treewide: replace homegrown memory_erase with explicit_bzero

explicit_bzero was added in glibc 2.25. Make use of it.

explicit_bzero is hardcoded to zero the memory, so string erase now
truncates the string, instead of overwriting it with 'x'. This causes
a visible difference only in the journalctl case.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/tty-ask-password-agent/tty-ask-password-agent.c b/src/tty-ask-password-agent/tty-ask-password-agent.c
index b45490be1a..a17c006d57 100644
--- a/src/tty-ask-password-agent/tty-ask-password-agent.c
+++ b/src/tty-ask-password-agent/tty-ask-password-agent.c
@@ -243,7 +243,7 @@ static int ask_password_plymouth(
         r = 0;
 
 finish:
-        memory_erase(buffer, sizeof(buffer));
+        explicit_bzero(buffer, sizeof(buffer));
         return r;
 }
 
@@ -283,7 +283,7 @@ static int send_passwords(const char *socket_name, char **passwords) {
                 r = log_debug_errno(errno, "sendto(): %m");
 
 finish:
-        memory_erase(packet, packet_length);
+        explicit_bzero(packet, packet_length);
         return r;
 }