------------[ cut here ]------------
kernel BUG at mm/page_table_check.c:157!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5974 Comm: syz.0.113 Not tainted 6.11.0-rc2-syzkaller-00002-gc813111d19e6 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__page_table_check_zero+0x306/0x370 mm/page_table_check.c:157
Code: ff 48 89 ef e8 ab d0 ff ff 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 08 3a 97 ff e8 03 3a 97 ff 90 0f 0b e8 fb 39 97 ff 90 <0f> 0b e8 f3 39 97 ff 90 0f 0b e8 6b c5 f5 ff e9 85 fd ff ff 48 c7
RSP: 0018:ffffc9003dbffad8 EFLAGS: 00010283
RAX: 0000000000021023 RBX: 0000000000000001 RCX: ffffc900398bc000
RDX: 0000000000040000 RSI: ffffffff81f3e9e5 RDI: 0000000000000005
RBP: ffff888042028000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000000a R14: ffff88804202804c R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5705b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c3a11bd CR3: 0000000048fa0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 page_table_check_free include/linux/page_table_check.h:41 [inline]
 free_pages_prepare mm/page_alloc.c:1095 [inline]
 __free_pages_ok+0x5d4/0xbd0 mm/page_alloc.c:1214
 hcd_buffer_free_pages+0xe8/0x180 drivers/usb/core/buffer.c:210
 dec_usb_memory_use_count+0x27b/0x410 drivers/usb/core/devio.c:198
 mmap_region+0x15ee/0x2760 mm/mmap.c:3076
 do_mmap+0xbfb/0xfb0 mm/mmap.c:1468
 vm_mmap_pgoff+0x1ba/0x360 mm/util.c:588
 ksys_mmap_pgoff+0x332/0x5d0 mm/mmap.c:1514
 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: 0023:0xf7f77579
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:00000000f570557c EFLAGS: 00000292 ORIG_RAX: 00000000000000c0
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000400000
RDX: 000000000000000f RSI: 0000000000011012 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__page_table_check_zero+0x306/0x370 mm/page_table_check.c:157
Code: ff 48 89 ef e8 ab d0 ff ff 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 08 3a 97 ff e8 03 3a 97 ff 90 0f 0b e8 fb 39 97 ff 90 <0f> 0b e8 f3 39 97 ff 90 0f 0b e8 6b c5 f5 ff e9 85 fd ff ff 48 c7
RSP: 0018:ffffc9003dbffad8 EFLAGS: 00010283
RAX: 0000000000021023 RBX: 0000000000000001 RCX: ffffc900398bc000
RDX: 0000000000040000 RSI: ffffffff81f3e9e5 RDI: 0000000000000005
RBP: ffff888042028000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000000a R14: ffff88804202804c R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:00000000f5705b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020470000 CR3: 0000000048fa0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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