------------[ cut here ]------------
family is 10 10
WARNING: net/sctp/socket.c:5734 at 0x0, CPU#0: syz.0.17/6442
Modules linked in:
CPU: 0 UID: 0 PID: 6442 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:sctp_getsockopt_peeloff_common+0x7b7/0x9b0 net/sctp/socket.c:5732
Code: 48 83 c3 10 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 e2 01 00 00 0f b7 13 4c 89 f7 44 89 e6 <67> 48 0f b9 3a 49 bc 00 00 00 00 00 fc ff df e9 68 ff ff ff 89 d9
RSP: 0018:ffffc90002ef7ba0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888079638950 RCX: dffffc0000000000
RDX: 000000000000000a RSI: 000000000000000a RDI: ffffffff8f906770
RBP: ffffc90002ef7c70 R08: ffff888033286a03 R09: 1ffff11006650d40
R10: dffffc0000000000 R11: ffffed1006650d41 R12: 000000000000000a
R13: 00000000ffffffe8 R14: ffffffff8f906770 R15: 1ffff1100e4f9f1b
FS:  00007f33f8a756c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3d9e8e1e9c CR3: 0000000075172000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 sctp_getsockopt_peeloff_flags+0x13b/0x230 net/sctp/socket.c:5804
 sctp_getsockopt+0x3ab/0xb60 net/sctp/socket.c:8154
 do_sock_getsockopt+0x2b4/0x3d0 net/socket.c:2399
 __sys_getsockopt net/socket.c:2428 [inline]
 __do_sys_getsockopt net/socket.c:2435 [inline]
 __se_sys_getsockopt net/socket.c:2432 [inline]
 __x64_sys_getsockopt+0x1a5/0x250 net/socket.c:2432
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33f7b8f749
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:00007f33f8a75038 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f33f7de5fa0 RCX: 00007f33f7b8f749
RDX: 000000000000007a RSI: 0000000000000084 RDI: 0000000000000003
RBP: 00007f33f7c13f91 R08: 0000200000000040 R09: 0000000000000000
R10: 0000200000000340 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33f7de6038 R14: 00007f33f7de5fa0 R15: 00007fff96669858
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 83 c3 10          	add    $0x10,%rbx
   4:	48 89 d8             	mov    %rbx,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  12:	fc ff df
  15:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax
  19:	84 c0                	test   %al,%al
  1b:	0f 85 e2 01 00 00    	jne    0x203
  21:	0f b7 13             	movzwl (%rbx),%edx
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	44 89 e6             	mov    %r12d,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  36:	fc ff df
  39:	e9 68 ff ff ff       	jmp    0xffffffa6
  3e:	89 d9                	mov    %ebx,%ecx