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efi_loader: parameter checks SetVariable()

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Return EFI_INVALID_PARAMETER if the variable name has zero length or the
variable has runtime access but not boottime access.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-06-12 23:28:42 +02:00
parent 17416eaff2
commit c77d8e9d89
1 changed files with 3 additions and 1 deletions
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4
lib/efi_loader/efi_variable.c
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@ -430,7 +430,9 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
data_size, data);
/* TODO: implement APPEND_WRITE */
if (!variable_name || !vendor ||
if (!variable_name || !*variable_name || !vendor ||
((attributes & EFI_VARIABLE_RUNTIME_ACCESS) &&
!(attributes & EFI_VARIABLE_BOOTSERVICE_ACCESS)) ||
(attributes & EFI_VARIABLE_APPEND_WRITE)) {
ret = EFI_INVALID_PARAMETER;
goto out;