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components/esp-matter: fix len check for long char and do check for

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return value

Also, we should mark the values greater that the expected as invalid and
not the ones with equal to ones.
This commit is contained in:
Shubham Patil
2025-04-23 12:27:23 +05:30
parent 6fc184ee5b
commit e1d72dcf25
1 changed files with 10 additions and 3 deletions
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components/esp_matter/esp_matter_attribute_utils.cpp
+10 -3
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@@ -1272,7 +1272,7 @@ esp_err_t get_data_from_attr_val(esp_matter_attr_val_t *val, EmberAfAttributeTyp
}
size_t string_len = strnlen((const char *)val->val.a.b, val->val.a.s);
size_t data_size_len = val->val.a.t - val->val.a.s;
if (string_len >= UINT8_MAX || data_size_len != 2) {
if (string_len >= UINT16_MAX || data_size_len != 2) {
return ESP_ERR_INVALID_ARG;
}
uint16_t data_size = string_len;
@@ -1928,12 +1928,19 @@ esp_err_t update(uint16_t endpoint_id, uint32_t cluster_id, uint32_t attribute_i
/* Get size */
EmberAfAttributeType attribute_type = 0;
uint16_t attribute_size = 0;
get_data_from_attr_val(val, &attribute_type, &attribute_size, NULL);
esp_err_t err = get_data_from_attr_val(val, &attribute_type, &attribute_size, NULL);
if (err != ESP_OK) {
ESP_LOGE(TAG, "Error getting data from attribute value: %d", err);
if (lock_status == lock::SUCCESS) {
lock::chip_stack_unlock();
}
return err;
}
/* Get value */
uint8_t *value = (uint8_t *)esp_matter_mem_calloc(1, attribute_size);
if (!value) {
ESP_LOGE(TAG, "Could not allocate value buffer");
ESP_LOGE(TAG, "Could not allocate value buffer, size: %u", attribute_size);
if (lock_status == lock::SUCCESS) {
lock::chip_stack_unlock();
}