------------[ cut here ]------------
WARNING: CPU: 3 PID: 5408 at arch/x86/include/asm/pgtable.h:403 pte_uffd_wp arch/x86/include/asm/pgtable.h:403 [inline]
WARNING: CPU: 3 PID: 5408 at arch/x86/include/asm/pgtable.h:403 pagemap_scan_pmd_entry+0x1d27/0x23f0 fs/proc/task_mmu.c:2146
Modules linked in:
CPU: 3 PID: 5408 Comm: syz-executor.1 Not tainted 6.7.0-rc1-syzkaller-00366-geb3479bc23fa #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:pagemap_scan_pmd_entry+0x1d27/0x23f0 fs/proc/task_mmu.c:2146
Code: ff ff e8 cc 1b 76 ff 48 89 e8 31 ff 83 e0 02 48 89 c6 48 89 04 24 e8 48 17 76 ff 48 8b 04 24 48 85 c0 74 25 e8 aa 1b 76 ff 90 <0f> 0b 90 e9 71 ff ff ff 4c 89 74 24 68 4c 8b 74 24 10 c7 44 24 28
RSP: 0018:ffffc90007b87848 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000020ff8000 RCX: ffffffff82116e78
RDX: ffff888019872400 RSI: ffffffff82116e86 RDI: 0000000000000007
RBP: 00000000557adc67 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000000400 R14: 0000000000000000 R15: ffff88804d512fb8
FS:  0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000f7f6cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000ca0988 CR3: 00000000271bc000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 walk_pmd_range mm/pagewalk.c:143 [inline]
 walk_pud_range mm/pagewalk.c:221 [inline]
 walk_p4d_range mm/pagewalk.c:256 [inline]
 walk_pgd_range+0xa48/0x1870 mm/pagewalk.c:293
 __walk_page_range+0x630/0x770 mm/pagewalk.c:395
 walk_page_range+0x626/0xa80 mm/pagewalk.c:521
 do_pagemap_scan+0x40d/0xcd0 fs/proc/task_mmu.c:2437
 do_pagemap_cmd+0x5e/0x80 fs/proc/task_mmu.c:2478
 __do_compat_sys_ioctl+0x2bf/0x330 fs/ioctl.c:972
 do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline]
 __do_fast_syscall_32+0x62/0xe0 arch/x86/entry/common.c:230
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:255
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a
RIP: 0023:0xf7f71579
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:00000000f7f6c5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c0606610
RDX: 0000000020000180 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi