BUG: kernel NULL pointer dereference, address: 0000000000000070
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 104bb3067 P4D 104bb3067 PUD 111c83067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 2999 Comm: syz-executor.0 Not tainted 6.5.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:skb_segment+0x739/0xf10 net/core/skbuff.c:4455
Code: fb 48 85 d2 0f 85 6f fd ff ff eb ba 48 8b 94 24 80 00 00 00 48 c1 ea 23 89 d0 41 21 d2 83 e0 01 e9 e6 fc ff ff 48 8b 54 24 60 <44> 8b 72 70 e9 97 fa ff ff 48 8b 84 24 80 00 00 00 48 d1 e8 83 e0
RSP: 0018:ffffc90002dbb930 EFLAGS: 00010246
RAX: 000000000001ffc6 RBX: 000000000001fffe RCX: 000000000000ffff
RDX: 0000000000000000 RSI: ffff888102e44000 RDI: 0000000000000001
RBP: ffffc90002dbba00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000030
R13: ffff88810478bc00 R14: 000000000000ffff R15: 0000000000000000
FS:  00007fe31cd326c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000070 CR3: 0000000104702000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udp6_ufo_fragment+0x21e/0x290 net/ipv6/udp_offload.c:109
 ipv6_gso_segment+0x119/0x530 net/ipv6/ip6_offload.c:120
 skb_mac_gso_segment+0xc0/0x160 net/core/gso.c:53
 __skb_gso_segment+0xb2/0x160 net/core/gso.c:124
 skb_gso_segment include/net/gso.h:83 [inline]
 validate_xmit_skb.constprop.0+0x166/0x350 net/core/dev.c:3623
 __dev_queue_xmit+0x248/0xee0 net/core/dev.c:4327
 packet_snd net/packet/af_packet.c:3083 [inline]
 packet_sendmsg+0xb84/0x1a00 net/packet/af_packet.c:3115
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg+0x37/0x70 net/socket.c:748
 ____sys_sendmsg+0x25f/0x290 net/socket.c:2494
 ___sys_sendmsg+0x95/0xe0 net/socket.c:2548
 __sys_sendmsg+0x75/0xc0 net/socket.c:2577
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe31c07cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe31cd320c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe31c19bf80 RCX: 00007fe31c07cae9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00007fe31c0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007fe31c19bf80 R15: 00007ffdfc80ca38
 </TASK>
Modules linked in:
CR2: 0000000000000070
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_segment+0x739/0xf10 net/core/skbuff.c:4455
Code: fb 48 85 d2 0f 85 6f fd ff ff eb ba 48 8b 94 24 80 00 00 00 48 c1 ea 23 89 d0 41 21 d2 83 e0 01 e9 e6 fc ff ff 48 8b 54 24 60 <44> 8b 72 70 e9 97 fa ff ff 48 8b 84 24 80 00 00 00 48 d1 e8 83 e0
RSP: 0018:ffffc90002dbb930 EFLAGS: 00010246
RAX: 000000000001ffc6 RBX: 000000000001fffe RCX: 000000000000ffff
RDX: 0000000000000000 RSI: ffff888102e44000 RDI: 0000000000000001
RBP: ffffc90002dbba00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000030
R13: ffff88810478bc00 R14: 000000000000ffff R15: 0000000000000000
FS:  00007fe31cd326c0(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000070 CR3: 0000000104702000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	fb                   	sti
   1:	48 85 d2             	test   %rdx,%rdx
   4:	0f 85 6f fd ff ff    	jne    0xfffffd79
   a:	eb ba                	jmp    0xffffffc6
   c:	48 8b 94 24 80 00 00 	mov    0x80(%rsp),%rdx
  13:	00
  14:	48 c1 ea 23          	shr    $0x23,%rdx
  18:	89 d0                	mov    %edx,%eax
  1a:	41 21 d2             	and    %edx,%r10d
  1d:	83 e0 01             	and    $0x1,%eax
  20:	e9 e6 fc ff ff       	jmp    0xfffffd0b
  25:	48 8b 54 24 60       	mov    0x60(%rsp),%rdx
* 2a:	44 8b 72 70          	mov    0x70(%rdx),%r14d <-- trapping instruction
  2e:	e9 97 fa ff ff       	jmp    0xfffffaca
  33:	48 8b 84 24 80 00 00 	mov    0x80(%rsp),%rax
  3a:	00
  3b:	48 d1 e8             	shr    %rax
  3e:	83                   	.byte 0x83
  3f:	e0                   	.byte 0xe0