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 10D2C1419AD; Tue, 27 Feb 2024 13:54:37 +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=1709042077; cv=none; b=SrIIYBnWYnzcyz1KGjZexL6YWLwhN2V5mC4fCbuBQREVCtJKyY/DblBrof4p7Y/hyTEEnaqE9iRpYb0kXySfcXzwcQd+Z1Fh5AUWrHk8s/uilUkUCziuAxIgUkHtYeqd4yqw4LgZD/xiTlPBWL8oOfhojK7Q27zV3IWmT9VB1A4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709042077; c=relaxed/simple; bh=7rp+rQP3QUn857yvspbNXCfQrFN89qdHrrG50ePXdUM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XpyRFkKCEXThIgATmHzCUKMdBqDyRCuaIcPlnumw11StL6MsyfYf1jtB4CPtC7AG5TRsgfhjrGa0mg9iI80FzEFxI6efk1L0XTwggc99v9AToRWY3FPvlYHBzSFB3wpgXAoKZlwOW8kAul6mr/Y6SD3cjSH/2eOLIrjEmEfKamc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ylQNSaNe; 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="ylQNSaNe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D2ADC433F1; Tue, 27 Feb 2024 13:54:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1709042076; bh=7rp+rQP3QUn857yvspbNXCfQrFN89qdHrrG50ePXdUM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ylQNSaNemHwgVYNrRHGyoIaQsAU+qbsxgQdKViQK714fe8CHwbK1FhsK9gxXebU5p oyY73pwVRNcGxpzyh0mqR59UbtTBR8WYiPpBg4CLOvVtGNaV8foQJlZZPgYLfsws8l ug2VT+vyvCo8HnQLku5OT2nvaizrp232axlaLlNM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, zhenwei pi , "Michael S. Tsirkin" , Jason Wang , Herbert Xu , Nathan Chancellor Subject: [PATCH 6.6 171/299] crypto: virtio/akcipher - Fix stack overflow on memcpy Date: Tue, 27 Feb 2024 14:24:42 +0100 Message-ID: <20240227131631.346983624@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240227131625.847743063@linuxfoundation.org> References: <20240227131625.847743063@linuxfoundation.org> User-Agent: quilt/0.67 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: zhenwei pi commit c0ec2a712daf133d9996a8a1b7ee2d4996080363 upstream. sizeof(struct virtio_crypto_akcipher_session_para) is less than sizeof(struct virtio_crypto_op_ctrl_req::u), copying more bytes from stack variable leads stack overflow. Clang reports this issue by commands: make -j CC=clang-14 mrproper >/dev/null 2>&1 make -j O=/tmp/crypto-build CC=clang-14 allmodconfig >/dev/null 2>&1 make -j O=/tmp/crypto-build W=1 CC=clang-14 drivers/crypto/virtio/ virtio_crypto_akcipher_algs.o Fixes: 59ca6c93387d ("virtio-crypto: implement RSA algorithm") Link: https://lore.kernel.org/all/0a194a79-e3a3-45e7-be98-83abd3e1cb7e@roeck-us.net/ Cc: Signed-off-by: zhenwei pi Tested-by: Nathan Chancellor # build Acked-by: Michael S. Tsirkin Acked-by: Jason Wang Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/virtio/virtio_crypto_akcipher_algs.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c +++ b/drivers/crypto/virtio/virtio_crypto_akcipher_algs.c @@ -104,7 +104,8 @@ static void virtio_crypto_dataq_akcipher } static int virtio_crypto_alg_akcipher_init_session(struct virtio_crypto_akcipher_ctx *ctx, - struct virtio_crypto_ctrl_header *header, void *para, + struct virtio_crypto_ctrl_header *header, + struct virtio_crypto_akcipher_session_para *para, const uint8_t *key, unsigned int keylen) { struct scatterlist outhdr_sg, key_sg, inhdr_sg, *sgs[3]; @@ -128,7 +129,7 @@ static int virtio_crypto_alg_akcipher_in ctrl = &vc_ctrl_req->ctrl; memcpy(&ctrl->header, header, sizeof(ctrl->header)); - memcpy(&ctrl->u, para, sizeof(ctrl->u)); + memcpy(&ctrl->u.akcipher_create_session.para, para, sizeof(*para)); input = &vc_ctrl_req->input; input->status = cpu_to_le32(VIRTIO_CRYPTO_ERR);