JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,7) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.7.2006/24901 is trying to acquire lock:
ffff8881b563c060 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xb6/0x340

but task is already holding lock:
ffff8881b563c0f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x340

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       lock_acquire+0x11f/0x350
       down_read+0x46/0x2e0
       ocfs2_init_acl+0x309/0x780
       ocfs2_mknod+0x1440/0x2230
       ocfs2_mkdir+0x191/0x450
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x24f/0x5a0
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (jbd2_handle){++++}-{0:0}:
       lock_acquire+0x11f/0x350
       jbd2_journal_lock_updates+0xab/0x370
       __ocfs2_flush_truncate_log+0x2be/0x1150
       ocfs2_flush_truncate_log+0x4f/0x70
       ocfs2_sync_fs+0x11c/0x340
       sync_filesystem+0x1cf/0x230
       generic_shutdown_super+0x6f/0x2c0
       kill_block_super+0x44/0x90
       deactivate_locked_super+0xbc/0x130
       cleanup_mnt+0x437/0x4d0
       task_work_run+0x1d9/0x270
       exit_to_user_mode_loop+0xe7/0x120
       do_syscall_64+0x2b3/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x11f/0x350
       down_write+0x96/0x200
       ocfs2_remove_btree_range+0x679/0x1610
       ocfs2_remove_inode_range+0xf77/0x2630
       __ocfs2_change_file_space+0x837/0xee0
       ocfs2_fallocate+0x1f5/0x240
       vfs_fallocate+0x669/0x7e0
       file_ioctl+0x63f/0x860
       do_vfs_ioctl+0xc26/0x1530
       __se_sys_ioctl+0x82/0x170
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       validate_chain+0xb9a/0x2130
       __lock_acquire+0xab8/0xd20
       lock_acquire+0x11f/0x350
       down_write+0x96/0x200
       ocfs2_try_remove_refcount_tree+0xb6/0x340
       ocfs2_truncate_file+0xe04/0x14d0
       ocfs2_setattr+0x15a0/0x1be0
       notify_change+0xc1a/0xf40
       do_truncate+0x1c2/0x250
       path_openat+0x30c2/0x3890
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x1d0
       __x64_sys_open+0x11e/0x150
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_file_ip_alloc_sem_key --> jbd2_handle --> &oi->ip_xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_xattr_sem);
                               lock(jbd2_handle);
                               lock(&oi->ip_xattr_sem);
  lock(&ocfs2_file_ip_alloc_sem_key);

 *** DEADLOCK ***

3 locks held by syz.7.2006/24901:
 #0: ffff8881756ea420 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881b563c3c0 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: do_truncate+0x18f/0x250
 #2: ffff8881b563c0f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x340

stack backtrace:
CPU: 1 UID: 0 PID: 24901 Comm: syz.7.2006 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+0x1a9/0x280
 print_circular_bug+0x2ed/0x300
 check_noncircular+0x134/0x160
 validate_chain+0xb9a/0x2130
 __lock_acquire+0xab8/0xd20
 lock_acquire+0x11f/0x350
 down_write+0x96/0x200
 ocfs2_try_remove_refcount_tree+0xb6/0x340
 ocfs2_truncate_file+0xe04/0x14d0
 ocfs2_setattr+0x15a0/0x1be0
 notify_change+0xc1a/0xf40
 do_truncate+0x1c2/0x250
 path_openat+0x30c2/0x3890
 do_filp_open+0x22d/0x490
 do_sys_openat2+0x12f/0x1d0
 __x64_sys_open+0x11e/0x150
 do_syscall_64+0xf0/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f510579acb9
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:00007f51065a8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f5105a15fa0 RCX: 00007f510579acb9
RDX: 0000000000000000 RSI: 0000000000048a02 RDI: 00002000000003c0
RBP: 00007f5105808bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5105a16038 R14: 00007f5105a15fa0 R15: 00007fffa64183f8
 </TASK>
/dev/loop7: Can't open blockdev
(syz.7.2006,24901,0):ocfs2_check_dir_entry:325 ERROR: bad entry in directory #17: rec_len % 4 != 0 - offset=312, inode=13845347915746889, rec_len=20946, name_len=138
