Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 1 UID: 0 PID: 27666 Comm: syz.3.7755 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:skb_segment+0x2b3f/0x4030 net/core/skbuff.c:4880
Code: 44 8b bc 24 a0 00 00 00 81 7c 24 1c ff ff 00 00 0f 85 dd e0 ff ff e8 b0 07 4f f8 48 8b 04 24 48 8d 58 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 1a 09 00 00 44 8b 33 48 8b 9c 24 b0 00
RSP: 0000:ffffc90000a072c8 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88805d9e0000
RDX: 0000000000000100 RSI: ffff8880675c57ee RDI: 000000000000ffff
RBP: 000000000000004a R08: ffff88805d9e0000 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88805bc901b0 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff888125564000(0063) knlGS:00000000f5415b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5414ff4 CR3: 00000000833c6000 CR4: 00000000003526f0
DR0: 0000000000000004 DR1: 00000000000801f8 DR2: 0000000000000007
DR3: 0000000000000003 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
tcp_gso_segment+0x424/0x1a40 net/ipv4/tcp_offload.c:181
ipv6_gso_segment+0xb38/0x1840 net/ipv6/ip6_offload.c:135
skb_mac_gso_segment+0x31c/0x690 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+0xa21/0x14a0 net/core/dev.c:4022
validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4072
sch_direct_xmit+0xdf/0x4c0 net/sched/sch_generic.c:332
qdisc_restart net/sched/sch_generic.c:412 [inline]
__qdisc_run+0xa95/0x15d0 net/sched/sch_generic.c:420
qdisc_run include/net/pkt_sched.h:120 [inline]
__dev_xmit_skb net/core/dev.c:4269 [inline]
__dev_queue_xmit+0x1bad/0x3890 net/core/dev.c:4802
NF_HOOK_COND include/linux/netfilter.h:307 [inline]
ip6_output+0x340/0x550 net/ipv6/ip6_output.c:246
NF_HOOK include/linux/netfilter.h:318 [inline]
ip6_xmit+0x1149/0x1980 net/ipv6/ip6_output.c:358
inet6_csk_xmit+0x3bd/0x6c0 net/ipv6/inet6_connection_sock.c:115
__tcp_transmit_skb+0x249b/0x43e0 net/ipv4/tcp_output.c:1693
tcp_transmit_skb net/ipv4/tcp_output.c:1711 [inline]
tcp_write_xmit+0x16e8/0x6980 net/ipv4/tcp_output.c:3064
__tcp_push_pending_frames+0x97/0x380 net/ipv4/tcp_output.c:3247
tcp_push_pending_frames include/net/tcp.h:2284 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:6139 [inline]
tcp_rcv_established+0xfd8/0x2740 net/ipv4/tcp_input.c:6722
tcp_v6_do_rcv+0x8eb/0x1ba0 net/ipv6/tcp_ipv6.c:1595
tcp_v6_rcv+0x2653/0x2f60 net/ipv6/tcp_ipv6.c:1865
ip6_protocol_deliver_rcu+0xa73/0x1600 net/ipv6/ip6_input.c:438
ip6_input_finish+0x191/0x370 net/ipv6/ip6_input.c:489
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:500
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
__netif_receive_skb_one_core net/core/dev.c:6167 [inline]
__netif_receive_skb net/core/dev.c:6280 [inline]
process_backlog+0x7dd/0x1950 net/core/dev.c:6631
__napi_poll+0xae/0x340 net/core/dev.c:7695
napi_poll net/core/dev.c:7758 [inline]
net_rx_action+0x627/0xf70 net/core/dev.c:7910
handle_softirqs+0x22a/0x870 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+0x20e/0x4d0 net/core/sock.c:3264
tcp_recvmsg_locked+0xd71/0x3600 net/ipv4/tcp.c:2828
tcp_recvmsg+0x213/0x7f0 net/ipv4/tcp.c:2979
inet6_recvmsg+0x13e/0x6c0 net/ipv6/af_inet6.c:678
sock_recvmsg_nosec net/socket.c:1078 [inline]
sock_recvmsg+0x105/0x270 net/socket.c:1100
__sys_recvfrom+0x240/0x3c0 net/socket.c:2256
__compat_sys_recvfrom net/compat.c:389 [inline]
__do_compat_sys_recvfrom net/compat.c:402 [inline]
__se_compat_sys_recvfrom net/compat.c:398 [inline]
__ia32_compat_sys_recvfrom+0xe4/0x100 net/compat.c:398
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307
do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f72f6c
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 58 b8 77 00 00 00 cd 80 0f 0b 90 90 90 90 90 90 b8 ad
RSP: 002b:00000000f541550c EFLAGS: 00000206 ORIG_RAX: 0000000000000173
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000080000080
RDX: 00000000fffffd0b RSI: 00000000c9100120 RDI: 0000000000000000
RBP: 00000000fffffd25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_segment+0x2b3f/0x4030 net/core/skbuff.c:4880
Code: 44 8b bc 24 a0 00 00 00 81 7c 24 1c ff ff 00 00 0f 85 dd e0 ff ff e8 b0 07 4f f8 48 8b 04 24 48 8d 58 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 1a 09 00 00 44 8b 33 48 8b 9c 24 b0 00
RSP: 0000:ffffc90000a072c8 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88805d9e0000
RDX: 0000000000000100 RSI: ffff8880675c57ee RDI: 000000000000ffff
RBP: 000000000000004a R08: ffff88805d9e0000 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88805bc901b0 R15: 0000000000000003
FS: 0000000000000000(0000) GS:ffff888125564000(0063) knlGS:00000000f5415b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5414ff4 CR3: 00000000833c6000 CR4: 00000000003526f0
DR0: 0000000000000004 DR1: 00000000000801f8 DR2: 0000000000000007
DR3: 0000000000000003 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 44 8b bc 24 a0 00 00 mov 0xa0(%rsp),%r15d
7: 00
8: 81 7c 24 1c ff ff 00 cmpl $0xffff,0x1c(%rsp)
f: 00
10: 0f 85 dd e0 ff ff jne 0xffffe0f3
16: e8 b0 07 4f f8 call 0xf84f07cb
1b: 48 8b 04 24 mov (%rsp),%rax
1f: 48 8d 58 70 lea 0x70(%rax),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 1a 09 00 00 jne 0x951
37: 44 8b 33 mov (%rbx),%r14d
3a: 48 rex.W
3b: 8b .byte 0x8b
3c: 9c pushf
3d: 24 b0 and $0xb0,%al