======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.9.243/7604 is trying to acquire lock:
ffff8881095e5df8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_calc_xattr_init+0x20a/0xd90

but task is already holding lock:
ffff8881b56d1840 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_evict_inode+0x1539/0x42e0
       evict+0x61e/0xb10
       vfs_rmdir+0x3f1/0x660
       do_rmdir+0x278/0x470
       __x64_sys_unlinkat+0xc2/0xf0
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_del_inode_from_orphan+0x12e/0x7a0
       ocfs2_dio_end_io+0x543/0x1210
       dio_complete+0x25b/0x790
       __blockdev_direct_IO+0x2cb0/0x32f0
       ocfs2_direct_IO+0x251/0x2c0
       generic_file_direct_write+0x1db/0x3e0
       __generic_file_write_iter+0x11d/0x230
       ocfs2_file_write_iter+0x1663/0x1e20
       iter_file_splice_write+0x99b/0x1100
       direct_splice_actor+0x101/0x160
       splice_direct_to_actor+0x53a/0xc70
       do_splice_direct+0x195/0x290
       do_sendfile+0x535/0x7c0
       __se_sys_sendfile64+0x144/0x1a0
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&oi->ip_alloc_sem){++++}-{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
       vfs_truncate+0x4b4/0x540
       do_sys_truncate+0xf1/0x1c0
       __x64_sys_truncate+0x5b/0x70
       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_calc_xattr_init+0x20a/0xd90
       ocfs2_mknod+0xd07/0x2210
       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

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);
                               lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
                               lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

3 locks held by syz.9.243/7604:
 #0: ffff8881ba94c420 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881095e60c0 (&type->i_mutex_dir_key#18){++++}-{4:4}, at: path_openat+0xb53/0x3e20
 #2: ffff8881b56d1840 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790

stack backtrace:
CPU: 1 UID: 0 PID: 7604 Comm: syz.9.243 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_calc_xattr_init+0x20a/0xd90
 ocfs2_mknod+0xd07/0x2210
 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
RIP: 0033:0x7f04b2b9acb9
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:00007f04b0df6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f04b2e15fa0 RCX: 00007f04b2b9acb9
RDX: 0000000000143142 RSI: 0000200000000400 RDI: ffffffffffffff9c
RBP: 00007f04b2c08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f04b2e16038 R14: 00007f04b2e15fa0 R15: 00007ffee37868a8
 </TASK>
