From: patchwork-bot+netdevbpf@kernel.org
To: Dave Seddon <dave.seddon.ca@gmail.com>
Cc: netdev@vger.kernel.org, stephen@networkplumber.org, dsahern@kernel.org
Subject: Re: [PATCH iproute2 v2] libnetlink: zero padding in rta_addattr_l()
Date: Mon, 09 Nov 2026 17:50:08 +0000 [thread overview]
Message-ID: <179424660867.3393623.8324863272464754349.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20261109164116.2637408-1-dave.seddon.ca@gmail.com>
Hello:
This patch was applied to iproute2/iproute2.git (main)
by Stephen Hemminger <stephen@networkplumber.org>:
On Mon, 9 Nov 2026 08:41:16 -0800 you wrote:
> rta_addattr_l() copies alen bytes but advances the parent by
> RTA_ALIGN(len), so the 1-3 padding bytes are never written. This affects
> every caller that passes an unaligned length. Nests built in stack
> buffers (lwtunnel encap, RTA_MULTIPATH, RTA_METRICS) then send those
> bytes to the kernel. For example, in
>
> ip nexthop add id 53 encap mpls 101 ttl 10 via 192.0.2.1 dev d0
>
> [...]
Here is the summary with links:
- [iproute2,v2] libnetlink: zero padding in rta_addattr_l()
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=c5b76cbbfefd
You are awesome, thank you!
--
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prev parent reply other threads:[~2026-11-09 17:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 16:41 [PATCH iproute2 v2] libnetlink: zero padding in rta_addattr_l() Dave Seddon
2026-11-09 17:50 ` patchwork-bot+netdevbpf [this message]
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