BUG: unable to handle page fault for address: ffffff8da676c000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD d97e067 P4D d97e067 PUD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 3 PID: 8106 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:map_id_range_down+0x8f/0x3a0 kernel/user_namespace.c:318
Code: 00 00 48 89 44 24 70 31 c0 e8 bd 1a 04 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 8b 02 00 00 4c 8b 74 24 08 <45> 8b 3e 44 89 3c 24 bf 05 00 00 00 44 89 fe e8 8d 15 04 00 41 83
RSP: 0018:ffffc90003dd7780 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9000389a000
RDX: 0000000000040000 RSI: ffffffff818a7513 RDI: ffffff8da676c000
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100986ec87
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffff8da676c000 R14: ffffff8da676c000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5f1fb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffff8da676c000 CR3: 0000000000d0c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 map_id_down kernel/user_namespace.c:337 [inline]
 make_kuid+0x1f/0x30 kernel/user_namespace.c:414
 i_uid_write include/linux/fs.h:1368 [inline]
 inode_init_always+0x2f6/0xf50 fs/inode.c:174
 alloc_inode+0x7d/0x230 fs/inode.c:268
 iget5_locked fs/inode.c:1235 [inline]
 iget5_locked+0x1c9/0x2c0 fs/inode.c:1228
 ntfs_iget5+0xd2/0x3810 fs/ntfs3/inode.c:532
 ntfs_fill_super+0x37a4/0x4430 fs/ntfs3/super.c:1485
 get_tree_bdev+0x36f/0x610 fs/super.c:1615
 vfs_get_tree+0x8f/0x380 fs/super.c:1780
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x6e1/0x1f10 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf732d579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5f1f400 EFLAGS: 00000292 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000f5f1f460 RCX: 0000000020000040
RDX: 000000002001f800 RSI: 0000000000000002 RDI: 00000000f5f1f4a0
RBP: 00000000f5f1f460 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
CR2: ffffff8da676c000
---[ end trace 0000000000000000 ]---
RIP: 0010:map_id_range_down+0x8f/0x3a0 kernel/user_namespace.c:318
Code: 00 00 48 89 44 24 70 31 c0 e8 bd 1a 04 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 8b 02 00 00 4c 8b 74 24 08 <45> 8b 3e 44 89 3c 24 bf 05 00 00 00 44 89 fe e8 8d 15 04 00 41 83
RSP: 0018:ffffc90003dd7780 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9000389a000
RDX: 0000000000040000 RSI: ffffffff818a7513 RDI: ffffff8da676c000
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100986ec87
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffff8da676c000 R14: ffffff8da676c000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88802c300000(0063) knlGS:00000000f5f1fb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffffff8da676c000 CR3: 0000000000d0c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	48 89 44 24 70       	mov    %rax,0x70(%rsp)
   7:	31 c0                	xor    %eax,%eax
   9:	e8 bd 1a 04 00       	call   0x41acb
   e:	4c 89 f0             	mov    %r14,%rax
  11:	48 c1 e8 03          	shr    $0x3,%rax
  15:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
  19:	84 c0                	test   %al,%al
  1b:	74 08                	je     0x25
  1d:	3c 03                	cmp    $0x3,%al
  1f:	0f 8e 8b 02 00 00    	jle    0x2b0
  25:	4c 8b 74 24 08       	mov    0x8(%rsp),%r14
* 2a:	45 8b 3e             	mov    (%r14),%r15d <-- trapping instruction
  2d:	44 89 3c 24          	mov    %r15d,(%rsp)
  31:	bf 05 00 00 00       	mov    $0x5,%edi
  36:	44 89 fe             	mov    %r15d,%esi
  39:	e8 8d 15 04 00       	call   0x415cb
  3e:	41                   	rex.B
  3f:	83                   	.byte 0x83