======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.1120/13647 is trying to acquire lock:
ffff8881b82c7658 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x201/0x290

but task is already holding lock:
ffff8881b82c79a0 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1da/0x290

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_lock_global_qf+0x1da/0x290
       ocfs2_acquire_dquot+0x2a0/0xb40
       dqget+0x73c/0xc50
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_mknod+0xa67/0x2260
       ocfs2_mkdir+0x181/0x460
       vfs_mkdir+0x413/0x630
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&dquot->dq_lock){+.+.}-{4:4}:
       __mutex_lock+0x1a3/0x1550
       dqget+0x6b9/0xc50
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_mknod+0xa67/0x2260
       ocfs2_mkdir+0x181/0x460
       vfs_mkdir+0x413/0x630
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_evict_inode+0x1539/0x43b0
       evict+0x61e/0xb10
       vfs_rmdir+0x42a/0x6e0
       filename_rmdir+0x292/0x520
       __se_sys_unlinkat+0x71/0x1a0
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&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+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
       do_iter_readv_writev+0x619/0x8c0
       vfs_writev+0x33c/0x990
       __se_sys_pwritev2+0x184/0x2a0
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x350
       down_write+0x96/0x200
       ocfs2_lock_global_qf+0x201/0x290
       ocfs2_acquire_dquot+0x2a0/0xb40
       dqget+0x73c/0xc50
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_mknod+0xa67/0x2260
       ocfs2_mkdir+0x181/0x460
       vfs_mkdir+0x413/0x630
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

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

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

5 locks held by syz.1.1120/13647:
 #0: ffff8881a4bba410 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881b82325a0 (&type->i_mutex_dir_key#17/1){+.+.}-{4:4}, at: filename_create+0x200/0x370
 #2: ffff8881b82c25a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16d/0x4840
 #3: ffff8881b82476a0 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x293/0xb40
 #4: ffff8881b82c79a0 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1da/0x290

stack backtrace:
CPU: 1 UID: 0 PID: 13647 Comm: syz.1.1120 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_lock_global_qf+0x201/0x290
 ocfs2_acquire_dquot+0x2a0/0xb40
 dqget+0x73c/0xc50
 __dquot_initialize+0x3ba/0xd30
 ocfs2_get_init_inode+0x147/0x1c0
 ocfs2_mknod+0xa67/0x2260
 ocfs2_mkdir+0x181/0x460
 vfs_mkdir+0x413/0x630
 filename_mkdirat+0x285/0x510
 __se_sys_mkdirat+0x35/0x150
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd12339bc47
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007fd1215f5e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fd1215f5ee0 RCX: 00007fd12339bc47
RDX: 00000000000001ff RSI: 00002000000005c0 RDI: 00000000ffffff9c
RBP: 0000200000000080 R08: 0000200000000140 R09: 0000000000000000
R10: 0000200000000080 R11: 0000000000000246 R12: 00002000000005c0
R13: 00007fd1215f5ea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
(syz.1.1120,13647,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x438, computed 0x1cec3d0f. Applying ECC.
(syz.1.1120,13647,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x438, computed 0x1cec3d0f
(syz.1.1120,13647,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop1): find_tree_dqentry: Can't read quota tree block 4
Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0
(syz.1.1120,13647,1):ocfs2_acquire_dquot:890 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_mknod:318 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_mknod:506 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_mkdir:662 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x438, computed 0x1cec3d0f. Applying ECC.
(syz.1.1120,13647,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x438, computed 0x1cec3d0f
(syz.1.1120,13647,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop1): find_tree_dqentry: Can't read quota tree block 4
Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0
(syz.1.1120,13647,1):ocfs2_acquire_dquot:890 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_mknod:318 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_mknod:506 ERROR: status = -5
(syz.1.1120,13647,1):ocfs2_create:679 ERROR: status = -5
