Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 PID: 9911 Comm: syz.0.1490 Not tainted 6.10.0-rc6-syzkaller-00165-g0ec986ed7bab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:reuseport_add_sock+0x27e/0x5e0 net/core/sock_reuseport.c:350
Code: 00 0f b7 5d 00 bf 01 00 00 00 89 de e8 1b 99 2e f8 83 fb 01 0f 85 a3 01 00 00 e8 6d 95 2e f8 49 8d 7e 12 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 4b 02 00 00 41 0f b7 5e 12 49 8d 7e 14
RSP: 0018:ffffc90009db7c98 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff88807d98df98 RCX: ffff888021099e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000012
RBP: 0000000000000001 R08: ffffffff896790dd R09: 1ffffffff1f5a93d
R10: dffffc0000000000 R11: fffffbfff1f5a93e R12: ffff88807d98dac0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9a9f6d66c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a9f6d5fa8 CR3: 000000007ee6a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __sctp_hash_endpoint net/sctp/input.c:762 [inline]
 sctp_hash_endpoint+0x52a/0x600 net/sctp/input.c:790
 sctp_listen_start net/sctp/socket.c:8565 [inline]
 sctp_inet_listen+0x767/0xa20 net/sctp/socket.c:8620
 __sys_listen+0x1b7/0x230 net/socket.c:1881
 __do_sys_listen net/socket.c:1890 [inline]
 __se_sys_listen net/socket.c:1888 [inline]
 __x64_sys_listen+0x5a/0x70 net/socket.c:1888
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a9e975bd9
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:00007f9a9f6d6048 EFLAGS: 00000246 ORIG_RAX: 0000000000000032
RAX: ffffffffffffffda RBX: 00007f9a9eb04110 RCX: 00007f9a9e975bd9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000008
RBP: 00007f9a9e9e4aa1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9a9eb04110 R15: 00007ffd3770d4f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:reuseport_add_sock+0x27e/0x5e0 net/core/sock_reuseport.c:350
Code: 00 0f b7 5d 00 bf 01 00 00 00 89 de e8 1b 99 2e f8 83 fb 01 0f 85 a3 01 00 00 e8 6d 95 2e f8 49 8d 7e 12 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 4b 02 00 00 41 0f b7 5e 12 49 8d 7e 14
RSP: 0018:ffffc90009db7c98 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff88807d98df98 RCX: ffff888021099e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000012
RBP: 0000000000000001 R08: ffffffff896790dd R09: 1ffffffff1f5a93d
R10: dffffc0000000000 R11: fffffbfff1f5a93e R12: ffff88807d98dac0
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9a9f6d66c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a9f6d5fa8 CR3: 000000007ee6a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 0f                	add    %cl,(%rdi)
   2:	b7 5d                	mov    $0x5d,%bh
   4:	00 bf 01 00 00 00    	add    %bh,0x1(%rdi)
   a:	89 de                	mov    %ebx,%esi
   c:	e8 1b 99 2e f8       	call   0xf82e992c
  11:	83 fb 01             	cmp    $0x1,%ebx
  14:	0f 85 a3 01 00 00    	jne    0x1bd
  1a:	e8 6d 95 2e f8       	call   0xf82e958c
  1f:	49 8d 7e 12          	lea    0x12(%r14),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 4b 02 00 00    	jne    0x282
  37:	41 0f b7 5e 12       	movzwl 0x12(%r14),%ebx
  3c:	49 8d 7e 14          	lea    0x14(%r14),%rdi