7fbc7b05c000-7fbc7b05dfff: ffff888026ffd780
    7fbc7b05e000-7ffed14e8fff: 0000000000000000
    7ffed14e9000-7ffed1509fff: ffff88802ca76000
    7ffed150a000-ffffffffffffffff: 0000000000000000
------------[ cut here ]------------
WARNING: CPU: 0 PID: 21757 at mm/vma.c:808 vma_merge_existing_range mm/vma.c:808 [inline]
WARNING: CPU: 0 PID: 21757 at mm/vma.c:808 vma_modify+0x1540/0x1970 mm/vma.c:1604
Modules linked in:
CPU: 0 UID: 0 PID: 21757 Comm: syz.2.4114 Not tainted 6.15.0-syzkaller-10820-gcd2e103d57e5 #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 4e 56 ab ff 90 0f 0b 90 e9 a3 ec ff ff e8 40 56 ab ff 4c 89 f7 48 c7 c6 20 8c 96 8b e8 f1 05 f3 ff 90 <0f> 0b 90 e9 4c ed ff ff e8 23 56 ab ff e9 4f ee ff ff e8 19 56 ab
RSP: 0018:ffffc90003e9fb38 EFLAGS: 00010286
RAX: ffffffff8b5d28cd RBX: ffff88806b5cc000 RCX: ffff88801c7c3c00
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffffffffffffff
RBP: 0000200000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa644 R12: 0000200000000000
R13: ffffc90003e9fc60 R14: ffffc90003e9fc40 R15: 1ffff920007d3f8c
FS:  00007fbc7b0346c0(0000) GS:ffff888125c5f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8838ee56c0 CR3: 000000004eb35000 CR4: 0000000000350ef0
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_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc7a18e969
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:00007fbc7b034038 EFLAGS: 00000246 ORIG_RAX: 0000000000000098
RAX: ffffffffffffffda RBX: 00007fbc7a3b6080 RCX: 00007fbc7a18e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fbc7b034090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fbc7a3b6080 R15: 00007ffed15088c8
 </TASK>