mirror of
https://github.com/Fishwaldo/u-boot.git
synced 2025-03-18 21:21:37 +00:00
efi_loader: remove limit on variable length
The EFI spec does not provide a length limit for variables. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
parent
fbba2f6776
commit
dcdb64f7f5
1 changed files with 30 additions and 22 deletions
|
@ -44,10 +44,7 @@
|
|||
* converted to utf16?
|
||||
*/
|
||||
|
||||
#define MAX_VAR_NAME 31
|
||||
#define MAX_NATIVE_VAR_NAME \
|
||||
(strlen("efi_xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxxxx_") + \
|
||||
(MAX_VAR_NAME * MAX_UTF8_PER_UTF16))
|
||||
#define PREFIX_LEN (strlen("efi_xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxxxx_"))
|
||||
|
||||
static int hex(int ch)
|
||||
{
|
||||
|
@ -101,18 +98,20 @@ static char *mem2hex(char *hexstr, const u8 *mem, int count)
|
|||
return hexstr;
|
||||
}
|
||||
|
||||
static efi_status_t efi_to_native(char *native, u16 *variable_name,
|
||||
static efi_status_t efi_to_native(char **native, const u16 *variable_name,
|
||||
efi_guid_t *vendor)
|
||||
{
|
||||
size_t len;
|
||||
char *pos;
|
||||
|
||||
len = u16_strlen((u16 *)variable_name);
|
||||
if (len >= MAX_VAR_NAME)
|
||||
return EFI_DEVICE_ERROR;
|
||||
len = PREFIX_LEN + utf16_utf8_strlen(variable_name) + 1;
|
||||
*native = malloc(len);
|
||||
if (!*native)
|
||||
return EFI_OUT_OF_RESOURCES;
|
||||
|
||||
native += sprintf(native, "efi_%pUl_", vendor);
|
||||
native = (char *)utf16_to_utf8((u8 *)native, (u16 *)variable_name, len);
|
||||
*native = '\0';
|
||||
pos = *native;
|
||||
pos += sprintf(pos, "efi_%pUl_", vendor);
|
||||
utf16_utf8_strcpy(&pos, variable_name);
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
@ -168,7 +167,7 @@ efi_status_t EFIAPI efi_get_variable(u16 *variable_name, efi_guid_t *vendor,
|
|||
u32 *attributes, efi_uintn_t *data_size,
|
||||
void *data)
|
||||
{
|
||||
char native_name[MAX_NATIVE_VAR_NAME + 1];
|
||||
char *native_name;
|
||||
efi_status_t ret;
|
||||
unsigned long in_size;
|
||||
const char *val, *s;
|
||||
|
@ -180,13 +179,14 @@ efi_status_t EFIAPI efi_get_variable(u16 *variable_name, efi_guid_t *vendor,
|
|||
if (!variable_name || !vendor || !data_size)
|
||||
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
||||
|
||||
ret = efi_to_native(native_name, variable_name, vendor);
|
||||
ret = efi_to_native(&native_name, variable_name, vendor);
|
||||
if (ret)
|
||||
return EFI_EXIT(ret);
|
||||
|
||||
debug("%s: get '%s'\n", __func__, native_name);
|
||||
|
||||
val = env_get(native_name);
|
||||
free(native_name);
|
||||
if (!val)
|
||||
return EFI_EXIT(EFI_NOT_FOUND);
|
||||
|
||||
|
@ -256,35 +256,41 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name, efi_guid_t *vendor,
|
|||
u32 attributes, efi_uintn_t data_size,
|
||||
void *data)
|
||||
{
|
||||
char native_name[MAX_NATIVE_VAR_NAME + 1];
|
||||
char *native_name = NULL, *val = NULL, *s;
|
||||
efi_status_t ret = EFI_SUCCESS;
|
||||
char *val, *s;
|
||||
u32 attr;
|
||||
|
||||
EFI_ENTRY("\"%ls\" %pUl %x %zu %p", variable_name, vendor, attributes,
|
||||
data_size, data);
|
||||
|
||||
if (!variable_name || !vendor)
|
||||
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
||||
if (!variable_name || !vendor) {
|
||||
ret = EFI_INVALID_PARAMETER;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = efi_to_native(native_name, variable_name, vendor);
|
||||
ret = efi_to_native(&native_name, variable_name, vendor);
|
||||
if (ret)
|
||||
return EFI_EXIT(ret);
|
||||
goto out;
|
||||
|
||||
#define ACCESS_ATTR (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)
|
||||
|
||||
if ((data_size == 0) || !(attributes & ACCESS_ATTR)) {
|
||||
/* delete the variable: */
|
||||
env_set(native_name, NULL);
|
||||
return EFI_EXIT(EFI_SUCCESS);
|
||||
ret = EFI_SUCCESS;
|
||||
goto out;
|
||||
}
|
||||
|
||||
val = env_get(native_name);
|
||||
if (val) {
|
||||
parse_attr(val, &attr);
|
||||
|
||||
if (attr & READ_ONLY)
|
||||
return EFI_EXIT(EFI_WRITE_PROTECTED);
|
||||
if (attr & READ_ONLY) {
|
||||
/* We should not free val */
|
||||
val = NULL;
|
||||
ret = EFI_WRITE_PROTECTED;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
val = malloc(2 * data_size + strlen("{ro,run,boot}(blob)") + 1);
|
||||
|
@ -320,6 +326,8 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name, efi_guid_t *vendor,
|
|||
if (env_set(native_name, val))
|
||||
ret = EFI_DEVICE_ERROR;
|
||||
|
||||
out:
|
||||
free(native_name);
|
||||
free(val);
|
||||
|
||||
return EFI_EXIT(ret);
|
||||
|
|
Loading…
Add table
Reference in a new issue