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From: patchwork-bot+netdevbpf@kernel.org
To: Eric Dumazet <edumazet@kernel.org>
Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com,
	willemb@google.com, dsahern@kernel.org, idosch@nvidia.com,
	horms@kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH net] ipmr: clear skb->cb[] in reg_vif_xmit()
Date: Mon, 26 Oct 2026 23:50:06 +0000	[thread overview]
Message-ID: <179305860607.3465814.14170093135033685897.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20261025111337.142787-1-edumazet@kernel.org>

Hello:

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

On Sun, 25 Oct 2026 12:13:37 +0100 you wrote:
> reg_vif_xmit() hands the skb to ipmr_cache_report() as an
> IGMPMSG_WHOLEPKT report. When the mroute socket has IP_PKTINFO
> enabled, ipmr_cache_report() calls ipv4_pktinfo_prepare() on the
> original skb, which reads skb->cb[] as IPCB.
> 
> By the time the pimreg device transmits the packet, skb->cb[] is not
> IPCB anymore: qdisc_pkt_len_init() overwrites IPCB(skb)->iif with
> qdisc_skb_cb(skb)->pkt_len, and any qdisc installed on the device or a
> tc BPF program writing skb->cb[] fills the area holding the IP options
> and IPCB(skb)->flags.
> 
> [...]

Here is the summary with links:
  - [net] ipmr: clear skb->cb[] in reg_vif_xmit()
    https://git.kernel.org/netdev/net/c/389952e8776a

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html



      parent reply	other threads:[~2026-10-26 23:50 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-25 11:13 [PATCH net] ipmr: clear skb->cb[] in reg_vif_xmit() Eric Dumazet
2026-10-25 11:28 ` Ido Schimmel
2026-10-26  6:03 ` Hangbin Liu
2026-10-26 23:50 ` patchwork-bot+netdevbpf [this message]

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