f7fb2000-f7fb5fff: ffff888078b35280
    f7fb6000-f7fb7fff: ffff888078b35500
    f7fb8000-f7fb9fff: ffff888078b358c0
    f7fba000-ffa2efff: 0000000000000000
    ffa2f000-ffa4ffff: ffff888076294780
    ffa50000-ffffffffffffffff: 0000000000000000
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7949 at mm/vma.c:808 vma_merge_existing_range mm/vma.c:808 [inline]
WARNING: CPU: 1 PID: 7949 at mm/vma.c:808 vma_modify+0x1540/0x1970 mm/vma.c:1604
Modules linked in:
CPU: 1 UID: 0 PID: 7949 Comm: syz.1.571 Not tainted 6.15.0-syzkaller-11802-g1af80d00e1e0 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:vma_merge_existing_range mm/vma.c:808 [inline]
RIP: 0010:vma_modify+0x1540/0x1970 mm/vma.c:1604
Code: 0b 90 e9 9a ed ff ff e8 fe 60 ab ff 90 0f 0b 90 e9 a3 ec ff ff e8 f0 60 ab ff 4c 89 f7 48 c7 c6 a0 91 96 8b e8 71 07 f3 ff 90 <0f> 0b 90 e9 4c ed ff ff e8 d3 60 ab ff e9 4f ee ff ff e8 c9 60 ab
RSP: 0018:ffffc9001ada7b18 EFLAGS: 00010282
RAX: ffffffff8b5d58cd RBX: ffff88805a02f780 RCX: ffff888035058000
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffffffffffffff
RBP: 0000000080000000 R08: ffffc9001ada7687 R09: 1ffff920035b4ed0
R10: dffffc0000000000 R11: fffff520035b4ed1 R12: 0000000080000000
R13: ffffc9001ada7c40 R14: ffffc9001ada7c20 R15: 1ffff920035b4f88
FS:  0000000000000000(0000) GS:ffff888125d5c000(0063) knlGS:00000000f50b5b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c2ae1fe CR3: 00000000582be000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vma_modify_flags+0x1e8/0x230 mm/vma.c:1645
 mlock_fixup+0x22a/0x360 mm/mlock.c:483
 apply_mlockall_flags+0x2f0/0x3c0 mm/mlock.c:736
 __ia32_sys_munlockall+0x10a/0x220 mm/mlock.c:782
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fb8539
Code: 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 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f50b555c EFLAGS: 00000206 ORIG_RAX: 0000000000000099
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   4:	10 07                	adc    %al,(%rdi)
   6:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   a:	10 08                	adc    %cl,(%rax)
   c:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  20:	00 51 52             	add    %dl,0x52(%rcx)
  23:	55                   	push   %rbp
  24:	89 e5                	mov    %esp,%ebp
  26:	0f 34                	sysenter
  28:	cd 80                	int    $0x80
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	5a                   	pop    %rdx
  2c:	59                   	pop    %rcx
  2d:	c3                   	ret
  2e:	90                   	nop
  2f:	90                   	nop
  30:	90                   	nop
  31:	90                   	nop
  32:	90                   	nop
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop