======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.9.1537/14085 is trying to acquire lock:
ffff888112c24060 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x201/0x290

but task is already holding lock:
ffff888112c243c0 (&ocfs2_sysfile_lock_key[GROUP_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:

-> #3 (&ocfs2_sysfile_lock_key[GROUP_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_lock_global_qf+0x1da/0x290
       ocfs2_acquire_dquot+0x3fa/0xb30
       dqget+0x7b1/0xf10
       dquot_set_dqblk+0x2b/0xfa0
       quota_setquota+0x4e0/0x590
       __se_sys_quotactl+0x2cd/0x9e0
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_reserve_local_alloc_bits+0xb43/0x26f0
       ocfs2_reserve_clusters_with_limit+0x1b9/0xc20
       ocfs2_extend_dir+0x755/0x4a70
       ocfs2_prepare_dir_for_insert+0x34af/0x5370
       ocfs2_mknod+0xa1b/0x2290
       ocfs2_mkdir+0x181/0x490
       vfs_mkdir+0x413/0x630
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#6){.+.+}-{0:0}:
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_setattr+0xcc6/0x1cc0
       notify_change+0xc1a/0xf40
       do_truncate+0x1c2/0x250
       do_ftruncate+0x4db/0x5c0
       __x64_sys_ftruncate+0x92/0xf0
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0xf0/0x2e0
       down_write+0x96/0x200
       ocfs2_lock_global_qf+0x201/0x290
       ocfs2_acquire_dquot+0x3fa/0xb30
       dqget+0x7b1/0xf10
       dquot_set_dqblk+0x2b/0xfa0
       quota_setquota+0x4e0/0x590
       __se_sys_quotactl+0x2cd/0x9e0
       do_syscall_64+0x14d/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 --> &journal->j_trans_barrier --> &ocfs2_sysfile_lock_key[GROUP_QUOTA_SYSTEM_INODE]

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[GROUP_QUOTA_SYSTEM_INODE]);
                               lock(&journal->j_trans_barrier);
                               lock(&ocfs2_sysfile_lock_key[GROUP_QUOTA_SYSTEM_INODE]);
  lock(&ocfs2_quota_ip_alloc_sem_key);

 *** DEADLOCK ***

6 locks held by syz.9.1537/14085:
 #0: ffff88810fd980e0 (&type->s_umount_key#91){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
 #1: ffff8881bb4fb6a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x271/0xb30
 #2: ffff88810fd98610 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_acquire_dquot+0x3d5/0xb30
 #3: ffff88811b04ece8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700
 #4: ffff88816f8c2950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x2054/0x2290
 #5: ffff888112c243c0 (&ocfs2_sysfile_lock_key[GROUP_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1da/0x290

stack backtrace:
CPU: 1 UID: 0 PID: 14085 Comm: syz.9.1537 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_lock_global_qf+0x201/0x290
 ocfs2_acquire_dquot+0x3fa/0xb30
 dqget+0x7b1/0xf10
 dquot_set_dqblk+0x2b/0xfa0
 quota_setquota+0x4e0/0x590
 __se_sys_quotactl+0x2cd/0x9e0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f220ff9acb9
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:00007f2210e2a028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f2210215fa0 RCX: 00007f220ff9acb9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: ffffffff80000801
RBP: 00007f2210008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000140 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2210216038 R14: 00007f2210215fa0 R15: 00007fff47247068
 </TASK>
