======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.646/17827 is trying to acquire lock:
ffff8881244c86f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2f9/0x720

but task is already holding lock:
ffff88811b172950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #5 (jbd2_handle){++++}-{0:0}:
       lock_acquire+0x120/0x360
       start_this_handle+0x1fa7/0x21c0
       jbd2__journal_start+0x2c1/0x5b0
       jbd2_journal_start+0x2a/0x40
       ocfs2_start_trans+0x376/0x6d0
       ocfs2_shutdown_local_alloc+0x200/0xa10
       ocfs2_dismount_volume+0x201/0x8d0
       generic_shutdown_super+0x135/0x2c0
       kill_block_super+0x44/0x90
       deactivate_locked_super+0xbc/0x130
       cleanup_mnt+0x425/0x4c0
       task_work_run+0x1d4/0x260
       exit_to_user_mode_loop+0xec/0x110
       do_syscall_64+0x2bd/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       ocfs2_start_trans+0x36a/0x6d0
       ocfs2_shutdown_local_alloc+0x200/0xa10
       ocfs2_dismount_volume+0x201/0x8d0
       generic_shutdown_super+0x135/0x2c0
       kill_block_super+0x44/0x90
       deactivate_locked_super+0xbc/0x130
       cleanup_mnt+0x425/0x4c0
       task_work_run+0x1d4/0x260
       exit_to_user_mode_loop+0xec/0x110
       do_syscall_64+0x2bd/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (sb_internal#2){.+.+}-{0:0}:
       lock_acquire+0x120/0x360
       ocfs2_start_trans+0x26b/0x6d0
       ocfs2_shutdown_local_alloc+0x200/0xa10
       ocfs2_dismount_volume+0x201/0x8d0
       generic_shutdown_super+0x135/0x2c0
       kill_block_super+0x44/0x90
       deactivate_locked_super+0xbc/0x130
       cleanup_mnt+0x425/0x4c0
       task_work_run+0x1d4/0x260
       exit_to_user_mode_loop+0xec/0x110
       do_syscall_64+0x2bd/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x120/0x360
       down_write+0x96/0x1f0
       ocfs2_reserve_suballoc_bits+0x15e/0x4640
       ocfs2_reserve_clusters_with_limit+0x2fb/0xba0
       ocfs2_reserve_suballoc_bits+0x6eb/0x4640
       ocfs2_reserve_new_metadata_blocks+0x403/0x940
       ocfs2_extend_dir+0xc76/0x4870
       ocfs2_prepare_dir_for_insert+0x2fe8/0x5450
       ocfs2_mknod+0x819/0x2050
       vfs_mknod+0x37f/0x3c0
       do_mknodat+0x385/0x4d0
       __x64_sys_mknod+0x8c/0xa0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x120/0x360
       down_write+0x96/0x1f0
       ocfs2_reserve_suballoc_bits+0x15e/0x4640
       ocfs2_reserve_new_metadata_blocks+0x403/0x940
       ocfs2_init_xattr_set_ctxt+0x307/0x700
       ocfs2_xattr_set+0xb70/0x11f0
       __vfs_setxattr+0x43c/0x480
       __vfs_setxattr_noperm+0x12d/0x660
       vfs_setxattr+0x16b/0x2f0
       ovl_get_workdir+0xc09/0x17c0
       ovl_fill_super+0x1365/0x35b0
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2b0
       do_new_mount+0x2a2/0x9e0
       __se_sys_mount+0x317/0x410
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       ocfs2_init_acl+0x2f9/0x720
       ocfs2_mknod+0x1321/0x2050
       ocfs2_mkdir+0x191/0x440
       vfs_mkdir+0x306/0x510
       do_mkdirat+0x247/0x590
       __x64_sys_mkdirat+0x87/0xa0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> &journal->j_trans_barrier --> jbd2_handle

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(jbd2_handle);
                               lock(&journal->j_trans_barrier);
                               lock(jbd2_handle);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

8 locks held by syz.5.646/17827:
 #0: ffff88811fe36428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881244c89c0 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0
 #2: ffff8880306609c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #3: ffff8881244cd240 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #4: ffff8881244cef40 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #5: ffff88811fe36618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_mknod+0xe93/0x2050
 #6: ffff88810b06c4e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0
 #7: ffff88811b172950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0

stack backtrace:
CPU: 1 UID: 0 PID: 17827 Comm: syz.5.646 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+0x189/0x250
 print_circular_bug+0x2ee/0x310
 check_noncircular+0x134/0x160
 validate_chain+0xb9b/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 down_read+0x46/0x2e0
 ocfs2_init_acl+0x2f9/0x720
 ocfs2_mknod+0x1321/0x2050
 ocfs2_mkdir+0x191/0x440
 vfs_mkdir+0x306/0x510
 do_mkdirat+0x247/0x590
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f891b78d417
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f891c542e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f891c542ef0 RCX: 00007f891b78d417
RDX: 00000000000001ff RSI: 0000200000000680 RDI: 00000000ffffff9c
RBP: 0000200000000080 R08: 0000200000000140 R09: 0000000000000000
R10: 0000200000000080 R11: 0000000000000246 R12: 0000200000000680
R13: 00007f891c542eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
