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: 25608 Comm: syz.5.4958 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:skb_segment+0x2ace/0x3f90 net/core/skbuff.c:4847
Code: 00 00 00 8b 6c 24 58 81 7c 24 14 ff ff 00 00 0f 85 12 e1 ff ff e8 f2 b7 8e 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 c9
RSP: 0018:ffffc900000061d0 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff8880464cbd00
RDX: 0000000000000100 RSI: ffff88805e02ba6e RDI: 000000000000ffff
RBP: 0000000000000003 R08: ffff8880464cbd00 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: ffff88805e02ba60
R13: 00000000fffffff8 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007fdf62bf96c0(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdf62bf8f98 CR3: 00000000358c6000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404
DR3: ffffffffefffff18 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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+0xa13/0x1440 net/core/dev.c:4005
validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4055
sch_direct_xmit+0xd3/0x4b0 net/sched/sch_generic.c:332
qdisc_restart net/sched/sch_generic.c:412 [inline]
__qdisc_run+0xa88/0x1510 net/sched/sch_generic.c:420
qdisc_run+0xc7/0x300 include/net/pkt_sched.h:120
__dev_xmit_skb net/core/dev.c:4252 [inline]
__dev_queue_xmit+0x18e3/0x31c0 net/core/dev.c:4785
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:1631
tcp_transmit_skb net/ipv4/tcp_output.c:1649 [inline]
tcp_write_xmit+0x16e8/0x6980 net/ipv4/tcp_output.c:3002
__tcp_push_pending_frames+0x97/0x380 net/ipv4/tcp_output.c:3185
tcp_push_pending_frames include/net/tcp.h:2224 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5896 [inline]
tcp_rcv_established+0xfe6/0x2580 net/ipv4/tcp_input.c:6476
tcp_v6_do_rcv+0x8eb/0x1ba0 net/ipv6/tcp_ipv6.c:1607
tcp_v6_rcv+0x2247/0x2ae0 net/ipv6/tcp_ipv6.c:1877
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:6139 [inline]
__netif_receive_skb+0xd3/0x380 net/core/dev.c:6252
process_backlog+0x54f/0x1340 net/core/dev.c:6604
__napi_poll+0xae/0x320 net/core/dev.c:7668
napi_poll net/core/dev.c:7731 [inline]
net_rx_action+0x64a/0xe00 net/core/dev.c:7883
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
sk_wait_data+0x1fe/0x4a0 net/core/sock.c:3264
tcp_recvmsg_locked+0xd4b/0x3630 net/ipv4/tcp.c:2776
tcp_recvmsg+0x1ff/0x7d0 net/ipv4/tcp.c:2927
inet6_recvmsg+0x138/0x6b0 net/ipv6/af_inet6.c:678
sock_recvmsg_nosec net/socket.c:1078 [inline]
sock_recvmsg+0x105/0x270 net/socket.c:1100
__sys_recvfrom+0x1f6/0x340 net/socket.c:2256
__do_sys_recvfrom net/socket.c:2271 [inline]
__se_sys_recvfrom net/socket.c:2267 [inline]
__x64_sys_recvfrom+0xde/0x100 net/socket.c:2267
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdf61d8f749
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:00007fdf62bf9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
RAX: ffffffffffffffda RBX: 00007fdf61fe6090 RCX: 00007fdf61d8f749
RDX: fffffffffffffd0b RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007fdf61e13f91 R08: 0000000000000000 R09: fffffffffffffd25
R10: 00000000c9100120 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdf61fe6128 R14: 00007fdf61fe6090 R15: 00007fdf6210fa28
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_segment+0x2ace/0x3f90 net/core/skbuff.c:4847
Code: 00 00 00 8b 6c 24 58 81 7c 24 14 ff ff 00 00 0f 85 12 e1 ff ff e8 f2 b7 8e 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 c9
RSP: 0018:ffffc900000061d0 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff8880464cbd00
RDX: 0000000000000100 RSI: ffff88805e02ba6e RDI: 000000000000ffff
RBP: 0000000000000003 R08: ffff8880464cbd00 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: ffff88805e02ba60
R13: 00000000fffffff8 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007fdf62bf96c0(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdf62bf8f98 CR3: 00000000358c6000 CR4: 00000000003526f0
DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404
DR3: ffffffffefffff18 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
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 f2 b7 8e f8 call 0xf88eb80b
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: c9 leave