======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.12/5786 is trying to acquire lock:
ffff88816c5a2640 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_setattr+0x9eb/0x1d10

but task is already holding lock:
ffff888115fa8658 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_setattr+0x9dc/0x1d10

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&oi->ip_alloc_sem){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_try_remove_refcount_tree+0xb6/0x360
       ocfs2_xattr_set+0x639/0x13a0
       ocfs2_set_acl+0x6fd/0x7b0
       ocfs2_iop_set_acl+0x1b1/0x2b0
       vfs_remove_acl+0x55c/0x850
       ovl_workdir_create+0x53a/0x8b0
       ovl_fill_super+0x19ad/0x5d40
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2a0
       do_new_mount+0x319/0xdc0
       __se_sys_mount+0x31d/0x420
       do_syscall_64+0x174/0x580
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x4a/0x330
       ocfs2_init_acl+0x2fd/0x7e0
       ocfs2_mknod+0x166a/0x2240
       ocfs2_mkdir+0x181/0x460
       vfs_mkdir+0x406/0x620
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x174/0x580
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x4a/0x330
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_mknod+0x116a/0x2240
       ocfs2_mkdir+0x181/0x460
       vfs_mkdir+0x406/0x620
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x174/0x580
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (sb_internal#3){.+.+}-{0:0}:
       __lock_acquire+0x1520/0x2cf0
       lock_acquire+0x106/0x350
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_setattr+0x9eb/0x1d10
       notify_change+0xbba/0xea0
       ovl_workdir_create+0x69c/0x8b0
       ovl_fill_super+0x19ad/0x5d40
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2a0
       do_new_mount+0x319/0xdc0
       __se_sys_mount+0x31d/0x420
       do_syscall_64+0x174/0x580
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  sb_internal#3 --> &oi->ip_xattr_sem --> &oi->ip_alloc_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_alloc_sem);
                               lock(&oi->ip_xattr_sem);
                               lock(&oi->ip_alloc_sem);
  rlock(sb_internal#3);

 *** DEADLOCK ***

4 locks held by syz.2.12/5786:
 #0: ffff88811d2b80d8 (&type->s_umount_key#60/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1900
 #1: ffff88816c5a2450 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #2: ffff888115fa89a0 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: ovl_workdir_create+0x63d/0x8b0
 #3: ffff888115fa8658 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_setattr+0x9dc/0x1d10

stack backtrace:
CPU: 0 UID: 0 PID: 5786 Comm: syz.2.12 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+0x1520/0x2cf0
 lock_acquire+0x106/0x350
 ocfs2_start_trans+0x2ac/0x700
 ocfs2_setattr+0x9eb/0x1d10
 notify_change+0xbba/0xea0
 ovl_workdir_create+0x69c/0x8b0
 ovl_fill_super+0x19ad/0x5d40
 get_tree_nodev+0xbb/0x150
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a92b9e019
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:00007f9a9398b028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9a92e25fa0 RCX: 00007f9a92b9e019
RDX: 0000200000000b80 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007f9a92c3500c R08: 0000200000000240 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9a92e26038 R14: 00007f9a92e25fa0 R15: 00007ffcc5e73728
 </TASK>
overlayfs: upper fs does not support tmpfile.
overlayfs: upper fs does not support RENAME_WHITEOUT.
overlayfs: failed to set xattr on upper
overlayfs: ...falling back to redirect_dir=nofollow.
overlayfs: ...falling back to index=off.
overlayfs: ...falling back to uuid=null.
overlayfs: upper fs missing required features.
