netdev - Re: [PATCH net] netfilter: flowtable: account for Ethernet header in nf_flow_pppoe

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Message-Id: 
 <175219382224.1715084.10590390381407848678.git-patchwork-notify@kernel.org>
Date: Fri, 11 Jul 2025 00:30:22 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
 pablo@...filter.org, kadlec@...filter.org, netdev@...r.kernel.org,
 netfilter-devel@...r.kernel.org, coreteam@...filter.org,
 eric.dumazet@...il.com, syzbot+bf6ed459397e307c3ad2@...kaller.appspotmail.com
Subject: Re: [PATCH net] netfilter: flowtable: account for Ethernet header in
 nf_flow_pppoe_proto()

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Mon,  7 Jul 2025 12:45:17 +0000 you wrote:
> syzbot found a potential access to uninit-value in nf_flow_pppoe_proto()
> 
> Blamed commit forgot the Ethernet header.
> 
> BUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27
>   nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27
>   nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
>   nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623
>   nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline]
>   nf_ingress net/core/dev.c:5742 [inline]
>   __netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837
>   __netif_receive_skb_one_core net/core/dev.c:5975 [inline]
>   __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090
>   netif_receive_skb_internal net/core/dev.c:6176 [inline]
>   netif_receive_skb+0x57/0x630 net/core/dev.c:6235
>   tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485
>   tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938
>   tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984
>   new_sync_write fs/read_write.c:593 [inline]
>   vfs_write+0xb4b/0x1580 fs/read_write.c:686
>   ksys_write fs/read_write.c:738 [inline]
>   __do_sys_write fs/read_write.c:749 [inline]
> 
> [...]

Here is the summary with links:
  - [net] netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()
    https://git.kernel.org/netdev/net/c/18cdb3d982da

You are awesome, thank you!
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