regexec: check xrealloc return value

"Unchecked return value of 'xrealloc' that is later used to in
pointer arithmetic and can lead to undefined behaviour."

Id: 16

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>

diff --git a/src/regexec.c b/src/regexec.c
index c0626efd43b6ed410bb8dcdc86fc4e477b60c74f..09b3a395a11ca934705514642bf72a5fb2bd93e5 100644 (file)
--- a/src/regexec.c
+++ b/src/regexec.c
@@ -277,7 +277,9 @@ onig_region_copy(OnigRegion* to, OnigRegion* from)
   }
   else if (to->allocated < from->num_regs) {
     to->beg = (int* )xrealloc(to->beg, RREGC_SIZE);
+    if (IS_NULL(to->beg)) return;
     to->end = (int* )xrealloc(to->end, RREGC_SIZE);
+    if (IS_NULL(to->end)) return;
     to->allocated = from->num_regs;
   }