From b800d1bb10723ee56cf1177194d810a1d364accc Mon Sep 17 00:00:00 2001
From: Axel Burri <axel@tty0.ch>
Date: Sun, 20 Nov 2022 15:49:31 +0100
Subject: [PATCH] btrbk: strict input validation from kdf backend

---
 btrbk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/btrbk b/btrbk
index bc0387c..2c7e4dc 100755
--- a/btrbk
+++ b/btrbk
@@ -1760,7 +1760,7 @@ sub btrfs_send_to_file($$$;$$)
             if(/^KEY=([0-9a-fA-f]+)/) {
               $kdf_session_key = $1;
             }
-            elsif(/^([a-z_]+)=(.*)/) {
+            elsif(/^([a-z_]+)=($raw_info_value_match)/) {
               my $info_key = 'kdf_' . $1;
               my $info_val = $2;
               DEBUG "Adding raw_info from kdf_backend: $info_key=$info_val";