From patchwork Tue Apr 30 17:07:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 793818 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 1CB8117164E; Tue, 30 Apr 2024 17:08:50 +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=1714496931; cv=none; b=qdWCy35DgAeW4XC+w2tPVSLlBxPsKw5oZl9k7zzyi+uatIUoTAsOgmtawNJNKZMEGnwnyLiDeUCYm11vXLXbdlh1XEiQnD9xY6H6z9yGoQfg5u9BPB4DwheS60aL5vvMe/TNoDySGCdPHSVcH/82J/W64oMq+wtXdnQWqanh5SA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714496931; c=relaxed/simple; bh=e0/6a8zI7qlfmUzhIdgSTDIhViQTmWLkZY4lOE8TrGY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LVEOm1DV17EyKeqDWlr4mCh7OI4ytta3xu9YDnL9pV9ZOrfTJwRieSv8VqKlZ5YiTnfqriwmcuOEbXEXkwoVEszV5n29nHoVGMgMHhZIF/Yhi8yQUjeiJSOfoVdEvNeHeF32KpBcaCsDiW/yoSzr8WYzMIA8gwiv3ilm8I9vSfs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aMygWH51; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aMygWH51" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3808C4AF14; Tue, 30 Apr 2024 17:08:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714496930; bh=e0/6a8zI7qlfmUzhIdgSTDIhViQTmWLkZY4lOE8TrGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aMygWH51AQDO8JXpP9CSUNV6DlRygTjpidNiAX95vt9fPYWmcW2VGeJCvQQP+vfwx IkkRBDO2ZS3h+KAdV1XyvUw+64syEd9VQCdoeqqBYFH3bNf7618NeQqXDDBgQ57ZZ+ rMRsehAI3u0bj0kAmBE07NkeAz/RqcHOL81GyirCnLHo4f8XXurmfsj/xkbkzRfudC GjfM7Uoe4l10c0DZmDgav5K1H1lqB2uR4MGPD7PhshUabmoopkdTpkxCcDxQozKD5A t0irnv0wek/qE7m5a6lqyImPfE9ZeCoyIXT0xOjHuhUIC+u/dxeuEYJukdDPZwRGMg EqAAV9uwnuOqg== Received: from johan by xi.lan with local (Exim 4.97.1) (envelope-from ) id 1s1qyK-0000000047S-2qZF; Tue, 30 Apr 2024 19:08:52 +0200 From: Johan Hovold To: Marcel Holtmann , Luiz Augusto von Dentz Cc: Doug Anderson , Janaki Ramaiah Thota , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable@vger.kernel.org Subject: [PATCH v2 1/3] Bluetooth: qca: add missing firmware sanity checks Date: Tue, 30 Apr 2024 19:07:39 +0200 Message-ID: <20240430170741.15742-2-johan+linaro@kernel.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240430170741.15742-1-johan+linaro@kernel.org> References: <20240430170741.15742-1-johan+linaro@kernel.org> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add the missing sanity checks when parsing the firmware files before downloading them to avoid accessing and corrupting memory beyond the vmalloced buffer. Fixes: 83e81961ff7e ("Bluetooth: btqca: Introduce generic QCA ROME support") Cc: stable@vger.kernel.org # 4.10 Signed-off-by: Johan Hovold --- drivers/bluetooth/btqca.c | 38 ++++++++++++++++++++++++++++++++------ 1 file changed, 32 insertions(+), 6 deletions(-) diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c index cfa71708397b..6743b0a79d7a 100644 --- a/drivers/bluetooth/btqca.c +++ b/drivers/bluetooth/btqca.c @@ -268,9 +268,10 @@ int qca_send_pre_shutdown_cmd(struct hci_dev *hdev) } EXPORT_SYMBOL_GPL(qca_send_pre_shutdown_cmd); -static void qca_tlv_check_data(struct hci_dev *hdev, +static int qca_tlv_check_data(struct hci_dev *hdev, struct qca_fw_config *config, - u8 *fw_data, enum qca_btsoc_type soc_type) + u8 *fw_data, size_t fw_size, + enum qca_btsoc_type soc_type) { const u8 *data; u32 type_len; @@ -286,6 +287,9 @@ static void qca_tlv_check_data(struct hci_dev *hdev, switch (config->type) { case ELF_TYPE_PATCH: + if (fw_size < 7) + return -EINVAL; + config->dnld_mode = QCA_SKIP_EVT_VSE_CC; config->dnld_type = QCA_SKIP_EVT_VSE_CC; @@ -294,6 +298,9 @@ static void qca_tlv_check_data(struct hci_dev *hdev, bt_dev_dbg(hdev, "File version : 0x%x", fw_data[6]); break; case TLV_TYPE_PATCH: + if (fw_size < sizeof(struct tlv_type_hdr) + sizeof(struct tlv_type_patch)) + return -EINVAL; + tlv = (struct tlv_type_hdr *)fw_data; type_len = le32_to_cpu(tlv->type_len); tlv_patch = (struct tlv_type_patch *)tlv->data; @@ -333,6 +340,9 @@ static void qca_tlv_check_data(struct hci_dev *hdev, break; case TLV_TYPE_NVM: + if (fw_size < sizeof(struct tlv_type_hdr)) + return -EINVAL; + tlv = (struct tlv_type_hdr *)fw_data; type_len = le32_to_cpu(tlv->type_len); @@ -341,17 +351,26 @@ static void qca_tlv_check_data(struct hci_dev *hdev, BT_DBG("TLV Type\t\t : 0x%x", type_len & 0x000000ff); BT_DBG("Length\t\t : %d bytes", length); + if (fw_size < length + (tlv->data - fw_data)) + return -EINVAL; + idx = 0; data = tlv->data; - while (idx < length) { + while (idx < length - sizeof(struct tlv_type_nvm)) { tlv_nvm = (struct tlv_type_nvm *)(data + idx); tag_id = le16_to_cpu(tlv_nvm->tag_id); tag_len = le16_to_cpu(tlv_nvm->tag_len); + if (length < idx + sizeof(struct tlv_type_nvm) + tag_len) + return -EINVAL; + /* Update NVM tags as needed */ switch (tag_id) { case EDL_TAG_ID_HCI: + if (tag_len < 3) + return -EINVAL; + /* HCI transport layer parameters * enabling software inband sleep * onto controller side. @@ -367,6 +386,9 @@ static void qca_tlv_check_data(struct hci_dev *hdev, break; case EDL_TAG_ID_DEEP_SLEEP: + if (tag_len < 1) + return -EINVAL; + /* Sleep enable mask * enabling deep sleep feature on controller. */ @@ -375,14 +397,16 @@ static void qca_tlv_check_data(struct hci_dev *hdev, break; } - idx += (sizeof(u16) + sizeof(u16) + 8 + tag_len); + idx += sizeof(struct tlv_type_nvm) + tag_len; } break; default: BT_ERR("Unknown TLV type %d", config->type); - break; + return -EINVAL; } + + return 0; } static int qca_tlv_send_segment(struct hci_dev *hdev, int seg_size, @@ -532,7 +556,9 @@ static int qca_download_firmware(struct hci_dev *hdev, memcpy(data, fw->data, size); release_firmware(fw); - qca_tlv_check_data(hdev, config, data, soc_type); + ret = qca_tlv_check_data(hdev, config, data, size, soc_type); + if (ret) + return ret; segment = data; remain = size;