mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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123 lines
3.9 KiB
Diff
123 lines
3.9 KiB
Diff
From fc2ae27eb9721a0ce050c2062734fec545cda604 Mon Sep 17 00:00:00 2001
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From: Zhen Kong <zkong@codeaurora.org>
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Date: Thu, 20 Oct 2016 17:34:20 -0700
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Subject: qseecom: check buffer size when loading firmware images
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Make change in __qseecom_load_fw() and qseecom_load_commonlib_image()
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to check buffer size before copying img to buffer.
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CRs-fixed: 1080290
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Change-Id: I0f48666ac948a9571e249598ae7cc19df9036b1d
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Signed-off-by: Zhen Kong <zkong@codeaurora.org>
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---
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drivers/misc/qseecom.c | 32 +++++++++++++++++++++++++++-----
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1 file changed, 27 insertions(+), 5 deletions(-)
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diff --git a/drivers/misc/qseecom.c b/drivers/misc/qseecom.c
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index 061bc99..dc20841 100644
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--- a/drivers/misc/qseecom.c
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+++ b/drivers/misc/qseecom.c
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@@ -3590,7 +3590,7 @@ static bool __qseecom_is_fw_image_valid(const struct firmware *fw_entry)
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return true;
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}
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-static int __qseecom_get_fw_size(char *appname, uint32_t *fw_size,
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+static int __qseecom_get_fw_size(const char *appname, uint32_t *fw_size,
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uint32_t *app_arch)
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{
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int ret = -1;
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@@ -3628,14 +3628,21 @@ static int __qseecom_get_fw_size(char *appname, uint32_t *fw_size,
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}
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pr_debug("QSEE %s app, arch %u\n", appname, *app_arch);
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release_firmware(fw_entry);
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+ fw_entry = NULL;
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for (i = 0; i < num_images; i++) {
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memset(fw_name, 0, sizeof(fw_name));
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snprintf(fw_name, ARRAY_SIZE(fw_name), "%s.b%02d", appname, i);
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ret = request_firmware(&fw_entry, fw_name, qseecom.pdev);
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if (ret)
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goto err;
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+ if (*fw_size > U32_MAX - fw_entry->size) {
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+ pr_err("QSEE %s app file size overflow\n", appname);
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+ ret = -EINVAL;
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+ goto err;
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+ }
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*fw_size += fw_entry->size;
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release_firmware(fw_entry);
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+ fw_entry = NULL;
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}
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return ret;
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@@ -3646,8 +3653,9 @@ err:
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return ret;
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}
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-static int __qseecom_get_fw_data(char *appname, u8 *img_data,
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- struct qseecom_load_app_ireq *load_req)
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+static int __qseecom_get_fw_data(const char *appname, u8 *img_data,
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+ uint32_t fw_size,
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+ struct qseecom_load_app_ireq *load_req)
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{
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int ret = -1;
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int i = 0, rc = 0;
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@@ -3667,6 +3675,12 @@ static int __qseecom_get_fw_data(char *appname, u8 *img_data,
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}
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load_req->img_len = fw_entry->size;
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+ if (load_req->img_len > fw_size) {
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+ pr_err("app %s size %zu is larger than buf size %u\n",
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+ appname, fw_entry->size, fw_size);
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+ ret = -EINVAL;
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+ goto err;
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+ }
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memcpy(img_data_ptr, fw_entry->data, fw_entry->size);
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img_data_ptr = img_data_ptr + fw_entry->size;
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load_req->mdt_len = fw_entry->size; /*Get MDT LEN*/
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@@ -3685,6 +3699,7 @@ static int __qseecom_get_fw_data(char *appname, u8 *img_data,
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goto err;
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}
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release_firmware(fw_entry);
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+ fw_entry = NULL;
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for (i = 0; i < num_images; i++) {
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snprintf(fw_name, ARRAY_SIZE(fw_name), "%s.b%02d", appname, i);
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ret = request_firmware(&fw_entry, fw_name, qseecom.pdev);
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@@ -3692,10 +3707,17 @@ static int __qseecom_get_fw_data(char *appname, u8 *img_data,
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pr_err("Failed to locate blob %s\n", fw_name);
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goto err;
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}
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+ if ((fw_entry->size > U32_MAX - load_req->img_len) ||
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+ (fw_entry->size + load_req->img_len > fw_size)) {
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+ pr_err("Invalid file size for %s\n", fw_name);
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+ ret = -EINVAL;
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+ goto err;
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+ }
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memcpy(img_data_ptr, fw_entry->data, fw_entry->size);
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img_data_ptr = img_data_ptr + fw_entry->size;
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load_req->img_len += fw_entry->size;
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release_firmware(fw_entry);
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+ fw_entry = NULL;
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}
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return ret;
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err:
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@@ -3800,7 +3822,7 @@ static int __qseecom_load_fw(struct qseecom_dev_handle *data, char *appname)
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if (ret)
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return ret;
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- ret = __qseecom_get_fw_data(appname, img_data, &load_req);
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+ ret = __qseecom_get_fw_data(appname, img_data, fw_size, &load_req);
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if (ret) {
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ret = -EIO;
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goto exit_free_img_data;
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@@ -3921,7 +3943,7 @@ static int qseecom_load_commonlib_image(struct qseecom_dev_handle *data,
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if (ret)
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return -EIO;
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- ret = __qseecom_get_fw_data(cmnlib_name, img_data, &load_req);
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+ ret = __qseecom_get_fw_data(cmnlib_name, img_data, fw_size, &load_req);
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if (ret) {
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ret = -EIO;
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goto exit_free_img_data;
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--
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cgit v1.1
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