evm: overlay not supported
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.6.666/7853 is trying to acquire lock:
ffff8881081d34a8 (&dquot->dq_lock){+.+.}-{4:4}, at: dqget+0x72a/0xf10

but task is already holding lock:
ffff88801e599d78 (&ei->xattr_sem){++++}-{4:4}, at: ext4_setattr+0x855/0x1bc0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #5 (&ei->xattr_sem){++++}-{4:4}:
       lock_acquire+0x11f/0x350
       down_read+0x46/0x2e0
       ext4_setattr+0x855/0x1bc0
       notify_change+0xc1a/0xf40
       chown_common+0x425/0x5f0
       do_fchownat+0x143/0x240
       __x64_sys_chown+0x82/0xa0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (jbd2_handle){++++}-{0:0}:
       lock_acquire+0x11f/0x350
       start_this_handle+0x2074/0x2290
       jbd2__journal_start+0x2c0/0x5b0
       jbd2_journal_start+0x2a/0x40
       ocfs2_start_trans+0x3b7/0x700
       ocfs2_mknod+0xf4e/0x2230
       ocfs2_create+0x1a5/0x460
       path_openat+0x14fd/0x3890
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x1d0
       __x64_sys_creat+0x8f/0xc0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire+0x11f/0x350
       down_read+0x46/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_mknod+0xf4e/0x2230
       ocfs2_create+0x1a5/0x460
       path_openat+0x14fd/0x3890
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x1d0
       __x64_sys_creat+0x8f/0xc0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (sb_internal#3){.+.+}-{0:0}:
       lock_acquire+0x11f/0x350
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_acquire_dquot+0x455/0xb40
       dqget+0x7b1/0xf10
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_mknod+0x87f/0x2230
       ocfs2_mkdir+0x191/0x450
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x24f/0x5a0
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       lock_acquire+0x11f/0x350
       down_write+0x96/0x200
       ocfs2_create_local_dquot+0x1a5/0x1af0
       ocfs2_acquire_dquot+0x826/0xb40
       dqget+0x7b1/0xf10
       __dquot_initialize+0x3ba/0xd30
       ocfs2_get_init_inode+0x147/0x1c0
       ocfs2_mknod+0x87f/0x2230
       ocfs2_mkdir+0x191/0x450
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x24f/0x5a0
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&dquot->dq_lock){+.+.}-{4:4}:
       validate_chain+0xb9a/0x2130
       __lock_acquire+0xab8/0xd20
       lock_acquire+0x11f/0x350
       __mutex_lock+0x19f/0x1300
       dqget+0x72a/0xf10
       dquot_transfer+0x451/0x660
       ext4_setattr+0x865/0x1bc0
       notify_change+0xc1a/0xf40
       ovl_setattr+0x3a3/0x550
       notify_change+0xc1a/0xf40
       chown_common+0x425/0x5f0
       do_fchownat+0x143/0x240
       __x64_sys_lchown+0x85/0xa0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &dquot->dq_lock --> jbd2_handle --> &ei->xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&ei->xattr_sem);
                               lock(jbd2_handle);
                               lock(&ei->xattr_sem);
  lock(&dquot->dq_lock);

 *** DEADLOCK ***

5 locks held by syz.6.666/7853:
 #0: ffff88810c09e420 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888118d5f980 (&ovl_i_mutex_dir_key[depth]){++++}-{4:4}, at: chown_common+0x32c/0x5f0
 #2: ffff888021f68420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #3: ffff88801e59a090 (&type->i_mutex_dir_key#3){++++}-{4:4}, at: ovl_setattr+0x325/0x550
 #4: ffff88801e599d78 (&ei->xattr_sem){++++}-{4:4}, at: ext4_setattr+0x855/0x1bc0

stack backtrace:
CPU: 0 UID: 0 PID: 7853 Comm: syz.6.666 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+0x1a9/0x280
 print_circular_bug+0x2ed/0x300
 check_noncircular+0x134/0x160
 validate_chain+0xb9a/0x2130
 __lock_acquire+0xab8/0xd20
 lock_acquire+0x11f/0x350
 __mutex_lock+0x19f/0x1300
 dqget+0x72a/0xf10
 dquot_transfer+0x451/0x660
 ext4_setattr+0x865/0x1bc0
 notify_change+0xc1a/0xf40
 ovl_setattr+0x3a3/0x550
 notify_change+0xc1a/0xf40
 chown_common+0x425/0x5f0
 do_fchownat+0x143/0x240
 __x64_sys_lchown+0x85/0xa0
 do_syscall_64+0xf0/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f441239acb9
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:00007f44131cd028 EFLAGS: 00000246 ORIG_RAX: 000000000000005e
RAX: ffffffffffffffda RBX: 00007f4412615fa0 RCX: 00007f441239acb9
RDX: 000000000000ee01 RSI: 0000000000000000 RDI: 00002000000006c0
RBP: 00007f4412408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4412616038 R14: 00007f4412615fa0 R15: 00007ffd7f9cdc28
 </TASK>
