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: 295 Comm: syz-executor177 Not tainted 6.1.57-syzkaller-00010-ga9567a35d0b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:skb_segment+0x2f49/0x46c0 net/core/skbuff.c:4241
Code: bc 24 90 00 00 00 e9 19 de ff ff e8 f1 4f 73 fd 48 8b 44 24 28 48 8d 58 70 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 0d 09 00 00 44 8b 23 4c 8b b4 24 b0 00 00
RSP: 0018:ffffc90000dd7000 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff88810e9c443e RDI: 000000000000ffff
RBP: ffffc90000dd7270 R08: ffffffff8401be79 R09: ffffffff8406447c
R10: 0000000000000002 R11: ffff88811d78a880 R12: 0000000000000000
R13: 000000000000003e R14: ffff88810e9c4430 R15: ffff88810f17b002
FS: 000055555573a380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020010000 CR3: 00000001096eb000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
udp6_ufo_fragment+0x94d/0xe50 net/ipv6/udp_offload.c:108
ipv6_gso_segment+0x6ff/0x1960 net/ipv6/ip6_offload.c:138
skb_mac_gso_segment+0x296/0x550 net/core/gro.c:141
__skb_gso_segment+0x32d/0x4c0 net/core/dev.c:3425
skb_gso_segment include/linux/netdevice.h:4852 [inline]
validate_xmit_skb+0x323/0xe40 net/core/dev.c:3683
__dev_queue_xmit+0x1636/0x36e0 net/core/dev.c:4260
dev_queue_xmit+0x17/0x20 include/linux/netdevice.h:3076
packet_snd net/packet/af_packet.c:3077 [inline]
packet_sendmsg+0x48dd/0x6510 net/packet/af_packet.c:3108
sock_sendmsg_nosec net/socket.c:716 [inline]
__sock_sendmsg net/socket.c:728 [inline]
__sys_sendto+0x471/0x5f0 net/socket.c:2134
__do_sys_sendto net/socket.c:2146 [inline]
__se_sys_sendto net/socket.c:2142 [inline]
__x64_sys_sendto+0xe5/0x100 net/socket.c:2142
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8391916419
Code: 48 83 c4 28 c3 e8 d7 19 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdf6e22238 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f8391963390 RCX: 00007f8391916419
RDX: 0000000000010048 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000020000540 R09: 0000000000000014
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdf6e22290
R13: 00007ffdf6e22260 R14: 0000000000000001 R15: 00007ffdf6e22290
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_segment+0x2f49/0x46c0 net/core/skbuff.c:4241
Code: bc 24 90 00 00 00 e9 19 de ff ff e8 f1 4f 73 fd 48 8b 44 24 28 48 8d 58 70 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 0d 09 00 00 44 8b 23 4c 8b b4 24 b0 00 00
RSP: 0018:ffffc90000dd7000 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff88810e9c443e RDI: 000000000000ffff
RBP: ffffc90000dd7270 R08: ffffffff8401be79 R09: ffffffff8406447c
R10: 0000000000000002 R11: ffff88811d78a880 R12: 0000000000000000
R13: 000000000000003e R14: ffff88810e9c4430 R15: ffff88810f17b002
FS: 000055555573a380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020010000 CR3: 00000001096eb000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 00 00 add %al,(%rax)
2: e9 19 de ff ff jmp 0xffffde20
7: e8 f1 4f 73 fd call 0xfd734ffd
c: 48 8b 44 24 28 mov 0x28(%rsp),%rax
11: 48 8d 58 70 lea 0x70(%rax),%rbx
15: 48 89 d8 mov %rbx,%rax
18: 48 c1 e8 03 shr $0x3,%rax
1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
23: fc ff df
* 26: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction
2a: 84 c0 test %al,%al
2c: 0f 85 0d 09 00 00 jne 0x93f
32: 44 8b 23 mov (%rbx),%r12d
35: 4c rex.WR
36: 8b .byte 0x8b
37: b4 24 mov $0x24,%ah
39: b0 00 mov $0x0,%al