JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.1663/16699 is trying to acquire lock:
ffff88811b99f6a8 (&dquot->dq_lock){+.+.}-{4:4}, at: dqget+0x72a/0xf10

but task is already holding lock:
ffff88801b8743c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4940

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+0x1539/0x44e0
       evict+0x61e/0xb10
       ocfs2_dentry_iput+0x24d/0x390
       __dentry_kill+0x1a2/0x5e0
       finish_dput+0xc9/0x480
       ovl_fill_super+0x4985/0x5e00
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2a0
       do_new_mount+0x341/0xd30
       __se_sys_mount+0x31d/0x420
       do_syscall_64+0x14d/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+0x1663/0x1ed0
       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+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&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
       ocfs2_setattr+0xe3b/0x1cc0
       notify_change+0xc1a/0xf40
       chown_common+0x466/0x6b0
       ksys_fchown+0xe9/0x160
       __x64_sys_fchown+0x7a/0x90
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&dquot->dq_lock){+.+.}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0xf0/0x2e0
       __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

other info that might help us debug this:

Chain exists of:
  &dquot->dq_lock --> &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]);
  lock(&dquot->dq_lock);

 *** DEADLOCK ***

3 locks held by syz.4.1663/16699:
 #0: ffff88810d464420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88811a3409c0 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: path_openat+0xb4c/0x3860
 #2: ffff88801b8743c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4940

stack backtrace:
CPU: 0 UID: 0 PID: 16699 Comm: syz.4.1663 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
 __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
RIP: 0033:0x7fe20719c799
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:00007fe2053f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fe207415fa0 RCX: 00007fe20719c799
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007fe207232bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe207416038 R14: 00007fe207415fa0 R15: 00007fff174e9b68
 </TASK>
