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: 2939 Comm: syz.6.10395 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:skb_segment+0x2cb9/0x41d0 net/core/skbuff.c:4879
Code: 00 e8 db 48 53 f8 48 8b 6c 24 30 4c 89 64 24 78 4c 8b 64 24 10 e9 54 df ff ff e8 c2 48 53 f8 48 8d 5d 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 8b 6c 24 5c 0f 85 5e 09 00 00 44 8b 33 48 8b
RSP: 0000:ffffc90000a072f0 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff888027f63e00
RDX: 0000000000000100 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 0000000000000000 R08: ffff888027f63e00 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000004a
FS: 0000000000000000(0000) GS:ffff8881253aa000(0063) knlGS:00000000f53ecb40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f53ebff4 CR3: 000000001fb38000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
tcp_gso_segment+0x43c/0x19a0 net/ipv4/tcp_offload.c:181
ipv6_gso_segment+0xb7c/0x18a0 net/ipv6/ip6_offload.c:135
skb_mac_gso_segment+0x31c/0x690 net/core/gso.c:53
__skb_gso_segment+0x371/0x550 net/core/gso.c:124
skb_gso_segment include/net/gso.h:83 [inline]
validate_xmit_skb+0x9fb/0x1460 net/core/dev.c:4039
validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4089
sch_direct_xmit+0xde/0x4c0 net/sched/sch_generic.c:357
qdisc_restart net/sched/sch_generic.c:437 [inline]
__qdisc_run+0xb11/0x1620 net/sched/sch_generic.c:445
qdisc_run include/net/pkt_sched.h:120 [inline]
__dev_xmit_skb net/core/dev.c:4292 [inline]
__dev_queue_xmit+0x1c00/0x37f0 net/core/dev.c:4831
NF_HOOK_COND include/linux/netfilter.h:307 [inline]
ip6_output+0x337/0x540 net/ipv6/ip6_output.c:246
dst_output include/net/dst.h:471 [inline]
NF_HOOK include/linux/netfilter.h:318 [inline]
ip6_xmit+0x117f/0x1a60 net/ipv6/ip6_output.c:379
inet6_csk_xmit+0x397/0x660 net/ipv6/inet6_connection_sock.c:115
__tcp_transmit_skb+0x2640/0x47c0 net/ipv4/tcp_output.c:1716
tcp_transmit_skb net/ipv4/tcp_output.c:1733 [inline]
tcp_write_xmit+0x1bed/0x63f0 net/ipv4/tcp_output.c:3061
__tcp_push_pending_frames+0x96/0x380 net/ipv4/tcp_output.c:3244
tcp_push_pending_frames include/net/tcp.h:2360 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:6075 [inline]
tcp_rcv_established+0xe05/0x2830 net/ipv4/tcp_input.c:6658
tcp_v6_do_rcv+0x88a/0x1c70 net/ipv6/tcp_ipv6.c:1610
tcp_v6_rcv+0x2452/0x2d40 net/ipv6/tcp_ipv6.c:1887
ip6_protocol_deliver_rcu+0xab9/0x1680 net/ipv6/ip6_input.c:479
ip6_input_finish+0x191/0x370 net/ipv6/ip6_input.c:534
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
ip6_input+0x16a/0x270 net/ipv6/ip6_input.c:545
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
__netif_receive_skb_one_core net/core/dev.c:6202 [inline]
__netif_receive_skb net/core/dev.c:6315 [inline]
process_backlog+0x774/0x1860 net/core/dev.c:6666
__napi_poll+0xaa/0x330 net/core/dev.c:7733
napi_poll net/core/dev.c:7796 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:7953
handle_softirqs+0x225/0x840 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:3276
tcp_recvmsg_locked+0xe2d/0x3800 net/ipv4/tcp.c:2795
tcp_recvmsg+0x203/0x7f0 net/ipv4/tcp.c:2945
sock_recvmsg_nosec net/socket.c:1127 [inline]
sock_recvmsg+0xfa/0x1b0 net/socket.c:1148
__sys_recvfrom+0x240/0x3c0 net/socket.c:2304
__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+0x23e/0x6f0 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: 0023:0xf701f0ec
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 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000f53ec50c EFLAGS: 00000206 ORIG_RAX: 0000000000000173
RAX: ffffffffffffffda RBX: 0000000000000005 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+0x2cb9/0x41d0 net/core/skbuff.c:4879
Code: 00 e8 db 48 53 f8 48 8b 6c 24 30 4c 89 64 24 78 4c 8b 64 24 10 e9 54 df ff ff e8 c2 48 53 f8 48 8d 5d 70 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 8b 6c 24 5c 0f 85 5e 09 00 00 44 8b 33 48 8b
RSP: 0000:ffffc90000a072f0 EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff888027f63e00
RDX: 0000000000000100 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 0000000000000000 R08: ffff888027f63e00 R09: 0000000000000002
R10: 000000000000a888 R11: 0000000000000100 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000004a
FS: 0000000000000000(0000) GS:ffff8881253aa000(0063) knlGS:00000000f53ecb40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f53ebff4 CR3: 000000001fb38000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 e8 add %ch,%al
2: db 48 53 fisttpl 0x53(%rax)
5: f8 clc
6: 48 8b 6c 24 30 mov 0x30(%rsp),%rbp
b: 4c 89 64 24 78 mov %r12,0x78(%rsp)
10: 4c 8b 64 24 10 mov 0x10(%rsp),%r12
15: e9 54 df ff ff jmp 0xffffdf6e
1a: e8 c2 48 53 f8 call 0xf85348e1
1f: 48 8d 5d 70 lea 0x70(%rbp),%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: 8b 6c 24 5c mov 0x5c(%rsp),%ebp
35: 0f 85 5e 09 00 00 jne 0x999
3b: 44 8b 33 mov (%rbx),%r14d
3e: 48 rex.W
3f: 8b .byte 0x8b