[sr-dev] git:4.2:fd6dba3b: regex: safety to check to avoid working with zero size allocations

[Daniel-Constantin Mierla]

Module: kamailio
Branch: 4.2
Commit: fd6dba3b9752e9cbf21da2ca7b66b2e5c1dafce7
URL: https://github.com/kamailio/kamailio/commit/fd6dba3b9752e9cbf21da2ca7b66b2e5c1dafce7

Author: Daniel-Constantin Mierla <miconda at gmail.com>
Committer: Daniel-Constantin Mierla <miconda at gmail.com>
Date: 2015-05-19T09:34:50+02:00

regex: safety to check to avoid working with zero size allocations

(cherry picked from commit 5e5866b2ac8390caa9373f49345ed877c6e5f037)

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Modified: modules/regex/regex_mod.c

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Diff:  https://github.com/kamailio/kamailio/commit/fd6dba3b9752e9cbf21da2ca7b66b2e5c1dafce7.diff
Patch: https://github.com/kamailio/kamailio/commit/fd6dba3b9752e9cbf21da2ca7b66b2e5c1dafce7.patch

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diff --git a/modules/regex/regex_mod.c b/modules/regex/regex_mod.c
index 5b8b5cc..4f714b5 100644
--- a/modules/regex/regex_mod.c
+++ b/modules/regex/regex_mod.c
@@ -354,6 +354,11 @@ static int load_pcres(int action)
 	
 	fclose(f);
 	
+	if(num_pcres_tmp==0) {
+		LM_ERR("no expressions in the file\n");
+		goto err;
+	}
+
 	/* Fix the patterns */
 	for (i=0; i < num_pcres_tmp; i++) {