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efi_loader: copy GUID in InstallProtocolInterface()

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InstallProtocolInterface() is called with a pointer to the protocol GUID.
There is not guarantee that the memory used by the caller for the protocol
GUID stays allocated. To play it safe the GUID should be copied to U-Boot's
internal structures.

Reported-by: Joerie de Gram <j.de.gram@gmail.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2022-03-09 19:56:23 +01:00
parent f95104825a
commit 66028930da
3 changed files with 9 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
include/efi_loader.h
View file

@ -342,7 +342,7 @@ struct efi_open_protocol_info_item {
*/
struct efi_handler {
struct list_head link;
const efi_guid_t *guid;
const efi_guid_t guid;
void *protocol_interface;
struct list_head open_infos;
};

14
lib/efi_loader/efi_boottime.c
View file

@ -552,7 +552,7 @@ efi_status_t efi_search_protocol(const efi_handle_t handle,
struct efi_handler *protocol;
protocol = list_entry(lhandle, struct efi_handler, link);
if (!guidcmp(protocol->guid, protocol_guid)) {
if (!guidcmp(&protocol->guid, protocol_guid)) {
if (handler)
*handler = protocol;
return EFI_SUCCESS;
@ -604,7 +604,7 @@ efi_status_t efi_remove_all_protocols(const efi_handle_t handle)
list_for_each_entry_safe(protocol, pos, &efiobj->protocols, link) {
efi_status_t ret;
ret = efi_remove_protocol(handle, protocol->guid,
ret = efi_remove_protocol(handle, &protocol->guid,
protocol->protocol_interface);
if (ret != EFI_SUCCESS)
return ret;
@ -1131,7 +1131,7 @@ efi_status_t efi_add_protocol(const efi_handle_t handle,
handler = calloc(1, sizeof(struct efi_handler));
if (!handler)
return EFI_OUT_OF_RESOURCES;
handler->guid = protocol;
memcpy((void *)&handler->guid, protocol, sizeof(efi_guid_t));
handler->protocol_interface = protocol_interface;
INIT_LIST_HEAD(&handler->open_infos);
list_add_tail(&handler->link, &efiobj->protocols);
@ -1227,7 +1227,7 @@ static efi_status_t efi_get_drivers(efi_handle_t handle,
/* Count all driver associations */
list_for_each_entry(handler, &handle->protocols, link) {
if (protocol && guidcmp(handler->guid, protocol))
if (protocol && guidcmp(&handler->guid, protocol))
continue;
list_for_each_entry(item, &handler->open_infos, link) {
if (item->info.attributes &
@ -1249,7 +1249,7 @@ static efi_status_t efi_get_drivers(efi_handle_t handle,
return EFI_OUT_OF_RESOURCES;
/* Collect unique driver handles */
list_for_each_entry(handler, &handle->protocols, link) {
if (protocol && guidcmp(handler->guid, protocol))
if (protocol && guidcmp(&handler->guid, protocol))
continue;
list_for_each_entry(item, &handler->open_infos, link) {
if (item->info.attributes &
@ -2446,7 +2446,7 @@ static efi_status_t EFIAPI efi_protocols_per_handle(
protocol = list_entry(protocol_handle,
struct efi_handler, link);
(*protocol_buffer)[j] = (void *)protocol->guid;
(*protocol_buffer)[j] = (void *)&protocol->guid;
++j;
}
}
@ -3094,7 +3094,7 @@ close_next:
(efi_handle_t)image_obj)
continue;
r = EFI_CALL(efi_close_protocol
(efiobj, protocol->guid,
(efiobj, &protocol->guid,
info->info.agent_handle,
info->info.controller_handle
));

2
lib/efi_loader/efi_image_loader.c
View file

@ -91,7 +91,7 @@ void efi_print_image_infos(void *pc)
list_for_each_entry(efiobj, &efi_obj_list, link) {
list_for_each_entry(handler, &efiobj->protocols, link) {
if (!guidcmp(handler->guid, &efi_guid_loaded_image)) {
if (!guidcmp(&handler->guid, &efi_guid_loaded_image)) {
efi_print_image_info(
(struct efi_loaded_image_obj *)efiobj,
handler->protocol_interface, pc);