======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.1179/21309 is trying to acquire lock:
ffff8881bed4ce38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2fd/0x7e0

but task is already holding lock:
ffff8881743ff4e8 (&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_reserve_suballoc_bits+0x7bb/0x4790
       ocfs2_reserve_new_metadata_blocks+0x415/0x9a0
       ocfs2_extend_dir+0xcd3/0x4a20
       ocfs2_prepare_dir_for_insert+0x3452/0x52c0
       ocfs2_mknod+0x823/0x2210
       ocfs2_mkdir+0x181/0x430
       vfs_mkdir+0x413/0x630
       do_mkdirat+0x27d/0x510
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (sb_internal#2){.+.+}-{0:0}:
       lock_release+0x199/0x3a0
       up_write+0x2d/0x410
       ocfs2_free_alloc_context+0x97/0x1a0
       ocfs2_write_begin_nolock+0x40b8/0x4140
       ocfs2_write_begin+0x1c5/0x320
       generic_perform_write+0x2e2/0x8f0
       ocfs2_file_write_iter+0x1663/0x1e20
       do_iter_readv_writev+0x619/0x8c0
       vfs_writev+0x33c/0x990
       __se_sys_pwritev2+0x184/0x2a0
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       down_write+0x96/0x200
       ocfs2_try_remove_refcount_tree+0xb6/0x340
       ocfs2_truncate_file+0xdf3/0x1480
       ocfs2_setattr+0x15e5/0x1c70
       notify_change+0xc1a/0xf40
       do_truncate+0x1c2/0x250
       path_openat+0x2f89/0x3860
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x220
       __x64_sys_creat+0x8f/0xc0
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x330
       down_read+0x47/0x2e0
       ocfs2_init_acl+0x2fd/0x7e0
       ocfs2_mknod+0x1423/0x2210
       ocfs2_create+0x195/0x440
       path_openat+0x1395/0x3860
       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

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> sb_internal#2 --> &journal->j_trans_barrier

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

8 locks held by syz.1.1179/21309:
 #0: ffff88816e722420 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881bed4d100 (&type->i_mutex_dir_key#10){++++}-{4:4}, at: path_openat+0xb4c/0x3860
 #2: ffff88801b5342c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790
 #3: ffff88801b535f40 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790
 #4: ffff88801b536d80 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x11f/0x25e0
 #5: ffff88816e722610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_mknod+0xf31/0x2210
 #6: ffff8881743ff4e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700
 #7: ffff8881ab0e2950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x2054/0x2290

stack backtrace:
CPU: 0 UID: 0 PID: 21309 Comm: syz.1.1179 Not tainted syzkaller #0 PREEMPT(full) 
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_read+0x47/0x2e0
 ocfs2_init_acl+0x2fd/0x7e0
 ocfs2_mknod+0x1423/0x2210
 ocfs2_create+0x195/0x440
 path_openat+0x1395/0x3860
 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
RIP: 0033:0x7f7dae39acb9
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:00007f7daf31e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7dae615fa0 RCX: 00007f7dae39acb9
RDX: 000000000000275a RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007f7dae408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7dae616038 R14: 00007f7dae615fa0 R15: 00007ffc10d20fa8
 </TASK>
(syz.1.1179,21309,0):ocfs2_read_blocks_sync:112 ERROR: status = -12
(syz.1.1179,21309,0):update_backups:196 ERROR: status = -12
ocfs2: Failed to update super blocks on 7,1 during fs resize. This condition is not fatal, but fsck.ocfs2 should be run to fix it
