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-rw-r--r--extensions/libipt_LOG.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/extensions/libipt_LOG.c b/extensions/libipt_LOG.c
index 74d6555..5e5d3fd 100644
--- a/extensions/libipt_LOG.c
+++ b/extensions/libipt_LOG.c
@@ -143,6 +143,10 @@ parse(int c, char **argv, int invert, unsigned int *flags,
"Maximum prefix length %u for --log-prefix",
(unsigned int)sizeof(loginfo->prefix) - 1);
+ if (strlen(optarg) != strlen(strtok(optarg, "\n")))
+ exit_error(PARAMETER_PROBLEM,
+ "Newlines not allowed in --log-prefix");
+
strcpy(loginfo->prefix, optarg);
*flags |= IPT_LOG_OPT_PREFIX;
break;