------------[ cut here ]------------
WARNING: CPU: 3 PID: 46 at arch/x86/include/asm/pgtable.h:403 pte_uffd_wp arch/x86/include/asm/pgtable.h:403 [inline]
WARNING: CPU: 3 PID: 46 at arch/x86/include/asm/pgtable.h:403 hpage_collapse_scan_pmd+0xd32/0x14c0 mm/khugepaged.c:1316
Modules linked in:
CPU: 3 PID: 46 Comm: khugepaged Not tainted 6.9.0-rc7-syzkaller-00012-gdccb07f2914c #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:pte_uffd_wp arch/x86/include/asm/pgtable.h:403 [inline]
RIP: 0010:hpage_collapse_scan_pmd+0xd32/0x14c0 mm/khugepaged.c:1316
Code: 90 90 e9 4b f6 ff ff 4c 8b 64 24 48 e8 27 e7 9e ff 31 ff 4c 89 ee e8 2d e2 9e ff 4d 85 ed 0f 84 b5 01 00 00 e8 0f e7 9e ff 90 <0f> 0b 90 41 be 09 00 00 00 0f b6 6c 24 47 48 8b 5c 24 10 e9 fb fa
RSP: 0018:ffffc900009e7bb0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88805addf000 RCX: ffffffff81eee5d3
RDX: ffff88801a44c880 RSI: ffffffff81eee5e1 RDI: 0000000000000007
RBP: 0000000104496c67 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000002 R12: 0000000020000000
R13: 0000000000000002 R14: 0000000000000400 R15: ffffffff8d964f20
FS:  0000000000000000(0000) GS:ffff88806b500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff1056d56c6 CR3: 0000000045dee000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 khugepaged_scan_mm_slot mm/khugepaged.c:2424 [inline]
 khugepaged_do_scan mm/khugepaged.c:2512 [inline]
 khugepaged+0x11eb/0x17c0 mm/khugepaged.c:2568
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>