Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 2 UID: 0 PID: 9602 Comm: syz.0.1540 Not tainted 6.14.0-syzkaller-12245-g91e5bfe317d8 #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: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 98 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:ffffc9000285fd20 EFLAGS: 00010283
RAX: dffffc0000000004 RBX: ffff888012e0bc00 RCX: ffffc90007821000
RDX: 0000000000080000 RSI: ffffffff820c0be8 RDI: 0000000000000007
RBP: ffff88805091de00 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000010000000 R11: 0000000000000000 R12: 0000000000003000
R13: 1ffff9200050bfaa R14: 0000200000000000 R15: ffff888012e0bd70
FS:  00007ff5ef9de6c0(0000) GS:ffff8880d6bbb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30f7fa7bac CR3: 00000000613e6000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 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: 0033:0x7ff5eeb8d169
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:00007ff5ef9de038 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007ff5eeda5fa0 RCX: 00007ff5eeb8d169
RDX: 0000000000004000 RSI: 0000000000001000 RDI: 0000200000000000
RBP: 00007ff5eec0e2a0 R08: 0000200000001000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff5eeda5fa0 R15: 00007ffde82d3938
 </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 98 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:ffffc9000285fd20 EFLAGS: 00010283
RAX: dffffc0000000004 RBX: ffff888012e0bc00 RCX: ffffc90007821000
RDX: 0000000000080000 RSI: ffffffff820c0be8 RDI: 0000000000000007
RBP: ffff88805091de00 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000010000000 R11: 0000000000000000 R12: 0000000000003000
R13: 1ffff9200050bfaa R14: 0000200000000000 R15: ffff888012e0bd70
FS:  00007ff5ef9de6c0(0000) GS:ffff8880d6cbb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555561d92808 CR3: 00000000613e6000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 85 45 02 00 00    	jne    0x24b
   6:	48 8b 04 24          	mov    (%rsp),%rax
   a:	c6 84 24 70 01 00 00 	movb   $0x1,0x170(%rsp)
  11:	01
  12:	48 01 85 68 02 00 00 	add    %rax,0x268(%rbp)
  19:	eb 9a                	jmp    0xffffffb5
  1b:	e8 98 34 af ff       	call   0xffaf34b8
  20:	48 b8 04 00 00 00 00 	movabs $0xdffffc0000000004,%rax
  27:	fc ff df
* 2a:	80 38 00             	cmpb   $0x0,(%rax) <-- trapping instruction
  2d:	0f 85 a7 01 00 00    	jne    0x1da
  33:	48 8b 2c 25 20 00 00 	mov    0x20,%rbp
  3a:	00
  3b:	31 ff                	xor    %edi,%edi
  3d:	81                   	.byte 0x81
  3e:	e5 00                	in     $0x0,%eax