======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.94/6216 is trying to acquire lock:
ffff8881ab10f9a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1539/0x43b0

but task is already holding lock:
ffff8881ab1125a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe97/0x43b0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #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+0xf9c/0x1370
       dio_complete+0x25b/0x790
       __blockdev_direct_IO+0x2e5d/0x34e0
       ocfs2_direct_IO+0x251/0x2c0
       generic_file_direct_write+0x1db/0x3e0
       __generic_file_write_iter+0x11d/0x230
       ocfs2_file_write_iter+0x1663/0x1e70
       iter_file_splice_write+0x9a1/0x10f0
       direct_splice_actor+0x101/0x160
       splice_direct_to_actor+0x53a/0xc70
       do_splice_direct+0x195/0x290
       do_sendfile+0x535/0x7d0
       __se_sys_sendfile64+0x144/0x1a0
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_reserve_suballoc_bits+0x16d/0x4840
       ocfs2_reserve_new_metadata_blocks+0x415/0x9a0
       ocfs2_mknod+0x10f3/0x2260
       vfs_mknod+0x447/0x610
       filename_mknodat+0x3cb/0x660
       __se_sys_mknod+0x3a/0x150
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x350
       down_write+0x96/0x200
       ocfs2_evict_inode+0x1539/0x43b0
       evict+0x61e/0xb10
       vfs_rmdir+0x42a/0x6e0
       filename_rmdir+0x292/0x520
       __se_sys_rmdir+0x2e/0x140
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

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

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
                               lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]);
                               lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
  lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);

 *** DEADLOCK ***

4 locks held by syz.0.94/6216:
 #0: ffff8881aaf58410 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881ab1179a0 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520
 #2: ffff8881aaf44bc0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270
 #3: ffff8881ab1125a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe97/0x43b0

stack backtrace:
CPU: 0 UID: 0 PID: 6216 Comm: syz.0.94 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+0x106/0x350
 down_write+0x96/0x200
 ocfs2_evict_inode+0x1539/0x43b0
 evict+0x61e/0xb10
 vfs_rmdir+0x42a/0x6e0
 filename_rmdir+0x292/0x520
 __se_sys_rmdir+0x2e/0x140
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7468d9cdd9
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:00007f7469bff028 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f7469015fa0 RCX: 00007f7468d9cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000400
RBP: 00007f7468e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7469016038 R14: 00007f7469015fa0 R15: 00007ffc77d4cad8
 </TASK>
syz.0.94 (6216) used greatest stack depth: 19048 bytes left
