------------[ cut here ]------------
WARNING: CPU: 1 PID: 25918 at net/core/flow_dissector.c:1027 __skb_flow_dissect+0xb90/0x6b00 net/core/flow_dissector.c:1022
Modules linked in:
CPU: 1 PID: 25918 Comm: sed Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__skb_flow_dissect+0xb90/0x6b00 net/core/flow_dissector.c:1027
Code: 3d c5 1e dc 05 01 0f 85 e4 57 00 00 e8 89 36 53 f9 e9 4c f9 ff ff e8 7f 36 53 f9 48 8b 5c 24 30 e9 87 03 00 00 e8 70 36 53 f9 <0f> 0b 4c 8b 74 24 28 e9 f1 fe ff ff e8 5f 36 53 f9 c6 05 86 1e dc
RSP: 0018:ffffc900001df7e0 EFLAGS: 00010246
RAX: ffffffff882f3c40 RBX: ffffffff882f34ae RCX: ffff88802a68bb80
RDX: 0000000000000100 RSI: ffffffff8adf0f40 RDI: ffffffff8adf0f00
RBP: ffffc900001dfdb8 R08: dffffc0000000000 R09: 1ffffffff215ec48
R10: dffffc0000000000 R11: fffffbfff215ec49 R12: 000000000000007c
R13: 1ffffffff1c40918 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc6ec1ccbc CR3: 00000000342e5000 CR4: 00000000003506e0
Call Trace:
skb_flow_dissect_flow_keys include/linux/skbuff.h:1531 [inline]
___skb_get_hash+0x55/0x710 net/core/flow_dissector.c:1708
__skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1773
skb_get_hash include/linux/skbuff.h:1573 [inline]
nft_trace_init+0x1e0/0x430 net/netfilter/nf_tables_trace.c:292
nft_do_chain+0x1678/0x1730 net/netfilter/nf_tables_core.c:243
nf_route_table_hook6+0x2b6/0x6d0 net/netfilter/nft_chain_route.c:88
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xb9/0x200 net/netfilter/core.c:614
nf_hook include/linux/netfilter.h:257 [inline]
__ip6_local_out+0x780/0x8a0 net/ipv6/output_core.c:149
ip6_local_out+0x26/0x120 net/ipv6/output_core.c:159
ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline]
udp_tunnel6_xmit_skb+0x53a/0x970 net/ipv6/ip6_udp_tunnel.c:109
tipc_udp_xmit+0x589/0xb40 net/tipc/udp_media.c:220
tipc_bearer_xmit_skb+0x2a9/0x3f0 net/tipc/bearer.c:577
tipc_disc_timeout+0x57d/0x6d0 net/tipc/discover.c:338
call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 0f cc 21 f7 65 8b 05 d0 50 cb 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000c60fbc0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: ffb9033027793200
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: 0000000000000001
RBP: ffffc9000c60fc50 R08: ffffffff96e45ecb R09: 1ffffffff2dc8bd9
R10: dffffc0000000000 R11: fffffbfff2dc8bda R12: dffffc0000000000
R13: ffff88804d200ea8 R14: ffffffff96e45ec8 R15: 1ffff920018c1f78
debug_object_activate+0x2f8/0x4f0 lib/debugobjects.c:716
debug_rcu_head_queue kernel/rcu/rcu.h:190 [inline]
call_rcu+0xa2/0x990 kernel/rcu/tree.c:2834
task_work_run+0x1d0/0x260 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f39337d20ba
Code: 41 89 f2 48 89 54 24 e0 41 83 e2 40 75 2a 89 f0 f7 d0 a9 00 00 41 00 74 1f 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 2e c3 0f 1f 44 00 00 48 8d 44 24 08 c7 44 24
RSP: 002b:00007ffc6ec1cbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: fffffffffffffffe RBX: 000055dbe9006534 RCX: 00007f39337d20ba
RDX: 0000000000080000 RSI: 00007f39337da134 RDI: 00000000ffffff9c
RBP: 00007f39337e5bf8 R08: 0000000000000000 R09: 000055dbe9006534
R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffffff
R13: 0000000000000001 R14: 00007f39337e5000 R15: 00007f39337e6700
----------------
Code disassembly (best guess):
0: c7 44 24 20 00 00 00 movl $0x0,0x20(%rsp)
7: 00
8: 9c pushf
9: 8f 44 24 20 pop 0x20(%rsp)
d: f7 44 24 20 00 02 00 testl $0x200,0x20(%rsp)
14: 00
15: 41 c6 04 07 f8 movb $0xf8,(%r15,%rax,1)
1a: 75 4b jne 0x67
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 0f cc 21 f7 call 0xf721cc3e <-- trapping instruction
2f: 65 8b 05 d0 50 cb 75 mov %gs:0x75cb50d0(%rip),%eax # 0x75cb5106
36: 85 c0 test %eax,%eax
38: 74 3c je 0x76
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss