------------[ cut here ]------------
WARNING: CPU: 1 PID: 1491 at mm/userfaultfd.c:1706 move_pages+0x438/0xff0 mm/userfaultfd.c:1706
Modules linked in:
CPU: 1 PID: 1491 Comm: syz-executor.3 Not tainted 6.8.0-rc4-next-20240212-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:move_pages+0x438/0xff0 mm/userfaultfd.c:1706
Code: 0b 90 e9 d2 fe ff ff 90 0f 0b 90 31 ff 4c 89 e6 e8 6d 72 90 ff 4d 85 e4 74 2b e8 83 6d 90 ff e9 ba fd ff ff e8 79 6d 90 ff 90 <0f> 0b 90 45 31 e4 e9 a9 fd ff ff e8 68 6d 90 ff 45 31 e4 45 31 ff
RSP: 0018:ffffc90003f27640 EFLAGS: 00010283
RAX: ffffffff82036f37 RBX: 1ffff920007e4edc RCX: 0000000000040000
RDX: ffffc90005361000 RSI: 000000000000150a RDI: 000000000000150b
RBP: ffffc90003f27770 R08: ffffffff82036e0e R09: 1ffffffff1f0cfa5
R10: dffffc0000000000 R11: fffffbfff1f0cfa6 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888029a86808 R15: 0000000000000000
FS:  00007fb39c0976c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6eaa891001 CR3: 00000000a71ea000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 userfaultfd_move fs/userfaultfd.c:2008 [inline]
 userfaultfd_ioctl+0x5c10/0x72c0 fs/userfaultfd.c:2126
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:857
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fb39b27dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb39c0970c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb39b3abf80 RCX: 00007fb39b27dda9
RDX: 0000000020000000 RSI: 00000000c028aa05 RDI: 0000000000000003
RBP: 00007fb39b2ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb39b3abf80 R15: 00007fff22688698
 </TASK>