From: Mike Pall <mike>
Date: Thu, 18 Apr 2024 23:44:19 +0000 (+0200)
Subject: Fix segment release check in internal memory allocator.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b5e837ac2dfdc0638830c048a47ca9378c504d3;p=thirdparty%2FLuaJIT.git

Fix segment release check in internal memory allocator.

Thanks to Jinji Zeng. #1179 #1157
---

diff --git a/src/lj_alloc.c b/src/lj_alloc.c
index 9adaa0e5..0c0c0c4f 100644
--- a/src/lj_alloc.c
+++ b/src/lj_alloc.c
@@ -975,7 +975,7 @@ static size_t release_unused_segments(mstate m)
       mchunkptr p = align_as_chunk(base);
       size_t psize = chunksize(p);
       /* Can unmap if first chunk holds entire segment and not pinned */
-      if (!cinuse(p) && (char *)p + psize >= base + size - TOP_FOOT_SIZE) {
+      if (!cinuse(p) && (char *)p + psize == (char *)mem2chunk(sp)) {
 	tchunkptr tp = (tchunkptr)p;
 	if (p == m->dv) {
 	  m->dv = 0;