From: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Date: Tue, 26 Jul 2022 05:45:18 +0000 (+0200)
Subject: efi_loader: fix efi_convert_device_path_to_text()
X-Git-Tag: baikal/mips/sdk5.8.2~5^2~250^2~2
X-Git-Url: https://git.baikalelectronics.ru/?a=commitdiff_plain;h=4160e76a3b1a2106a2ef2e28d055530ab1b955e7;p=uboot.git

efi_loader: fix efi_convert_device_path_to_text()

Ensure that the string we convert to UTF-16 is NUL terminated even
if the device path only contains end nodes.

Fixes: 3dc2c11e2c24 ("efi_loader: multi part device paths to text")
Addresses-Coverity: 350434 ("Uninitialized scalar variable")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
---

diff --git a/lib/efi_loader/efi_device_path_to_text.c b/lib/efi_loader/efi_device_path_to_text.c
index 4d73954ef8..6c428ee061 100644
--- a/lib/efi_loader/efi_device_path_to_text.c
+++ b/lib/efi_loader/efi_device_path_to_text.c
@@ -432,6 +432,7 @@ static uint16_t EFIAPI *efi_convert_device_path_to_text(
 		*(u8 **)&device_path += device_path->length;
 	}
 
+	*str = 0;
 	text = efi_str_to_u16(buffer);
 
 out: