syzbot

loop0: detected capacity change from 0 to 512
EXT4-fs (loop0): orphan cleanup on readonly fs
------------[ cut here ]------------
EA inode 11 i_nlink=0
WARNING: fs/ext4/xattr.c:1057 at ext4_xattr_inode_update_ref+0x477/0x590 fs/ext4/xattr.c:1057, CPU#1: syz.0.17/5895
Modules linked in:
CPU: 1 UID: 0 PID: 5895 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:ext4_xattr_inode_update_ref+0x47e/0x590 fs/ext4/xattr.c:1057
Code: 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 0a 01 00 00 48 8d 3d 09 17 fb 0d 48 8b 73 40 44 89 e2 <67> 48 0f b9 3a eb a6 e8 86 db 21 ff 48 8d 7b 40 48 b8 00 00 00 00
RSP: 0018:ffffc900037a7170 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff888067a4f2c0 RCX: ffffffff82e78295
RDX: 0000000000000000 RSI: 000000000000000b RDI: ffffffff90e299f0
RBP: ffffc900037a7238 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff920006f4e31 R14: 00000000ffffffff R15: 0000000000000000
FS:  0000555571677500(0000) GS:ffff8881243e7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09a38ae9c0 CR3: 000000006f1d1000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1082 [inline]
 ext4_xattr_set_entry+0x185b/0x20b0 fs/ext4/xattr.c:1726
 ext4_xattr_ibody_set+0x3d3/0x5d0 fs/ext4/xattr.c:2275
 ext4_xattr_move_to_block fs/ext4/xattr.c:2678 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2746 [inline]
 ext4_expand_extra_isize_ea+0x180d/0x1d70 fs/ext4/xattr.c:2834
 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:6486
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6529 [inline]
 __ext4_mark_inode_dirty+0x668/0x880 fs/ext4/inode.c:6607
 ext4_evict_inode+0x835/0x1960 fs/ext4/inode.c:267
 evict+0x3c2/0xad0 fs/inode.c:825
 iput_final fs/inode.c:2019 [inline]
 iput.part.0+0x989/0x1050 fs/inode.c:2068
 iput+0x35/0x40 fs/inode.c:2034
 ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472
 __ext4_fill_super fs/ext4/super.c:5705 [inline]
 ext4_fill_super+0x917f/0xb470 fs/ext4/super.c:5828
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1634
 vfs_get_tree+0x92/0x320 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount fs/namespace.c:3841 [inline]
 path_mount+0x7d0/0x23d0 fs/namespace.c:4161
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount fs/namespace.c:4367 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f0639e0ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffc4c63bad8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc4c63bb60 RCX: 00007f6f0639e0ca
RDX: 0000200000000180 RSI: 0000200000000000 RDI: 00007ffc4c63bb20
RBP: 0000200000000180 R08: 00007ffc4c63bb60 R09: 000000000000001f
R10: 000000000000001f R11: 0000000000000246 R12: 0000200000000000
R13: 00007ffc4c63bb20 R14: 000000000000047a R15: 00002000000001c0
 </TASK>
----------------
Code disassembly (best guess):
   0:	40                   	rex
   1:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   8:	fc ff df
   b:	48 89 fa             	mov    %rdi,%rdx
   e:	48 c1 ea 03          	shr    $0x3,%rdx
  12:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  16:	0f 85 0a 01 00 00    	jne    0x126
  1c:	48 8d 3d 09 17 fb 0d 	lea    0xdfb1709(%rip),%rdi        # 0xdfb172c
  23:	48 8b 73 40          	mov    0x40(%rbx),%rsi
  27:	44 89 e2             	mov    %r12d,%edx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	eb a6                	jmp    0xffffffd7
  31:	e8 86 db 21 ff       	call   0xff21dbbc
  36:	48 8d 7b 40          	lea    0x40(%rbx),%rdi
  3a:	48                   	rex.W
  3b:	b8 00 00 00 00       	mov    $0x0,%eax