======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.498/8073 is trying to acquire lock:
ffff88802b993540 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640

but task is already holding lock:
ffff88811ac3c0f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_xattr_sem){++++}-{4:4}:
       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

-> #3 (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

-> #2 (&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

-> #1 (sb_internal#2){.+.+}-{0:0}:
       lock_acquire+0x120/0x360
       ocfs2_start_trans+0x26b/0x6d0
       ocfs2_dio_end_io+0x824/0x10f0
       dio_complete+0x25b/0x790
       __blockdev_direct_IO+0x2e63/0x3490
       ocfs2_direct_IO+0x25f/0x2d0
       generic_file_direct_write+0x1db/0x3e0
       __generic_file_write_iter+0x11d/0x230
       ocfs2_file_write_iter+0x157a/0x1d10
       iter_file_splice_write+0x975/0x10e0
       direct_splice_actor+0x101/0x160
       splice_direct_to_actor+0x5a8/0xcc0
       do_splice_direct+0x181/0x270
       do_sendfile+0x4da/0x7e0
       __se_sys_sendfile64+0x13e/0x190
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       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
       filename_setxattr+0x274/0x600
       path_setxattrat+0x364/0x3a0
       __x64_sys_setxattr+0xbc/0xe0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] --> jbd2_handle --> &oi->ip_xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_xattr_sem);
                               lock(jbd2_handle);
                               lock(&oi->ip_xattr_sem);
  lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]);

 *** DEADLOCK ***

3 locks held by syz.4.498/8073:
 #0: ffff88802a11e428 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88811ac3c3c0 (&sb->s_type->i_mutex_key#28){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0
 #2: ffff88811ac3c0f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0

stack backtrace:
CPU: 1 UID: 0 PID: 8073 Comm: syz.4.498 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_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
 filename_setxattr+0x274/0x600
 path_setxattrat+0x364/0x3a0
 __x64_sys_setxattr+0xbc/0xe0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe2b7b8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe2b8aaa038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fe2b7dc6090 RCX: 00007fe2b7b8ebe9
RDX: 0000200000001040 RSI: 00002000000001c0 RDI: 0000200000000000
RBP: 00007fe2b7c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000841 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe2b7dc6128 R14: 00007fe2b7dc6090 R15: 00007ffd57019a98
 </TASK>
