lock(&journal->j_trans_barrier);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

8 locks held by syz.9.2690/20537:
 #0: ffff88803ab42410 (sb_writers#37){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88801eb841a0 (&type->i_mutex_dir_key#21/1){+.+.}-{4:4}, at: filename_create+0x200/0x370
 #2: ffff88801e87dda0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x170/0x4850
 #3: ffff88801e87eba0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x170/0x4850
 #4: ffff88801e87b3a0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x11f/0x2680
 #5: ffff88803ab42600 (sb_internal#7){.+.+}-{0:0}, at: ocfs2_mknod+0x116a/0x2240
 #6: ffff88802c6f88e0 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700
 #7: ffff888033a22938 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1fc3/0x2210

stack backtrace:
CPU: 0 UID: 0 PID: 20537 Comm: syz.9.2690 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_circular_bug+0x2e1/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x1520/0x2cd0
 lock_acquire+0x106/0x350
 down_read+0x47/0x2e0
 ocfs2_init_acl+0x2fd/0x7e0
 ocfs2_mknod+0x166a/0x2240
 ocfs2_mkdir+0x181/0x460
 vfs_mkdir+0x406/0x620
 filename_mkdirat+0x285/0x510
 __se_sys_mkdirat+0x35/0x150
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd93479bcc7
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd9355fbe58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fd9355fbee0 RCX: 00007fd93479bcc7
RDX: 00000000000001ff RSI: 0000200000000300 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000200000000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000300
R13: 00007fd9355fbea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
