log: protect errno from log_syntax_invalid_utf8_internal()

Potentially, utf8_escape_invalid() called by
log_syntax_invalid_utf8_internal() may update errno.

diff --git a/src/basic/log.c b/src/basic/log.c
index 80789ed2f07a52b3c8769dabb51b64724fa5f463..c3e61ab5d4f33955263053373acf8f00b3650d95 100644 (file)
--- a/src/basic/log.c
+++ b/src/basic/log.c
@@ -1679,6 +1679,7 @@ int log_syntax_invalid_utf8_internal(
                 const char *func,
                 const char *rvalue) {
 
+        PROTECT_ERRNO;
         _cleanup_free_ char *p = NULL;
 
         if (rvalue)