------------[ cut here ]------------
WARNING: CPU: 0 PID: 7271 at mm/hugetlb.c:7048 hugetlb_change_protection+0xf2d/0x1a70 mm/hugetlb.c:7048
Modules linked in:
CPU: 0 PID: 7271 Comm: syz-executor.3 Not tainted 6.9.0-rc2-syzkaller-00080-gc85af715cac0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:hugetlb_change_protection+0xf2d/0x1a70 mm/hugetlb.c:7048
Code: 49 89 d5 48 89 d5 41 80 cd 80 e9 be f9 ff ff e8 79 6e a7 ff 4c 89 e6 48 89 ef e8 ae ff 0e 00 e9 25 f8 ff ff e8 64 6e a7 ff 90 <0f> 0b 90 48 8b ac 24 80 00 00 00 31 ff 48 89 ee e8 5e 69 a7 ff 48
RSP: 0018:ffffc9002b3ef850 EFLAGS: 00010287
RAX: 0000000000006ef6 RBX: ffff88801e524810 RCX: ffffc9000c604000
RDX: 0000000000040000 RSI: ffffffff81e6a7ec RDI: 0000000000000007
RBP: 000000000000001f R08: 0000000000000007 R09: 000000000000001f
R10: 000000000000001f R11: 0000000000000065 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000020400000 R15: ffff88801d28cf00
FS:  0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:00000000f5e89b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7f36ea0 CR3: 000000005fb10000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 change_protection+0x1235/0x3050 mm/mprotect.c:537
 mprotect_fixup+0x628/0xc90 mm/mprotect.c:653
 do_mprotect_pkey+0x84f/0xd60 mm/mprotect.c:809
 __do_sys_mprotect mm/mprotect.c:830 [inline]
 __se_sys_mprotect mm/mprotect.c:827 [inline]
 __ia32_sys_mprotect+0x75/0xb0 mm/mprotect.c:827
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x7a/0x120 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346
 entry_SYSENTER_compat_after_hwframe+0x7f/0x89
RIP: 0023:0xf728f579
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:00000000f5e895ac EFLAGS: 00000292 ORIG_RAX: 000000000000007d
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000800000
RDX: 0000000000000006 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