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([2a01:e0a:ab7:2110:6a1d:efff:fe52:1959]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a18bf1358asm295619005e9.4.2026.10.12.07.10.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Oct 2026 07:10:51 -0700 (PDT) Message-ID: <893fef96-e6a2-4cad-8100-5b2865aa7605@6wind.com> Date: Mon, 12 Oct 2026 16:10:50 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Reply-To: nicolas.dichtel@6wind.com Subject: Re: [PATCH] xfrm: account XFRMA_IF_ID and XFRMA_OFFLOAD_DEV in msgsize helpers To: Adrian Martinez Garcia , netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org References: From: Nicolas Dichtel Content-Language: en-US Organization: 6WIND In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Le 11/10/2026 à 10:06, Adrian Martinez Garcia a écrit : > Hi, > > The xfrm_acquire_msgsize(), xfrm_polexpire_msgsize() and xfrm_expire_msgsize() > helpers do not account for the XFRMA_IF_ID (8 B) and XFRMA_OFFLOAD_DEV > (12 B) attributes that their sibling builders emit. The deficit of up to > 20 B can trigger BUG_ON(err < 0) in the callers -> latent kernel panic. > > This is a sibling of CVE-2026-43107 (fix 7081d46d32 only corrected the > aevent pair; these three pairs were left unfixed). > > Fixes: 7e6526404ade > Signed-off-by: Adrian Martinez > > I used Claude Code to help with the audit. Please, don't use attachments. Here is the doc about the process: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst#n278 Regards, Nicolas