======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.0.5135/26490 is trying to acquire lock:
ffff8881b8ff89c0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xba7/0x13e0

but task is already holding lock:
ffff888117b4cf78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0

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+0x47/0x2e0
       ocfs2_init_acl+0x2fd/0x7e0
       ocfs2_mknod+0x1423/0x2210
       ocfs2_mkdir+0x181/0x430
       vfs_mkdir+0x511/0x5b0
       do_mkdirat+0x27d/0x4b0
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_mknod+0xf31/0x2210
       ocfs2_mkdir+0x181/0x430
       vfs_mkdir+0x511/0x5b0
       do_mkdirat+0x27d/0x4b0
       __x64_sys_mkdir+0x6c/0x80
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#4){.+.+}-{0:0}:
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_remove_btree_range+0x84c/0x1610
       ocfs2_commit_truncate+0xbb8/0x22f0
       ocfs2_evict_inode+0x1023/0x42e0
       evict+0x61e/0xb10
       ocfs2_dentry_iput+0x24d/0x390
       __dentry_kill+0x209/0x660
       finish_dput+0xc9/0x480
       __fput+0x691/0xa70
       task_work_run+0x1d9/0x270
       do_exit+0x69b/0x2310
       do_group_exit+0x21b/0x2d0
       get_signal+0x1284/0x1330
       arch_do_signal_or_restart+0xbc/0x830
       exit_to_user_mode_loop+0x86/0x480
       do_syscall_64+0x2b7/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x330
       down_write+0x96/0x200
       ocfs2_xattr_set+0xba7/0x13e0
       ocfs2_set_acl+0x701/0x7b0
       ocfs2_iop_set_acl+0x1b1/0x2b0
       vfs_set_acl+0x87d/0xb00
       do_set_acl+0xf5/0x190
       filename_setxattr+0x2fc/0x630
       path_setxattrat+0x3f3/0x430
       __x64_sys_lsetxattr+0xbf/0xe0
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE] --> &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_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]);

 *** DEADLOCK ***

3 locks held by syz.0.5135/26490:
 #0: ffff88801e39e420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888117b4d240 (&type->i_mutex_dir_key#19){++++}-{4:4}, at: vfs_set_acl+0x3cd/0xb00
 #2: ffff888117b4cf78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0

stack backtrace:
CPU: 0 UID: 0 PID: 26490 Comm: syz.0.5135 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+0x15a5/0x2cf0
 lock_acquire+0x106/0x330
 down_write+0x96/0x200
 ocfs2_xattr_set+0xba7/0x13e0
 ocfs2_set_acl+0x701/0x7b0
 ocfs2_iop_set_acl+0x1b1/0x2b0
 vfs_set_acl+0x87d/0xb00
 do_set_acl+0xf5/0x190
 filename_setxattr+0x2fc/0x630
 path_setxattrat+0x3f3/0x430
 __x64_sys_lsetxattr+0xbf/0xe0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f256519acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f25633d5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f2565416090 RCX: 00007f256519acb9
RDX: 0000200000000580 RSI: 00002000000002c0 RDI: 00002000000001c0
RBP: 00007f2565208bf7 R08: 0000000000000002 R09: 0000000000000000
R10: 000000000000002c R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2565416128 R14: 00007f2565416090 R15: 00007ffd008320b8
 </TASK>
