general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 PID: 350 Comm: syz-executor.0 Not tainted 6.7.0-rc5-syzkaller-ga39b6ac3781d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:skb_segment+0x2a41/0x4040 net/core/skbuff.c:4551
Code: 00 00 41 3b 1e 0f 83 42 09 00 00 e8 f9 a0 70 fd 4c 89 7c 24 50 e9 2b e1 ff ff e8 ea a0 70 fd 49 8d 5f 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 f9 08 00 00 44 8b 2b 4c 8b b4 24 98 00
RSP: 0018:ffffc90002e3ef80 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88811d5de480
RDX: 0000000000000000 RSI: ffff88810b65757e RDI: 000000000000ffff
RBP: ffffc90002e3f1f0 R08: ffffffff84078eb3 R09: ffffffff840c5e20
R10: 0000000000000002 R11: ffff88811d5de480 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88810b657570 R15: 0000000000000000
FS:  00007f837f97c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020010000 CR3: 000000010b689000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udp6_ufo_fragment+0x8b6/0xdf0 net/ipv6/udp_offload.c:109
 ipv6_gso_segment+0x698/0x1810 net/ipv6/ip6_offload.c:120
 skb_mac_gso_segment+0x2cf/0x4e0 net/core/gso.c:53
 __skb_gso_segment+0x347/0x4f0 net/core/gso.c:124
 skb_gso_segment include/net/gso.h:83 [inline]
 validate_xmit_skb+0x340/0xe30 net/core/dev.c:3626
 __dev_queue_xmit+0x13c6/0x3320 net/core/dev.c:4338
 dev_queue_xmit include/linux/netdevice.h:3134 [inline]
 packet_xmit+0x76/0x340 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3087 [inline]
 packet_sendmsg+0x47ff/0x6290 net/packet/af_packet.c:3119
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 __sys_sendto+0x487/0x640 net/socket.c:2190
 __do_sys_sendto net/socket.c:2202 [inline]
 __se_sys_sendto net/socket.c:2198 [inline]
 __x64_sys_sendto+0xe9/0x100 net/socket.c:2198
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0xe0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f837ec7cba9
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:00007f837f97c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f837ed9bf80 RCX: 00007f837ec7cba9
RDX: 0000000000010048 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f837ecc847a R08: 0000000020000540 R09: 0000000000000014
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f837ed9bf80 R15: 00007ffd78696218
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_segment+0x2a41/0x4040 net/core/skbuff.c:4551
Code: 00 00 41 3b 1e 0f 83 42 09 00 00 e8 f9 a0 70 fd 4c 89 7c 24 50 e9 2b e1 ff ff e8 ea a0 70 fd 49 8d 5f 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 f9 08 00 00 44 8b 2b 4c 8b b4 24 98 00
RSP: 0018:ffffc90002e3ef80 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88811d5de480
RDX: 0000000000000000 RSI: ffff88810b65757e RDI: 000000000000ffff
RBP: ffffc90002e3f1f0 R08: ffffffff84078eb3 R09: ffffffff840c5e20
R10: 0000000000000002 R11: ffff88811d5de480 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88810b657570 R15: 0000000000000000
FS:  00007f837f97c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020010000 CR3: 000000010b689000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	41 3b 1e             	cmp    (%r14),%ebx
   5:	0f 83 42 09 00 00    	jae    0x94d
   b:	e8 f9 a0 70 fd       	call   0xfd70a109
  10:	4c 89 7c 24 50       	mov    %r15,0x50(%rsp)
  15:	e9 2b e1 ff ff       	jmp    0xffffe145
  1a:	e8 ea a0 70 fd       	call   0xfd70a109
  1f:	49 8d 5f 70          	lea    0x70(%r15),%rbx
  23:	48 89 d8             	mov    %rbx,%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 f9 08 00 00    	jne    0x930
  37:	44 8b 2b             	mov    (%rbx),%r13d
  3a:	4c                   	rex.WR
  3b:	8b                   	.byte 0x8b
  3c:	b4 24                	mov    $0x24,%ah
  3e:	98                   	cwtl