From: patchwork-bot+netdevbpf@kernel.org
To: Yizhou Zhao <zhaoyz24@mails.tsinghua.edu.cn>
Cc: netdev@vger.kernel.org, alex.aring@gmail.com,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, horms@kernel.org,
linux-bluetooth@vger.kernel.org, linux-wpan@vger.kernel.org,
linux-kernel@vger.kernel.org, yangyx22@mails.tsinghua.edu.cn,
wangao@seu.edu.cn, fengxw06@126.com, qli01@tsinghua.edu.cn,
xuke@tsinghua.edu.cn
Subject: Re: [PATCH net] 6lowpan: fix off-by-one in multicast context address compression
Date: Tue, 02 Jun 2026 02:30:05 +0000 [thread overview]
Message-ID: <178036740541.211970.3874244656503204922.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260527081806.42747-1-zhaoyz24@mails.tsinghua.edu.cn>
Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Wed, 27 May 2026 16:18:01 +0800 you wrote:
> The second memcpy in lowpan_iphc_mcast_ctx_addr_compress() uses
> &data[1] as destination and &ipaddr->s6_addr[11] as source, but
> both should be offset by one: &data[2] and &ipaddr->s6_addr[12]
> respectively.
>
> This off-by-one has two consequences:
> 1. data[1] is overwritten with s6_addr[11], corrupting the RIID
> field in the compressed multicast address
> 2. data[5] is never written, so uninitialized kernel stack memory
> is transmitted over the network via lowpan_push_hc_data(),
> leaking kernel stack contents
>
> [...]
Here is the summary with links:
- [net] 6lowpan: fix off-by-one in multicast context address compression
https://git.kernel.org/netdev/net/c/2a58899d1100
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
prev parent reply other threads:[~2026-06-02 2:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-27 8:18 [PATCH net] 6lowpan: fix off-by-one in multicast context address compression Yizhou Zhao
2026-05-31 22:41 ` Alexander Aring
2026-06-02 2:30 ` patchwork-bot+netdevbpf [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=178036740541.211970.3874244656503204922.git-patchwork-notify@kernel.org \
--to=patchwork-bot+netdevbpf@kernel.org \
--cc=alex.aring@gmail.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=fengxw06@126.com \
--cc=horms@kernel.org \
--cc=kuba@kernel.org \
--cc=linux-bluetooth@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-wpan@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=qli01@tsinghua.edu.cn \
--cc=wangao@seu.edu.cn \
--cc=xuke@tsinghua.edu.cn \
--cc=yangyx22@mails.tsinghua.edu.cn \
--cc=zhaoyz24@mails.tsinghua.edu.cn \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox