general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 4191 Comm: syz-executor.0 Not tainted 6.1.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:shm_close+0xb8/0x580 ipc/shm.c:378
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 64 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5d 18 48 8d 7b 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 23 04 00 00 48 8b 43 08 48 85 c0 74 05 4c 89 ef
RSP: 0018:ffffc9000469fbb8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000008
RBP: ffff8881476ba980 R08: 0000000000000001 R09: ffff8880171036ef
R10: ffffed1002e206dd R11: 0000000000000000 R12: ffff88801697c000
R13: ffff888025c05870 R14: 0000000000000008 R15: ffff888025c05870
FS:  00007f6d00995700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6cffda80c0 CR3: 0000000021126000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 shm_mmap+0x189/0x220 ipc/shm.c:604
 call_mmap include/linux/fs.h:2196 [inline]
 mmap_region+0x565/0x1a60 mm/mmap.c:2625
 do_mmap+0x5a6/0xd30 mm/mmap.c:1412
 do_shmat+0xa69/0xc70 ipc/shm.c:1661
 __do_sys_shmat ipc/shm.c:1697 [inline]
 __se_sys_shmat ipc/shm.c:1692 [inline]
 __x64_sys_shmat+0xc4/0x140 ipc/shm.c:1692
 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: 0033:0x7f6cffc8b639
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:00007f6d00995168 EFLAGS: 00000246 ORIG_RAX: 000000000000001e
RAX: ffffffffffffffda RBX: 00007f6cffdabf80 RCX: 00007f6cffc8b639
RDX: ffffffffffffcfff RSI: 0000000020000000 RDI: 0000000000000008
RBP: 00007f6cffce67e1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef05a67ff R14: 00007f6d00995300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:shm_close+0xb8/0x580 ipc/shm.c:378
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 64 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5d 18 48 8d 7b 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 23 04 00 00 48 8b 43 08 48 85 c0 74 05 4c 89 ef
RSP: 0018:ffffc9000469fbb8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000008
RBP: ffff8881476ba980 R08: 0000000000000001 R09: ffff8880171036ef
R10: ffffed1002e206dd R11: 0000000000000000 R12: ffff88801697c000
R13: ffff888025c05870 R14: 0000000000000008 R15: ffff888025c05870
FS:  00007f6d00995700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6cffda80c0 CR3: 0000000021126000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 64 04 00 00    	jne    0x475
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df
  1b:	48 8b 5d 18          	mov    0x18(%rbp),%rbx
  1f:	48 8d 7b 08          	lea    0x8(%rbx),%rdi
  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:	0f 85 23 04 00 00    	jne    0x457
  34:	48 8b 43 08          	mov    0x8(%rbx),%rax
  38:	48 85 c0             	test   %rax,%rax
  3b:	74 05                	je     0x42
  3d:	4c 89 ef             	mov    %r13,%rdi