Fix various possible integer overflows

1 files changed, 5 insertions, 0 deletions

diff --git a/src/sp_utils.c b/src/sp_utils.c
index a94ab2a..14b7c09 100644
--- a/src/sp_utils.c
+++ b/src/sp_utils.c
@@ -143,6 +143,11 @@ int sp_log_request(const zend_string* folder, const zend_string* text_repr,
 
 static char* zend_string_to_char(const zend_string* zs) {
   // Remove \0 from the middle of a string
+
+  if (ZSTR_LEN(zs) + 1 < ZSTR_LEN(zs)) {
+    sp_log_err("overflow_error", "Overflow tentative detected in zend_string_to_char.");
+    sp_terminate();
+  }
   char* copy = emalloc(ZSTR_LEN(zs) + 1);
 
   copy[ZSTR_LEN(zs)] = 0;