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>

diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 22627824f05dd0190e7c42290035289b08609c17..ab28b2fd257cdfaefe3201b55160f7d9c9135f46 100644 (file)
--- 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;
 }