======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.156/6777 is trying to acquire lock:
ffff888120d31840 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_del_inode_from_orphan+0x12e/0x7a0

but task is already holding lock:
ffff888120cb2360 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x437/0x1210

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       down_write+0x96/0x200
       ocfs2_create_local_dquot+0x1a5/0x1af0
       ocfs2_acquire_dquot+0x816/0xb70
       dqget+0x7b1/0xf10
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_mknod+0xa67/0x2290
       ocfs2_create+0x195/0x490
       path_openat+0x1395/0x3860
       do_file_open+0x23e/0x4a0
       do_sys_openat2+0x113/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&dquot->dq_lock){+.+.}-{4:4}:
       __mutex_lock+0x19f/0x1300
       dqget+0x72a/0xf10
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_mknod+0xa67/0x2290
       ocfs2_create+0x195/0x490
       path_openat+0x1395/0x3860
       do_file_open+0x23e/0x4a0
       do_sys_openat2+0x113/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_evict_inode+0x1539/0x44e0
       evict+0x61e/0xb10
       ocfs2_dentry_iput+0x24d/0x390
       __dentry_kill+0x1a2/0x5e0
       finish_dput+0xc9/0x480
       __fput+0x691/0xa70
       task_work_run+0x1d9/0x270
       exit_to_user_mode_loop+0xed/0x480
       do_syscall_64+0x32d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0xf0/0x2e0
       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+0x1663/0x1ed0
       do_iter_readv_writev+0x619/0x8c0
       vfs_writev+0x33c/0x990
       __se_sys_pwritev2+0x184/0x2a0
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &dquot->dq_lock --> &ocfs2_quota_ip_alloc_sem_key

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_quota_ip_alloc_sem_key);
                               lock(&dquot->dq_lock);
                               lock(&ocfs2_quota_ip_alloc_sem_key);
  lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);

 *** DEADLOCK ***

3 locks held by syz.0.156/6777:
 #0: ffff88811641a420 (sb_writers#16){.+.+}-{0:0}, at: vfs_writev+0x2aa/0x990
 #1: ffff888120cb26c0 (&sb->s_type->i_mutex_key#29){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x429/0x1ed0
 #2: ffff888120cb2360 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x437/0x1210

stack backtrace:
CPU: 0 UID: 0 PID: 6777 Comm: syz.0.156 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+0xf0/0x2e0
 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+0x1663/0x1ed0
 do_iter_readv_writev+0x619/0x8c0
 vfs_writev+0x33c/0x990
 __se_sys_pwritev2+0x184/0x2a0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdcbeb9c799
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:00007fdcbfacd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fdcbee15fa0 RCX: 00007fdcbeb9c799
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000005
RBP: 00007fdcbec32bd9 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdcbee16038 R14: 00007fdcbee15fa0 R15: 00007ffc726e0fc8
 </TASK>
