From 87e6f0008870a9e6a78041c4b6c6d7fc6f856264 Mon Sep 17 00:00:00 2001
From: Peter van Dijk <peter.van.dijk@powerdns.com>
Date: Thu, 10 Mar 2022 17:35:59 +0100
Subject: [PATCH] auth, rec, dnsdist: check strftime return value for logging
 timestamps

---
 pdns/dolog.hh  | 4 +++-
 pdns/logger.cc | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/pdns/dolog.hh b/pdns/dolog.hh
index fd6097dd10..3c5237a5bd 100644
--- a/pdns/dolog.hh
+++ b/pdns/dolog.hh
@@ -103,7 +103,9 @@ void genlog(int level, const char* s, Args... args)
     time_t t;
     time(&t);
     localtime_r(&t, &tm);
-    strftime(buffer, sizeof(buffer), "%b %d %H:%M:%S ", &tm);
+    if (strftime(buffer, sizeof(buffer), "%b %d %H:%M:%S ", &tm) == 0) {
+      buffer[0] = '\0';
+    }
     std::cout<<buffer;
   }
 #endif
diff --git a/pdns/logger.cc b/pdns/logger.cc
index c2a2de2cac..8d34e1ca4c 100644
--- a/pdns/logger.cc
+++ b/pdns/logger.cc
@@ -62,7 +62,9 @@ void Logger::log(const string& msg, Urgency u) noexcept
       time_t t;
       time(&t);
       localtime_r(&t, &tm);
-      strftime(buffer, sizeof(buffer), "%b %d %H:%M:%S ", &tm);
+      if (strftime(buffer, sizeof(buffer), "%b %d %H:%M:%S ", &tm) == 0) {
+        buffer[0] = '\0';
+      }
     }
 
     string prefix;
-- 
2.47.2