ip6_tables: ip6tables: counters copy to user failed while replacing table ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7513 at net/core/flow_dissector.c:1027 __skb_flow_dissect+0x91c/0x5898 net/core/flow_dissector.c:1022 Modules linked in: CPU: 1 PID: 7513 Comm: syz.6.917 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : __skb_flow_dissect+0x91c/0x5898 net/core/flow_dissector.c:1022 lr : __skb_flow_dissect+0x91c/0x5898 net/core/flow_dissector.c:1022 sp : ffff800022bf5dc0 x29: ffff800022bf6370 x28: ffff0001022a7140 x27: 0000000000000002 x26: ffff800022bf60f0 x25: dfff800000000000 x24: 0000000000000000 x23: 1ffff00002c84a3c x22: 1ffff00002c84a3c x21: ffff8000164251dc x20: 0000000000000000 x19: ffff70000457ebe8 x18: 0000000000000000 x17: ffff800010a9b634 x16: ffff800011bcb318 x15: 0000000000000000 x14: 1ffff00002c84071 x13: dfff800000000000 x12: 0000000000080000 x11: 000000000000316c x10: ffff800023f7c000 x9 : ffff80000fefcd6c x8 : 000000000000316d x7 : ffff80000ff03ba4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff800012222f40 x0 : 0000000000000001 Call trace: __skb_flow_dissect+0x91c/0x5898 net/core/flow_dissector.c:1022 skb_flow_dissect_flow_keys include/linux/skbuff.h:1531 [inline] ___skb_get_hash+0x7c/0x5e0 net/core/flow_dissector.c:1713 __skb_get_hash+0xb8/0x22c net/core/flow_dissector.c:1778 skb_get_hash include/linux/skbuff.h:1573 [inline] nft_trace_init+0x190/0x36c net/netfilter/nf_tables_trace.c:292 nft_do_chain+0x12d4/0x1364 net/netfilter/nf_tables_core.c:243 nft_do_chain_inet+0x20c/0x2ec net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xc8/0x208 net/netfilter/core.c:614 nf_hook include/linux/netfilter.h:257 [inline] __ip6_local_out+0x6c0/0x7dc net/ipv6/output_core.c:149 ip6_local_out+0x3c/0x15c net/ipv6/output_core.c:159 synproxy_send_tcp_ipv6+0x3c4/0x530 net/netfilter/nf_synproxy_core.c:860 synproxy_send_client_synack_ipv6+0x5d0/0x9c8 net/netfilter/nf_synproxy_core.c:906 synproxy_tg6+0x48c/0x658 net/ipv6/netfilter/ip6t_SYNPROXY.c:48 ip6t_do_table+0xb38/0x12a8 net/ipv6/netfilter/ip6_tables.c:368 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xc8/0x208 net/netfilter/core.c:614 nf_hook include/linux/netfilter.h:257 [inline] NF_HOOK+0x1d0/0x36c include/linux/netfilter.h:300 ip6_input net/ipv6/ip6_input.c:492 [inline] ip6_mc_input+0x780/0xb18 net/ipv6/ip6_input.c:586 dst_input include/net/dst.h:466 [inline] ip6_rcv_finish+0x1f4/0x220 net/ipv6/ip6_input.c:79 NF_HOOK+0x2dc/0x36c include/linux/netfilter.h:302 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5620 [inline] __netif_receive_skb+0xd0/0x2b0 net/core/dev.c:5734 netif_receive_skb_internal net/core/dev.c:5820 [inline] netif_receive_skb+0x1e8/0x928 net/core/dev.c:5879 tun_rx_batched+0x4ac/0x600 drivers/net/tun.c:-1 tun_get_user+0x1f70/0x3268 drivers/net/tun.c:2009 tun_chr_write_iter+0xfc/0x200 drivers/net/tun.c:2055 call_write_iter include/linux/fs.h:2271 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x3c8/0x7c8 fs/read_write.c:584 ksys_write+0x12c/0x228 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 449 hardirqs last enabled at (448): [] __local_bh_enable_ip+0x1f8/0x37c kernel/softirq.c:426 hardirqs last disabled at (449): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (362): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (364): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]---