From eab2dc37ee457191583c5d9ff26ce9d7ccda3637 Mon Sep 17 00:00:00 2001
From: Patrick Wildt <patrick@blueri.se>
Date: Sun, 25 Mar 2018 19:54:03 +0200
Subject: [PATCH] efi_loader: initialize device path on alloc

Since the backing memory for a new device path can contain stale
data we have to make sure that we zero the buffer.  Otherwise some
code paths that don't set all fields in a structure backed by this
device path might contain unwanted stale data.

Signed-off-by: Patrick Wildt <patrick@blueri.se>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 lib/efi_loader/efi_device_path.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 2262782..ab28b2f 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -66,6 +66,7 @@ static void *dp_alloc(size_t sz)
 		return NULL;
 	}
 
+	memset(buf, 0, sz);
 	return buf;
 }