Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 3 UID: 0 PID: 6152 Comm: syz.1.63 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 38 2a b0 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:ffffc90002bafd10 EFLAGS: 00010283
RAX: dffffc0000000004 RBX: ffff888020043c00 RCX: ffffc9000c803000
RDX: 0000000000080000 RSI: ffffffff820b1598 RDI: 0000000000000007
RBP: ffff88804c899a40 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000010000000 R11: 0000000000000000 R12: 0000000000001000
R13: 1ffff92000575fa8 R14: 0000000080ffc000 R15: ffff888020043d70
FS:  0000000000000000(0000) GS:ffff888097ac1000(0063) knlGS:00000000f5086b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c390d4d CR3: 000000002a234000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x73/0x120 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: 0023:0xf73fe579
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:00000000f508655c EFLAGS: 00000296 ORIG_RAX: 00000000000000a3
RAX: ffffffffffffffda RBX: 0000000080ffc000 RCX: 0000000000001000
RDX: 0000000000002000 RSI: 0000000000000000 RDI: 0000000080ffb000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </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 38 2a b0 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:ffffc90002bafd10 EFLAGS: 00010283
RAX: dffffc0000000004 RBX: ffff888020043c00 RCX: ffffc9000c803000
RDX: 0000000000080000 RSI: ffffffff820b1598 RDI: 0000000000000007
RBP: ffff88804c899a40 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000010000000 R11: 0000000000000000 R12: 0000000000001000
R13: 1ffff92000575fa8 R14: 0000000080ffc000 R15: ffff888020043d70
FS:  0000000000000000(0000) GS:ffff8880979c1000(0063) knlGS:00000000f5086b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c38ec98 CR3: 000000002a234000 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 38 2a b0 ff       	call   0xffb02a58
  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