From b853f6e9d60c0eab2038227718ee1ed1266f94de Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 16 Nov 2010 03:23:52 +0100
Subject: [PATCH] cryptsetup: lock ourselves into memory as long as we deal
 with passwords

---
 src/cryptsetup.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/cryptsetup.c b/src/cryptsetup.c
index c007b87c..c103aa9e 100644
--- a/src/cryptsetup.c
+++ b/src/cryptsetup.c
@@ -21,6 +21,7 @@
 
 #include <string.h>
 #include <errno.h>
+#include <sys/mman.h>
 
 #include <libcryptsetup.h>
 
@@ -181,6 +182,9 @@ int main(int argc, char *argv[]) {
                 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-"))
                         parse_options(argv[5]);
 
+                /* A delicious drop of snake oil */
+                mlockall(MCL_FUTURE);
+
                 if ((k = crypt_init(&cd, argv[3]))) {
                         log_error("crypt_init() failed: %s", strerror(-k));
                         goto finish;
-- 
2.39.5