7fdcc8e37000-7ffceb159fff: 0000000000000000
    7ffceb15a000-7ffceb17afff: ffff88802ef39640
    7ffceb17b000-ffffffffffffffff: 0000000000000000
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8794 at mm/vma.c:768 vma_merge_existing_range+0x1257/0x15b0 mm/vma.c:768
Modules linked in:
CPU: 1 UID: 0 PID: 8794 Comm: syz.0.658 Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:vma_merge_existing_range+0x1257/0x15b0 mm/vma.c:768
Code: 0b 90 e9 52 f0 ff ff e8 77 d9 ab ff 90 0f 0b 90 e9 87 ef ff ff e8 69 d9 ab ff 48 89 df 48 c7 c6 40 68 76 8b e8 da ff f2 ff 90 <0f> 0b 90 e9 ff ef ff ff e8 4c d9 ab ff e9 04 f1 ff ff e8 42 d9 ab
RSP: 0018:ffffc9000b78faf8 EFLAGS: 00010286
RAX: ffffffff8b4f15fd RBX: ffffc9000b78fc40 RCX: ffff88801bf39e00
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffffffffffffff
RBP: 0000200000800000 R08: ffffc9000b78f627 R09: 1ffff920016f1ec4
R10: dffffc0000000000 R11: fffff520016f1ec5 R12: ffff88802e10eb40
R13: 1ffff920016f1f8c R14: 0000200000000000 R15: 0000200000000000
FS:  00007fdcc8e0d6c0(0000) GS:ffff8881261c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8dc0571440 CR3: 000000007e10c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 vma_modify+0x76/0x460 mm/vma.c:1564
 vma_modify_flags+0x1e8/0x230 mm/vma.c:1605
 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_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdcc7f8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdcc8e0d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000098
RAX: ffffffffffffffda RBX: 00007fdcc81b6080 RCX: 00007fdcc7f8e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fdcc8e0d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000001 R14: 00007fdcc81b6080 R15: 00007ffceb17a038
 </TASK>