general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]
CPU: 0 PID: 7527 Comm: syz-executor.2 Not tainted 6.0.0-rc1-next-20220819-syzkaller #0
syz-executor.2[7527] cmdline: /root/syz-executor.2 exec
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:vma_is_shmem+0x21/0x40 mm/shmem.c:254
Code: 73 02 e9 20 fc ff ff 66 90 53 48 89 fb e8 d7 02 cf ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 10 48 81 bb 90 00 00 00 20 90 f7 89 5b 0f 94 c0 c3
RSP: 0018:ffffc900031bfb68 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000ac52000
RDX: 0000000000000012 RSI: ffffffff81ad1279 RDI: 0000000000000090
RBP: ffff88803ab04000 R08: 0000000000000006 R09: 0000000000000800
R10: 0000000000008001 R11: 0000000000000000 R12: 0000000000000800
R13: ffff88803ab00000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fa9c0fff700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa2afcfb8 CR3: 000000007780d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 io_pin_pages+0x25f/0x430 io_uring/rsrc.c:1207
 io_sqe_buffer_register+0x14e/0x13b0 io_uring/rsrc.c:1254
 io_sqe_buffers_register.cold+0x351/0x445 io_uring/rsrc.c:1346
 __io_uring_register io_uring/io_uring.c:3711 [inline]
 __do_sys_io_uring_register+0x96d/0x1110 io_uring/io_uring.c:3878
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa9c1889279
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa9c0fff168 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007fa9c199bf80 RCX: 00007fa9c1889279
RDX: 00000000200002c0 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fa9c18e3189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6bb1a02f R14: 00007fa9c0fff300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vma_is_shmem+0x21/0x40 mm/shmem.c:254
Code: 73 02 e9 20 fc ff ff 66 90 53 48 89 fb e8 d7 02 cf ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 10 48 81 bb 90 00 00 00 20 90 f7 89 5b 0f 94 c0 c3
RSP: 0018:ffffc900031bfb68 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000ac52000
RDX: 0000000000000012 RSI: ffffffff81ad1279 RDI: 0000000000000090
RBP: ffff88803ab04000 R08: 0000000000000006 R09: 0000000000000800
R10: 0000000000008001 R11: 0000000000000000 R12: 0000000000000800
R13: ffff88803ab00000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fa9c0fff700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa2afcfb8 CR3: 000000007780d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	73 02                	jae    0x4
   2:	e9 20 fc ff ff       	jmpq   0xfffffc27
   7:	66 90                	xchg   %ax,%ax
   9:	53                   	push   %rbx
   a:	48 89 fb             	mov    %rdi,%rbx
   d:	e8 d7 02 cf ff       	callq  0xffcf02e9
  12:	48 8d bb 90 00 00 00 	lea    0x90(%rbx),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	75 10                	jne    0x40
  30:	48 81 bb 90 00 00 00 	cmpq   $0xffffffff89f79020,0x90(%rbx)
  37:	20 90 f7 89
  3b:	5b                   	pop    %rbx
  3c:	0f 94 c0             	sete   %al
  3f:	c3                   	retq