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efi_loader: efi_setup_loaded_image() handle missing file name

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This is a preparatory patch.

efi_dp_split_file_path() is used to create device_path and file_path
from file_path for efi_setup_loaded_image().
In a special case, however, of HARDWARE_DEVICE/MEMORY, it doesn't
work expectedly since this path doesn't contain any FILE_PATH sub-type.

This patch makes a workaround.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>

Adjust the logic such that for all paths that do no end on a media file
path we return NULL as file_path.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
AKASHI Takahiro 2019-04-16 17:39:26 +02:00 committed by Heinrich Schuchardt
parent 6c5f8dd540
commit f86076d885
1 changed files with 4 additions and 3 deletions
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7
lib/efi_loader/efi_device_path.c
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@ -917,14 +917,14 @@ struct efi_device_path *efi_dp_from_mem(uint32_t memory_type,
*
* @full_path: device path including device and file path
* @device_path: path of the device
* @file_path: relative path of the file
* @file_path: relative path of the file or NULL if there is none
* Return: status code
*/
efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
struct efi_device_path **device_path,
struct efi_device_path **file_path)
{
struct efi_device_path *p, *dp, *fp;
struct efi_device_path *p, *dp, *fp = NULL;
*device_path = NULL;
*file_path = NULL;
@ -935,7 +935,7 @@ efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
while (!EFI_DP_TYPE(p, MEDIA_DEVICE, FILE_PATH)) {
p = efi_dp_next(p);
if (!p)
return EFI_INVALID_PARAMETER;
goto out;
}
fp = efi_dp_dup(p);
if (!fp)
@ -944,6 +944,7 @@ efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
p->sub_type = DEVICE_PATH_SUB_TYPE_END;
p->length = sizeof(*p);
out:
*device_path = dp;
*file_path = fp;
return EFI_SUCCESS;