From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Wed, 12 Jun 2019 21:28:42 +0000 (+0200)
Subject: efi_loader: parameter checks SetVariable()
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-logo.png?a=commitdiff_plain;h=c77d8e9d893ea06082e3ea0f609895b306db1623;p=u-boot.git

efi_loader: parameter checks SetVariable()

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>
---

diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index e56053194d..1d1b23b0e5 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -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;