======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.8.751/11651 is trying to acquire lock:
ffff8881be4febe0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xb6/0x320

but task is already holding lock:
ffff8881be4fec78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x320

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+0x2f7/0x7a0
       ocfs2_mknod+0x12ff/0x2030
       ocfs2_create+0x195/0x420
       path_openat+0x18bb/0x3dd0
       do_filp_open+0x1fa/0x410
       do_sys_openat2+0x121/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xec/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x36a/0x6d0
       ocfs2_modify_bh+0xe8/0x470
       ocfs2_local_read_info+0x1465/0x17e0
       dquot_load_quota_sb+0x791/0xbd0
       dquot_load_quota_inode+0x2e1/0x5d0
       ocfs2_enable_quotas+0x1c6/0x450
       ocfs2_fill_super+0x50dd/0x63a0
       get_tree_bdev_flags+0x40e/0x4d0
       vfs_get_tree+0x92/0x2a0
       do_new_mount+0x302/0xa10
       __se_sys_mount+0x313/0x410
       do_syscall_64+0xec/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#2){.+.+}-{0:0}:
       lock_release+0x19a/0x3b0
       up_write+0x2d/0x410
       ocfs2_free_alloc_context+0x97/0x1a0
       ocfs2_write_begin_nolock+0x4259/0x4300
       ocfs2_dio_wr_get_block+0xb6f/0x1770
       __blockdev_direct_IO+0x16ff/0x3490
       ocfs2_direct_IO+0x25f/0x2d0
       generic_file_direct_write+0x1db/0x3e0
       __generic_file_write_iter+0x11d/0x230
       ocfs2_file_write_iter+0x1582/0x1cf0
       do_iter_readv_writev+0x623/0x8c0
       vfs_writev+0x31a/0x960
       __se_sys_pwritev2+0x179/0x290
       do_syscall_64+0xec/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       __lock_acquire+0x15a6/0x2cf0
       lock_acquire+0x107/0x340
       down_write+0x96/0x1f0
       ocfs2_try_remove_refcount_tree+0xb6/0x320
       ocfs2_truncate_file+0xd92/0x13e0
       ocfs2_setattr+0x155e/0x1bb0
       notify_change+0xc1a/0xf40
       do_truncate+0x1a4/0x220
       path_openat+0x359d/0x3dd0
       do_filp_open+0x1fa/0x410
       do_sys_openat2+0x121/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xec/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_file_ip_alloc_sem_key --> &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_file_ip_alloc_sem_key);

 *** DEADLOCK ***

3 locks held by syz.8.751/11651:
 #0: ffff888116b4c420 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881be4fef40 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: do_truncate+0x171/0x220
 #2: ffff8881be4fec78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x320

stack backtrace:
CPU: 0 UID: 0 PID: 11651 Comm: syz.8.751 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+0x2e2/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x15a6/0x2cf0
 lock_acquire+0x107/0x340
 down_write+0x96/0x1f0
 ocfs2_try_remove_refcount_tree+0xb6/0x320
 ocfs2_truncate_file+0xd92/0x13e0
 ocfs2_setattr+0x155e/0x1bb0
 notify_change+0xc1a/0xf40
 do_truncate+0x1a4/0x220
 path_openat+0x359d/0x3dd0
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0fa9b8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0faa96c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f0fa9de5fa0 RCX: 00007f0fa9b8f7c9
RDX: 000000000000275a RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007f0fa9bf297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0fa9de6038 R14: 00007f0fa9de5fa0 R15: 00007ffd7a6603d8
 </TASK>
OCFS2: ERROR (device loop8): int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *, handle_t *, u32, u32, struct ocfs2_suballoc_result *): Chain allocator dinode 23 has 4294967295 used bits but only 16777215 total
On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted.
OCFS2: File system is now read-only.
(syz.8.751,11651,0):ocfs2_claim_suballoc_bits:2074 ERROR: status = -30
(syz.8.751,11651,0):__ocfs2_claim_clusters:2449 ERROR: status = -30
(syz.8.751,11651,0):__ocfs2_claim_clusters:2457 ERROR: status = -30
(syz.8.751,11651,0):ocfs2_add_clusters_in_btree:4838 ERROR: status = -30
(syz.8.751,11651,0):ocfs2_write_cluster:1132 ERROR: status = -30
(syz.8.751,11651,0):ocfs2_write_cluster_by_desc:1226 ERROR: status = -30
(syz.8.751,11651,0):ocfs2_write_begin_nolock:1799 ERROR: status = -30
(syz.8.751,11651,0):ocfs2_write_begin:1887 ERROR: status = -30
