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:00007f2276a83038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007f2275da5fa0 RCX: 00007f2275b8d169
RDX: 0000000000003000 RSI: 0000000000001000 RDI: 0000200000ffc000
RBP: 00007f2276a83090 R08: 0000200000ffa000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f2275da5fa0 R15: 00007ffc3ccfe918
 </TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 UID: 0 PID: 11397 Comm: syz.3.1614 Not tainted 6.14.0-syzkaller-12966-ga2cc6ff5ec8f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline]
RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline]
RIP: 0010:expand_vma mm/mremap.c:1621 [inline]
RIP: 0010:mremap_at mm/mremap.c:1682 [inline]
RIP: 0010:do_mremap mm/mremap.c:1727 [inline]
RIP: 0010:__do_sys_mremap+0x1392/0x15c0 mm/mremap.c:1784
Code: 0f 85 45 02 00 00 48 8b 04 24 c6 84 24 70 01 00 00 01 48 01 85 68 02 00 00 eb 9a e8 18 34 af ff 48 b8 04 00 00 00 00 fc ff df <80> 38 00 0f 85 a7 01 00 00 48 8b 2c 25 20 00 00 00 31 ff 81 e5 00
RSP: 0018:ffffc90004dc7d20 EFLAGS: 00010293
RAX: dffffc0000000004 RBX: ffff8880798ab200 RCX: ffffffff821183c6
RDX: ffff88805049a440 RSI: ffffffff820c0cb8 RDI: 0000000000000005
RBP: ffff888026096140 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: fffffffffffd9f50 R12: 0000000000002000
R13: 1ffff920009b8faa R14: 0000200000ffc000 R15: ffff8880798ab370
FS:  00007f2276a836c0(0000) GS:ffff888124ab8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1137dc6324 CR3: 0000000012b96000 CR4: 00000000003526f0
DR0: 0000000100000001 DR1: 0000000000000001 DR2: 0000000000000006
DR3: 0000000000000003 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2275b8d169
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:00007f2276a83038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007f2275da5fa0 RCX: 00007f2275b8d169
RDX: 0000000000003000 RSI: 0000000000001000 RDI: 0000200000ffc000
RBP: 00007f2276a83090 R08: 0000200000ffa000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f2275da5fa0 R15: 00007ffc3ccfe918
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vrm_uncharge mm/mremap.c:964 [inline]
RIP: 0010:expand_vma_in_place mm/mremap.c:1566 [inline]
RIP: 0010:expand_vma mm/mremap.c:1621 [inline]
RIP: 0010:mremap_at mm/mremap.c:1682 [inline]
RIP: 0010:do_mremap mm/mremap.c:1727 [inline]
RIP: 0010:__do_sys_mremap+0x1392/0x15c0 mm/mremap.c:1784
Code: 0f 85 45 02 00 00 48 8b 04 24 c6 84 24 70 01 00 00 01 48 01 85 68 02 00 00 eb 9a e8 18 34 af ff 48 b8 04 00 00 00 00 fc ff df <80> 38 00 0f 85 a7 01 00 00 48 8b 2c 25 20 00 00 00 31 ff 81 e5 00
RSP: 0018:ffffc90004dc7d20 EFLAGS: 00010293
RAX: dffffc0000000004 RBX: ffff8880798ab200 RCX: ffffffff821183c6
RDX: ffff88805049a440 RSI: ffffffff820c0cb8 RDI: 0000000000000005
RBP: ffff888026096140 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: fffffffffffd9f50 R12: 0000000000002000
R13: 1ffff920009b8faa R14: 0000200000ffc000 R15: ffff8880798ab370
FS:  00007f2276a836c0(0000) GS:ffff8881249b8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fd0fff8 CR3: 0000000012b96000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00
   c:	0f 1f 40 00          	nopl   0x0(%rax)
  10:	48 89 f8             	mov    %rdi,%rax
  13:	48 89 f7             	mov    %rsi,%rdi
  16:	48 89 d6             	mov    %rdx,%rsi
  19:	48 89 ca             	mov    %rcx,%rdx
  1c:	4d 89 c2             	mov    %r8,%r10
  1f:	4d 89 c8             	mov    %r9,%r8
  22:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  27:	0f 05                	syscall
* 29:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax <-- trapping instruction
  2f:	73 01                	jae    0x32
  31:	c3                   	ret
  32:	48 c7 c1 a8 ff ff ff 	mov    $0xffffffffffffffa8,%rcx
  39:	f7 d8                	neg    %eax
  3b:	64 89 01             	mov    %eax,%fs:(%rcx)
  3e:	48                   	rex.W