BUG: unable to handle page fault for address: ffffffff000000c7
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD c572067 P4D c572067 PUD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5110 Comm: syz-fuzzer Not tainted 6.3.0-rc3-next-20230323-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:vma_merge+0x243/0x1fd0 mm/mmap.c:952
Code: 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 <48> 8b b0 a8 00 00 00 4c 39 ee 0f 84 bf 03 00 00 48 89 74 24 50 e8
RSP: 0018:ffffc900043ef998 EFLAGS: 00010246
RAX: ffffffff0000001f RBX: ffff88806fd15a00 RCX: 0000000000000000
RDX: 1fffffffe0000018 RSI: ffffffff81c37957 RDI: ffffffff000000c7
RBP: ffff88806fd15800 R08: 0000000000000006 R09: 0000000000000000
R10: 000000c0021fffff R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 000000c002200000 R15: 0000000000000000
FS:  000000c000bf6890(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff000000c7 CR3: 000000001c42f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 madvise_update_vma+0x23f/0xd40 mm/madvise.c:153
 madvise_vma_behavior+0x7f6/0x20e0 mm/madvise.c:1091
 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1260
 do_madvise.part.0+0x193/0x470 mm/madvise.c:1439
 do_madvise mm/madvise.c:1452 [inline]
 __do_sys_madvise mm/madvise.c:1452 [inline]
 __se_sys_madvise mm/madvise.c:1450 [inline]
 __x64_sys_madvise+0x117/0x150 mm/madvise.c:1450
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x46b557
Code: 8b 24 24 48 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:000000c000235e60 EFLAGS: 00000206 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 0000000000a12000 RCX: 000000000046b557
RDX: 000000000000000e RSI: 0000000000800000 RDI: 000000c001e00000
RBP: 000000c000235e88 R08: 0000000000000509 R09: 000000c001cf2000
R10: 0000000000001381 R11: 0000000000000206 R12: 0000000000000509
R13: 0000000000000003 R14: 000000c0004f6d00 R15: 00000000010e0700
 </TASK>
Modules linked in:
CR2: ffffffff000000c7
---[ end trace 0000000000000000 ]---
RIP: 0010:vma_merge+0x243/0x1fd0 mm/mmap.c:952
Code: 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 <48> 8b b0 a8 00 00 00 4c 39 ee 0f 84 bf 03 00 00 48 89 74 24 50 e8
RSP: 0018:ffffc900043ef998 EFLAGS: 00010246
RAX: ffffffff0000001f RBX: ffff88806fd15a00 RCX: 0000000000000000
RDX: 1fffffffe0000018 RSI: ffffffff81c37957 RDI: ffffffff000000c7
RBP: ffff88806fd15800 R08: 0000000000000006 R09: 0000000000000000
R10: 000000c0021fffff R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 000000c002200000 R15: 0000000000000000
FS:  000000c000bf6890(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff000000c7 CR3: 000000001c42f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	44 24 08             	rex.R and $0x8,%al
   3:	48 8d b8 a8 00 00 00 	lea    0xa8(%rax),%rdi
   a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  11:	fc ff df
  14:	48 89 fa             	mov    %rdi,%rdx
  17:	48 c1 ea 03          	shr    $0x3,%rdx
  1b:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  1f:	0f 85 4d 18 00 00    	jne    0x1872
  25:	48 8b 44 24 08       	mov    0x8(%rsp),%rax
* 2a:	48 8b b0 a8 00 00 00 	mov    0xa8(%rax),%rsi <-- trapping instruction
  31:	4c 39 ee             	cmp    %r13,%rsi
  34:	0f 84 bf 03 00 00    	je     0x3f9
  3a:	48 89 74 24 50       	mov    %rsi,0x50(%rsp)
  3f:	e8                   	.byte 0xe8