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 616FA33ADB8; Fri, 9 Jan 2026 11:49:22 +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=1767959362; cv=none; b=UOTwMl9nWdEiFngivl6D3a2zE6EdESqmA4/SV3ClsicNM8awl61cMkjJrO/l8APYQaAhq6XeXgFV56w2pYg0zB6xQnZQvk9HYmx9RgOuxuXSOUSrYG4LNheXSMOZQeTRy4YiggLeveK1HCUyNXJuR09DOJ0I3xRVAD0oG9sV7cw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767959362; c=relaxed/simple; bh=mdewbb1zpa17el0pL/ctn55xmulYKswNC7KVnlbF604=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OERs8EyE3ga+gCOgEcNTO9SlF1dIpKvO41dxPnN+FKIVuryV9hFN+htC+cVwcxJHFX2sFB4p5Ww3bF+koZSRH/oJwseULgufs+TGxVVVkHLN7CA0GoTCAmhbgx6FaIYgPUCCv5cUW+moNeeNfEjsu4/RzQZ5kDAkYtLn+DL2pmU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wb75WUkX; 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="wb75WUkX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9AC66C4CEF1; Fri, 9 Jan 2026 11:49:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767959362; bh=mdewbb1zpa17el0pL/ctn55xmulYKswNC7KVnlbF604=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wb75WUkX2HlM4u5p1njTKaMQl8x5wBZCCll0C16TmFBeTSMEBjgqZejpNzlYlYRKi 699FUcxW00YS+/M7mHfy6Rb1ZnSiOyac3J46E0/l/+gAHTb5C/CNAYy/ETcLYCNqZD Zz8lZDxe2pMM+15UtvCq8fJMS+YiYLlJi17XWlL8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hilda Wu , Nial Ni , Max Chou , Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 6.6 025/737] Bluetooth: btrtl: Avoid loading the config file on security chips Date: Fri, 9 Jan 2026 12:32:44 +0100 Message-ID: <20260109112134.942801630@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112133.973195406@linuxfoundation.org> References: <20260109112133.973195406@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Max Chou [ Upstream commit cd8dbd9ef600435439bb0e70af0a1d9e2193aecb ] For chips with security enabled, it's only possible to load firmware with a valid signature pattern. If key_id is not zero, it indicates a security chip, and the driver will not load the config file. - Example log for a security chip. Bluetooth: hci0: RTL: examining hci_ver=0c hci_rev=000a lmp_ver=0c lmp_subver=8922 Bluetooth: hci0: RTL: rom_version status=0 version=1 Bluetooth: hci0: RTL: btrtl_initialize: key id 1 Bluetooth: hci0: RTL: loading rtl_bt/rtl8922au_fw.bin Bluetooth: hci0: RTL: cfg_sz 0, total sz 71301 Bluetooth: hci0: RTL: fw version 0x41c0c905 - Example log for a normal chip. Bluetooth: hci0: RTL: examining hci_ver=0c hci_rev=000a lmp_ver=0c lmp_subver=8922 Bluetooth: hci0: RTL: rom_version status=0 version=1 Bluetooth: hci0: RTL: btrtl_initialize: key id 0 Bluetooth: hci0: RTL: loading rtl_bt/rtl8922au_fw.bin Bluetooth: hci0: RTL: loading rtl_bt/rtl8922au_config.bin Bluetooth: hci0: RTL: cfg_sz 6, total sz 71307 Bluetooth: hci0: RTL: fw version 0x41c0c905 Tested-by: Hilda Wu Signed-off-by: Nial Ni Signed-off-by: Max Chou Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- drivers/bluetooth/btrtl.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c index 24dae5440c036..3d995790a5071 100644 --- a/drivers/bluetooth/btrtl.c +++ b/drivers/bluetooth/btrtl.c @@ -49,7 +49,7 @@ #define RTL_CHIP_SUBVER (&(struct rtl_vendor_cmd) {{0x10, 0x38, 0x04, 0x28, 0x80}}) #define RTL_CHIP_REV (&(struct rtl_vendor_cmd) {{0x10, 0x3A, 0x04, 0x28, 0x80}}) -#define RTL_SEC_PROJ (&(struct rtl_vendor_cmd) {{0x10, 0xA4, 0x0D, 0x00, 0xb0}}) +#define RTL_SEC_PROJ (&(struct rtl_vendor_cmd) {{0x10, 0xA4, 0xAD, 0x00, 0xb0}}) #define RTL_PATCH_SNIPPETS 0x01 #define RTL_PATCH_DUMMY_HEADER 0x02 @@ -513,7 +513,6 @@ static int rtlbt_parse_firmware_v2(struct hci_dev *hdev, { struct rtl_epatch_header_v2 *hdr; int rc; - u8 reg_val[2]; u8 key_id; u32 num_sections; struct rtl_section *section; @@ -528,14 +527,7 @@ static int rtlbt_parse_firmware_v2(struct hci_dev *hdev, .len = btrtl_dev->fw_len - 7, /* Cut the tail */ }; - rc = btrtl_vendor_read_reg16(hdev, RTL_SEC_PROJ, reg_val); - if (rc < 0) - return -EIO; - key_id = reg_val[0]; - - rtl_dev_dbg(hdev, "%s: key id %u", __func__, key_id); - - btrtl_dev->key_id = key_id; + key_id = btrtl_dev->key_id; hdr = rtl_iov_pull_data(&iov, sizeof(*hdr)); if (!hdr) @@ -1049,6 +1041,8 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev, u16 hci_rev, lmp_subver; u8 hci_ver, lmp_ver, chip_type = 0; int ret; + int rc; + u8 key_id; u8 reg_val[2]; btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL); @@ -1159,6 +1153,14 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev, goto err_free; } + rc = btrtl_vendor_read_reg16(hdev, RTL_SEC_PROJ, reg_val); + if (rc < 0) + goto err_free; + + key_id = reg_val[0]; + btrtl_dev->key_id = key_id; + rtl_dev_info(hdev, "%s: key id %u", __func__, key_id); + btrtl_dev->fw_len = -EIO; if (lmp_subver == RTL_ROM_LMP_8852A && hci_rev == 0x000c) { snprintf(fw_name, sizeof(fw_name), "%s_v2.bin", @@ -1181,7 +1183,7 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev, goto err_free; } - if (btrtl_dev->ic_info->cfg_name) { + if (btrtl_dev->ic_info->cfg_name && !btrtl_dev->key_id) { if (postfix) { snprintf(cfg_name, sizeof(cfg_name), "%s-%s.bin", btrtl_dev->ic_info->cfg_name, postfix); -- 2.51.0