commit 903ae5b679864a778c58558bb8e4dd88b579842c
author Petteri Aimonen <jpa@git.mail.kapsi.fi> Sat Feb 01 21:17:47 2020 +0200
committer Petteri Aimonen <jpa@git.mail.kapsi.fi> Sat Feb 01 21:17:47 2020 +0200
tree 05bb74e78ce1dc79216a89171051fddf90f51738
parent e382ea5c2bb38179e4a8a57464cd97a04653b1df

Avoid overflows in testcase malloc_wrappers

tests/common/malloc_wrappers.c

diff --git a/tests/common/malloc_wrappers.c b/tests/common/malloc_wrappers.c
index 2cfde9d..3f2cc38 100644
--- a/tests/common/malloc_wrappers.c
+++ b/tests/common/malloc_wrappers.c
@@ -31,7 +31,7 @@
 {
     char *buf = NULL;
 
-    if (g_alloc_bytes + size <= g_max_alloc_bytes)
+    if (size <= g_max_alloc_bytes - g_alloc_bytes)
     {
         buf = malloc(size + GUARD_SIZE);
     }
@@ -89,7 +89,7 @@
         assert(g_alloc_count > 0);
         assert(g_alloc_bytes >= oldsize);
 
-        if (g_alloc_bytes - oldsize + size <= g_max_alloc_bytes)
+        if (size <= g_max_alloc_bytes - (g_alloc_bytes - oldsize))
         {
             buf = realloc(buf, size + GUARD_SIZE);
         }