f7fc3000-ffe7efff: 0000000000000000
    ffe7f000-ffe9ffff: ffff8880605f1040
    ffea0000-ffffffffffffffff: 0000000000000000
------------[ cut here ]------------
WARNING: CPU: 0 PID: 13375 at mm/vma.c:808 vma_merge_existing_range mm/vma.c:808 [inline]
WARNING: CPU: 0 PID: 13375 at mm/vma.c:808 vma_modify+0xa28/0x20a0 mm/vma.c:1604
Modules linked in:
CPU: 0 UID: 0 PID: 13375 Comm: syz.6.1327 Not tainted 6.15.0-syzkaller-12141-gec7714e49479 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:vma_merge_existing_range mm/vma.c:808 [inline]
RIP: 0010:vma_modify+0xa28/0x20a0 mm/vma.c:1604
Code: 12 00 00 4c 8b 63 28 4d 85 e4 0f 85 86 02 00 00 e9 b3 01 00 00 e8 28 f9 a9 ff 48 c7 c6 e0 03 9c 8b 48 89 df e8 f9 22 f2 ff 90 <0f> 0b 90 e9 51 f8 ff ff e8 0b f9 a9 ff 48 8b 54 24 20 48 b8 00 00
RSP: 0018:ffffc90003a1fb48 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc90003a1fc68 RCX: ffffffff8b71a883
RDX: ffff888012f2c880 RSI: ffffffff82118997 RDI: 0000000000000006
RBP: ffff888012f95a40 R08: 0000000000000006 R09: ffffffffffffffff
R10: ffffffffffffffff R11: 0000000000000001 R12: 0000000080000001
R13: 0000000000000001 R14: 0000000080000000 R15: ffffc90003a1fc88
FS:  0000000000000000(0000) GS:ffff888097765000(0063) knlGS:00000000f50c5b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000559ee2961950 CR3: 000000005966d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 vma_modify_flags+0x212/0x2d0 mm/vma.c:1645
 mlock_fixup+0x27c/0xe50 mm/mlock.c:483
 apply_mlockall_flags+0x2d4/0x470 mm/mlock.c:736
 __do_sys_munlockall+0xc5/0x280 mm/mlock.c:782
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fc1579
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:00000000f50c555c EFLAGS: 00000296 ORIG_RAX: 0000000000000099
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 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