From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 013114218B5; Wed, 4 Feb 2026 14:55:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770216954; cv=none; b=gYgkaE3IOhJ32sk1zCUBWgxLF8/JRZb8f2eCbsgj2afZ9SxnbkGAvzFGQi/DrE3xjdUpiWla1YSG3uGOR7m83XyEI/IKDtgFx4kiNxsL98Ni8UyZRa6/BUfygaGuT3KWaOA+8gJNtsnHVayRDvGB2nzGa1oG+qC12iBULK9IthE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770216954; c=relaxed/simple; bh=jf53L96F0o03nFGy9WOcg1lIwFt3C5TzeTFrbuokgiY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ElB0VYJMdPgbusEzwxIOHAHEKoMeBwsZYyaPg4/iANmb7K1hjXTEX1Wi4zDtzTp3RXTwBPecuG51V6pRqM/5V/qac3cRXWwIJYTz2hxqgyB7fgWNeXe6ddcY+3b09cgKOC3fc6AHP5HxmzLGKZwOrRtd03n+S1cIM9pNVGBAaAY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Y8EAliTW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Y8EAliTW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7C1B4C4CEF7; Wed, 4 Feb 2026 14:55:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770216953; bh=jf53L96F0o03nFGy9WOcg1lIwFt3C5TzeTFrbuokgiY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y8EAliTWRc8L+nMt40QUrKi1H7XoN9G4d1c9mjPUhy1sOWdUIJWssRNlnrZ3jB5Go y8kvWEMt59YsF19+RouH1IIFdnb2NfSNvga6w39eN98UQfKI5Pe42Df85VLFAlqxDt 1fEa5nCijEgIKfDe85lE7nJunB9RM0Ue7kDkPCHk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Taeyang Lee <0wn@theori.io>, Herbert Xu , Sasha Levin Subject: [PATCH 5.15 081/206] crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec Date: Wed, 4 Feb 2026 15:38:32 +0100 Message-ID: <20260204143901.127628736@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260204143858.193781818@linuxfoundation.org> References: <20260204143858.193781818@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Taeyang Lee <0wn@theori.io> [ Upstream commit 2397e9264676be7794f8f7f1e9763d90bd3c7335 ] authencesn assumes an ESP/ESN-formatted AAD. When assoclen is shorter than the minimum expected length, crypto_authenc_esn_decrypt() can advance past the end of the destination scatterlist and trigger a NULL pointer dereference in scatterwalk_map_and_copy(), leading to a kernel panic (DoS). Add a minimum AAD length check to fail fast on invalid inputs. Fixes: 104880a6b470 ("crypto: authencesn - Convert to new AEAD interface") Reported-By: Taeyang Lee <0wn@theori.io> Signed-off-by: Taeyang Lee <0wn@theori.io> Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- crypto/authencesn.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/crypto/authencesn.c b/crypto/authencesn.c index b60e61b1904cb..6487b35851d54 100644 --- a/crypto/authencesn.c +++ b/crypto/authencesn.c @@ -191,6 +191,9 @@ static int crypto_authenc_esn_encrypt(struct aead_request *req) struct scatterlist *src, *dst; int err; + if (assoclen < 8) + return -EINVAL; + sg_init_table(areq_ctx->src, 2); src = scatterwalk_ffwd(areq_ctx->src, req->src, assoclen); dst = src; @@ -284,6 +287,9 @@ static int crypto_authenc_esn_decrypt(struct aead_request *req) u32 tmp[2]; int err; + if (assoclen < 8) + return -EINVAL; + cryptlen -= authsize; if (req->src != dst) { -- 2.51.0