======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.193/6702 is trying to acquire lock:
ffff888111008610 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_setattr+0xcc6/0x1cc0

but task is already holding lock:
ffff888011e5cee0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0xcb7/0x1cc0

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_lock_global_qf+0x201/0x290
       ocfs2_acquire_dquot+0x3fa/0xb30
       dqget+0x7b1/0xf10
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_symlink+0xb4c/0x2680
       vfs_symlink+0x195/0x340
       filename_symlinkat+0x1cd/0x410
       __se_sys_symlink+0x4d/0x2b0
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_lock_global_qf+0x1da/0x290
       ocfs2_acquire_dquot+0x3fa/0xb30
       dqget+0x7b1/0xf10
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_symlink+0xb4c/0x2680
       vfs_symlink+0x195/0x340
       filename_symlinkat+0x1cd/0x410
       __se_sys_symlink+0x4d/0x2b0
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_modify_bh+0xe3/0x4d0
       ocfs2_local_read_info+0x1454/0x1810
       dquot_load_quota_sb+0x791/0xbd0
       dquot_load_quota_inode+0x2e1/0x5d0
       ocfs2_enable_quotas+0x1c8/0x4a0
       ocfs2_fill_super+0x5305/0x6900
       get_tree_bdev_flags+0x431/0x4f0
       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

-> #0 (sb_internal#6){.+.+}-{0:0}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0xf0/0x2e0
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_setattr+0xcc6/0x1cc0
       notify_change+0xc1a/0xf40
       do_truncate+0x1c2/0x250
       vfs_truncate+0x4b4/0x540
       do_sys_truncate+0xf3/0x1c0
       __x64_sys_truncate+0x5b/0x70
       do_syscall_64+0x14d/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  sb_internal#6 --> &ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE] --> &ocfs2_quota_ip_alloc_sem_key

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_quota_ip_alloc_sem_key);
                               lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]);
                               lock(&ocfs2_quota_ip_alloc_sem_key);
  rlock(sb_internal#6);

 *** DEADLOCK ***

3 locks held by syz.4.193/6702:
 #0: ffff888111008420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888011e5d240 (&sb->s_type->i_mutex_key#47){+.+.}-{4:4}, at: do_truncate+0x18f/0x250
 #2: ffff888011e5cee0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0xcb7/0x1cc0

stack backtrace:
CPU: 0 UID: 0 PID: 6702 Comm: syz.4.193 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
 ocfs2_start_trans+0x2ac/0x700
 ocfs2_setattr+0xcc6/0x1cc0
 notify_change+0xc1a/0xf40
 do_truncate+0x1c2/0x250
 vfs_truncate+0x4b4/0x540
 do_sys_truncate+0xf3/0x1c0
 __x64_sys_truncate+0x5b/0x70
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea7059acb9
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:00007fea6e7f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007fea70815fa0 RCX: 00007fea7059acb9
RDX: 0000000000000000 RSI: 0000000000008000 RDI: 0000200000000000
RBP: 00007fea70608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea70816038 R14: 00007fea70815fa0 R15: 00007ffe568aa898
 </TASK>
