[monitoring-plugins] check_http: Add space for ending NULL byte in ...

[Lorenz Kästle]

 Module: monitoring-plugins
 Branch: fix_1829
 Commit: d3fbcd122012af7733de3b80a692f79ad69057b2
 Author: Lorenz Kästle <12514511+rincewinds...@users.noreply.github.com>
   Date: Mon Jan 30 13:33:46 2023 +0100
    URL: 
https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=d3fbcd1

check_http: Add space for ending NULL byte in array for chunked encoding

---

 plugins/check_http.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/plugins/check_http.c b/plugins/check_http.c
index c23625e..5fa310f 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -1438,7 +1438,8 @@ char *unchunk_content(const char *content) {
     overall_size += length_of_chunk;
 
     if (result == NULL) {
-      result = (char *)calloc(length_of_chunk, sizeof(char));
+      // Size of the chunk plus the ending NULL byte
+      result = (char *)malloc(length_of_chunk +1);
       if (result == NULL) {
         if (verbose) {
           printf("Failed to allocate memory for unchunked body\n");
@@ -1446,7 +1447,8 @@ char *unchunk_content(const char *content) {
         return NULL;
       }
     } else {
-      void *tmp = realloc(result, overall_size);
+      // Enlarge memory to the new size plus the ending NULL byte
+      void *tmp = realloc(result, overall_size +1);
       if (tmp == NULL) {
         if (verbose) {
           printf("Failed to allocate memory for unchunked body\n");