ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.2.1273/11624 is trying to acquire lock:
ffff8881bf23d240 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790

but task is already holding lock:
ffff8881a7a1ec78 (&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:

-> #4 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_init_acl+0x2fd/0x7e0
       ocfs2_mknod+0x1423/0x2210
       ocfs2_create+0x195/0x440
       path_openat+0x18dd/0x3e20
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x220
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_mknod+0xf31/0x2210
       ocfs2_create+0x195/0x440
       path_openat+0x18dd/0x3e20
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x220
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (sb_internal#4){.+.+}-{0:0}:
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_mknod+0xf31/0x2210
       ocfs2_create+0x195/0x440
       path_openat+0x18dd/0x3e20
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x220
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_reserve_local_alloc_bits+0x11f/0x2610
       ocfs2_reserve_clusters_with_limit+0x1b9/0xc20
       ocfs2_mknod+0xecf/0x2210
       ocfs2_create+0x195/0x440
       path_openat+0x18dd/0x3e20
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x220
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x330
       down_write+0x96/0x200
       ocfs2_reserve_suballoc_bits+0x16f/0x4790
       ocfs2_reserve_new_metadata_blocks+0x415/0x9a0
       ocfs2_init_xattr_set_ctxt+0x30a/0x710
       ocfs2_xattr_set+0xc42/0x13e0
       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[EXTENT_ALLOC_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[EXTENT_ALLOC_SYSTEM_INODE]);

 *** DEADLOCK ***

3 locks held by syz.2.1273/11624:
 #0: ffff88816e980420 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881a7a1ef40 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: vfs_set_acl+0x3cd/0xb00
 #2: ffff8881a7a1ec78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0

stack backtrace:
CPU: 1 UID: 0 PID: 11624 Comm: syz.2.1273 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_reserve_suballoc_bits+0x16f/0x4790
 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0
 ocfs2_init_xattr_set_ctxt+0x30a/0x710
 ocfs2_xattr_set+0xc42/0x13e0
 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: 0033:0x7f5d8479acb9
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:00007f5d856e8028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f5d84a15fa0 RCX: 00007f5d8479acb9
RDX: 0000200000000580 RSI: 00002000000002c0 RDI: 00002000000001c0
RBP: 00007f5d84808bf7 R08: 0000000000000002 R09: 0000000000000000
R10: 000000000000002c R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5d84a16038 R14: 00007f5d84a15fa0 R15: 00007fff17e92f58
 </TASK>
