6.6-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan+linaro@kernel.org
commit 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d upstream.
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 johan+linaro@kernel.org Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/bluetooth/btqca.c | 38 ++++++++++++++++++++++++++++++++------ 1 file changed, 32 insertions(+), 6 deletions(-)
--- a/drivers/bluetooth/btqca.c +++ b/drivers/bluetooth/btqca.c @@ -268,9 +268,10 @@ int qca_send_pre_shutdown_cmd(struct hci } 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 hc
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 hc 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 hc 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 hc 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 hc 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 hc 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 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;