IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
BUG: unable to handle kernel NULL pointer dereference at 0000000000000012
PGD 80000001303a3067 P4D 80000001303a3067 PUD 1301d9067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 1 PID: 5248 Comm: syz.0.249 Not tainted 4.20.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:reuseport_add_sock+0x5d/0x190 net/core/sock_reuseport.c:170
Code: c7 c7 60 90 5f 83 e8 e2 b0 3b 00 4d 8b b5 40 04 00 00 48 8b 9b 40 04 00 00 4d 85 f6 74 0c 66 41 83 7e 12 01 0f 85 13 01 00 00 <0f> b7 43 12 49 89 dc 66 3b 43 10 74 48 4c 89 6c c3 28 66 83 43 12
RSP: 0018:ffffc90002157e08 EFLAGS: 00010246
RAX: ffffffff8212b95e RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff831bcdf2 RDI: ffffffff83078166
RBP: ffffc90002157e38 R08: 0000000000000000 R09: 0000000040b3f662
R10: 0000000000000000 R11: ffff88813049e678 R12: ffff8881302ffa00
R13: ffff888131d9e200 R14: 0000000000000000 R15: ffff888131d9e200
FS:  00007f4d7ee066c0(0000) GS:ffff88813bb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000012 CR3: 0000000133f7c000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __sctp_hash_endpoint net/sctp/input.c:758 [inline]
 sctp_hash_endpoint+0x165/0x170 net/sctp/input.c:786
 sctp_listen_start net/sctp/socket.c:7875 [inline]
 sctp_inet_listen+0x13e/0x1d0 net/sctp/socket.c:7930
 __sys_listen+0x6c/0xb0 net/socket.c:1517
 __do_sys_listen net/socket.c:1526 [inline]
 __se_sys_listen net/socket.c:1524 [inline]
 __x64_sys_listen+0x11/0x20 net/socket.c:1524
 do_syscall_64+0x55/0x140 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4d7f37e299
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:00007f4d7ee06048 EFLAGS: 00000246 ORIG_RAX: 0000000000000032
RAX: ffffffffffffffda RBX: 00007f4d7f50cf80 RCX: 00007f4d7f37e299
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f4d7f3eb8e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4d7f50cf80 R15: 00007fff0cac4078
Modules linked in:
CR2: 0000000000000012
---[ end trace d4c88256bdbe9559 ]---
RIP: 0010:reuseport_add_sock+0x5d/0x190 net/core/sock_reuseport.c:170
Code: c7 c7 60 90 5f 83 e8 e2 b0 3b 00 4d 8b b5 40 04 00 00 48 8b 9b 40 04 00 00 4d 85 f6 74 0c 66 41 83 7e 12 01 0f 85 13 01 00 00 <0f> b7 43 12 49 89 dc 66 3b 43 10 74 48 4c 89 6c c3 28 66 83 43 12
RSP: 0018:ffffc90002157e08 EFLAGS: 00010246
RAX: ffffffff8212b95e RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff831bcdf2 RDI: ffffffff83078166
RBP: ffffc90002157e38 R08: 0000000000000000 R09: 0000000040b3f662
R10: 0000000000000000 R11: ffff88813049e678 R12: ffff8881302ffa00
R13: ffff888131d9e200 R14: 0000000000000000 R15: ffff888131d9e200
FS:  00007f4d7ee066c0(0000) GS:ffff88813bb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000012 CR3: 0000000133f7c000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c7 c7 60 90 5f 83    	mov    $0x835f9060,%edi
   6:	e8 e2 b0 3b 00       	call   0x3bb0ed
   b:	4d 8b b5 40 04 00 00 	mov    0x440(%r13),%r14
  12:	48 8b 9b 40 04 00 00 	mov    0x440(%rbx),%rbx
  19:	4d 85 f6             	test   %r14,%r14
  1c:	74 0c                	je     0x2a
  1e:	66 41 83 7e 12 01    	cmpw   $0x1,0x12(%r14)
  24:	0f 85 13 01 00 00    	jne    0x13d
* 2a:	0f b7 43 12          	movzwl 0x12(%rbx),%eax <-- trapping instruction
  2e:	49 89 dc             	mov    %rbx,%r12
  31:	66 3b 43 10          	cmp    0x10(%rbx),%ax
  35:	74 48                	je     0x7f
  37:	4c 89 6c c3 28       	mov    %r13,0x28(%rbx,%rax,8)
  3c:	66                   	data16
  3d:	83                   	.byte 0x83
  3e:	43                   	rex.XB
  3f:	12                   	.byte 0x12