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efi_loader: CloseProtocol in efi_fmp_find

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The CloseProtocol() boot service requires a handle as first argument.
Passing the protocol interface is incorrect.

CloseProtocol() only has an effect if called with a non-zero value for
agent_handle. HandleProtocol() uses an opaque agent_handle when invoking
OpenProtocol() (currently NULL). Therefore HandleProtocol() should be
avoided.

* Replace the LocateHandle() call by efi_search_protocol().
* Remove the CloseProtocol() call.

Fixes: 8d99026f06 ("efi_loader: capsule: support firmware update")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt
2022-10-07 15:29:52 +02:00
parent bb8bb3033e
commit 56c9f0c44e
1 changed files with 6 additions and 8 deletions
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14
lib/efi_loader/efi_capsule.c
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@@ -159,12 +159,14 @@ efi_fmp_find(efi_guid_t *image_type, u8 image_index, u64 instance,
efi_status_t ret;
for (i = 0, handle = handles; i < no_handles; i++, handle++) {
ret = EFI_CALL(efi_handle_protocol(
*handle,
&efi_guid_firmware_management_protocol,
(void **)&fmp));
struct efi_handler *fmp_handler;
ret = efi_search_protocol(
*handle, &efi_guid_firmware_management_protocol,
&fmp_handler);
if (ret != EFI_SUCCESS)
continue;
fmp = fmp_handler->protocol_interface;
/* get device's image info */
info_size = 0;
@@ -215,10 +217,6 @@ efi_fmp_find(efi_guid_t *image_type, u8 image_index, u64 instance,
skip:
efi_free_pool(package_version_name);
free(image_info);
EFI_CALL(efi_close_protocol(
(efi_handle_t)fmp,
&efi_guid_firmware_management_protocol,
NULL, NULL));
if (found)
return fmp;
}