From: Dimitrian <dimitrian.tkachenko@gmail.com>
Date: Tue, 7 Feb 2023 21:12:29 +0000 (-0500)
Subject: Fix number of bytes to be zeroed when spawn entity
X-Git-Tag: xonotic-v0.8.6~2^2
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=8aa262081d3a0837d15616e7cf82d2e1bb2745ca;p=xonotic%2Fgmqcc.git

Fix number of bytes to be zeroed when spawn entity

In `qcvm` when zeroing memory for new entitydata wrong number of bytes used.
This leads to crash with the error:`malloc(): invalid size (unsorted)`.

Use `prog->entityfields * sizeof(qcint_t)`
instead of `sz * sizeof(qcint_t)`.
---

diff --git a/exec.cpp b/exec.cpp
index 387923f..7c82d64 100644
--- a/exec.cpp
+++ b/exec.cpp
@@ -212,7 +212,7 @@ static qcint_t prog_spawn_entity(qc_program_t *prog) {
     size_t sz = prog->entitydata.size();
     prog->entitydata.resize(sz + prog->entityfields);
     data = (char*)&prog->entitydata[sz];
-    memset(data, 0, sz * sizeof(qcint_t));
+    memset(data, 0, prog->entityfields * sizeof(qcint_t));
 
     return e;
 }