From ea73dea04c6f6a4f5e98ab88975621314c80d623 Mon Sep 17 00:00:00 2001
From: Herman Semenoff <GermanAizek@yandex.ru>
Date: Sat, 1 Aug 2026 17:14:44 +0300
Subject: [PATCH] sync: fix memleak if realloc() unverified failed (OOM)

realloc() always need check on valid ptr maybe out of memory

References:
- https://stackoverflow.com/questions/21006707/proper-usage-of-realloc
- https://stackoverflow.com/questions/1986538/how-to-handle-realloc-when-it-fails-due-to-memory
---
 disasm/sync.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/disasm/sync.c b/disasm/sync.c
index b086907f8..8431a30d5 100644
--- a/disasm/sync.c
+++ b/disasm/sync.c
@@ -48,11 +48,19 @@ void add_sync(uint64_t pos, uint64_t length)
     if (nsynx >= max_synx) {
         struct Sync *xsynx;
         size_t xmaxsynx = max_synx << 1;
-        if (synx_oom || xmaxsynx < max_synx ||
-            !(xsynx = realloc(synx, (xmaxsynx + 1) * sizeof(*synx)))) {
+        if (synx_oom || xmaxsynx < max_synx) {
             synx_oom = true;
             return;
         }
+
+        xsynx = realloc(synx, (xmaxsynx + 1) * sizeof(*synx));
+        if (!xsynx) {
+            synx_oom = true;
+            return;
+        }
+
+        synx = xsynx;
+        max_synx = xmaxsynx;
     }
 
     nsynx++;