Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 UID: 0 PID: 14271 Comm: syz.3.2290 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:skb_segment+0x2ace/0x3f90 net/core/skbuff.c:4806
Code: 00 00 00 8b 6c 24 58 81 7c 24 14 ff ff 00 00 0f 85 12 e1 ff ff e8 62 47 4f f8 48 8b 44 24 20 48 8d 58 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 14 09 00 00 8b 1b e9 17 e1 ff ff e8 39
RSP: 0018:ffffc900000060d0 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88802bf29e40
RDX: 0000000000000100 RSI: ffff888029e828ee RDI: 000000000000ffff
RBP: 0000000000000003 R08: ffff88802bf29e40 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: ffff888029e828e0
R13: 00000000fffffff8 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007f31efaab6c0(0000) GS:ffff8881257a8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000002f000 CR3: 000000005ed6c000 CR4: 00000000003526f0
Call Trace:
tcp_gso_segment+0x423/0x1a40 net/ipv4/tcp_offload.c:180
ipv6_gso_segment+0xb78/0x21a0 net/ipv6/ip6_offload.c:154
skb_mac_gso_segment+0x31f/0x640 net/core/gso.c:53
__skb_gso_segment+0x376/0x540 net/core/gso.c:124
skb_gso_segment include/net/gso.h:83 [inline]
validate_xmit_skb+0x8de/0x1270 net/core/dev.c:3997
__dev_queue_xmit+0x1612/0x3b50 net/core/dev.c:4755
dev_queue_xmit include/linux/netdevice.h:3368 [inline]
neigh_hh_output include/net/neighbour.h:531 [inline]
neigh_output include/net/neighbour.h:545 [inline]
ip6_finish_output2+0xf70/0x1480 net/ipv6/ip6_output.c:136
NF_HOOK_COND include/linux/netfilter.h:307 [inline]
ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247
NF_HOOK include/linux/netfilter.h:318 [inline]
ip6_xmit+0x11b5/0x1970 net/ipv6/ip6_output.c:371
inet6_csk_xmit+0x4db/0x780 net/ipv6/inet6_connection_sock.c:120
__tcp_transmit_skb+0x2092/0x3aa0 net/ipv4/tcp_output.c:1628
tcp_transmit_skb net/ipv4/tcp_output.c:1646 [inline]
tcp_write_xmit+0x19c1/0x69a0 net/ipv4/tcp_output.c:2988
__tcp_push_pending_frames+0x97/0x360 net/ipv4/tcp_output.c:3171
tcp_push_pending_frames include/net/tcp.h:2220 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5862 [inline]
tcp_rcv_established+0x13c8/0x2670 net/ipv4/tcp_input.c:6432
tcp_v6_do_rcv+0xa9d/0x13f0 net/ipv6/tcp_ipv6.c:1652
tcp_v6_rcv+0x21e8/0x2a70 net/ipv6/tcp_ipv6.c:1922
ip6_protocol_deliver_rcu+0xcb0/0x15c0 net/ipv6/ip6_input.c:438
ip6_input_finish+0x191/0x370 net/ipv6/ip6_input.c:489
NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:500
NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
__netif_receive_skb_one_core net/core/dev.c:6078 [inline]
__netif_receive_skb+0xd3/0x380 net/core/dev.c:6191
process_backlog+0x60e/0x14f0 net/core/dev.c:6543
__napi_poll+0xc7/0x360 net/core/dev.c:7593
napi_poll net/core/dev.c:7656 [inline]
net_rx_action+0x707/0xe30 net/core/dev.c:7783
handle_softirqs+0x286/0x870 kernel/softirq.c:622
do_softirq+0xec/0x180 kernel/softirq.c:523
__local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:450
sk_wait_data+0x1fe/0x4a0 net/core/sock.c:3231
tcp_recvmsg_locked+0xd53/0x3650 net/ipv4/tcp.c:2774
tcp_recvmsg+0x210/0x810 net/ipv4/tcp.c:2925
inet6_recvmsg+0x138/0x6b0 net/ipv6/af_inet6.c:678
sock_recvmsg_nosec net/socket.c:1065 [inline]
sock_recvmsg+0x105/0x270 net/socket.c:1087
____sys_recvmsg+0x1c9/0x460 net/socket.c:2837
___sys_recvmsg+0x1b5/0x510 net/socket.c:2879
__sys_recvmsg net/socket.c:2912 [inline]
__do_sys_recvmsg net/socket.c:2918 [inline]
__se_sys_recvmsg net/socket.c:2915 [inline]
__x64_sys_recvmsg+0x198/0x260 net/socket.c:2915
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31eeb8eec9
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:00007f31efaab038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f31eede6090 RCX: 00007f31eeb8eec9
RDX: 0000000040000110 RSI: 00002000000008c0 RDI: 0000000000000006
RBP: 00007f31eec11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f31eede6128 R14: 00007f31eede6090 R15: 00007ffe0ccd7648
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_segment+0x2ace/0x3f90 net/core/skbuff.c:4806
Code: 00 00 00 8b 6c 24 58 81 7c 24 14 ff ff 00 00 0f 85 12 e1 ff ff e8 62 47 4f f8 48 8b 44 24 20 48 8d 58 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 14 09 00 00 8b 1b e9 17 e1 ff ff e8 39
RSP: 0018:ffffc900000060d0 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88802bf29e40
RDX: 0000000000000100 RSI: ffff888029e828ee RDI: 000000000000ffff
RBP: 0000000000000003 R08: ffff88802bf29e40 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: ffff888029e828e0
R13: 00000000fffffff8 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007f31efaab6c0(0000) GS:ffff8881257a8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000002f000 CR3: 000000005ed6c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 8b 6c 24 58 mov 0x58(%rsp),%ebp
6: 81 7c 24 14 ff ff 00 cmpl $0xffff,0x14(%rsp)
d: 00
e: 0f 85 12 e1 ff ff jne 0xffffe126
14: e8 62 47 4f f8 call 0xf84f477b
19: 48 8b 44 24 20 mov 0x20(%rsp),%rax
1e: 48 8d 58 70 lea 0x70(%rax),%rbx
22: 48 89 d8 mov %rbx,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 0f 85 14 09 00 00 jne 0x94a
36: 8b 1b mov (%rbx),%ebx
38: e9 17 e1 ff ff jmp 0xffffe154
3d: e8 .byte 0xe8
3e: 39 .byte 0x39