From 4330d7715f8b9d1dbadf7bcbfc9cf5ee9943e24f Mon Sep 17 00:00:00 2001
From: TanakaYasen <pxfgod@gmail.com>
Date: Sat, 17 Jan 2026 10:06:06 +0000
Subject: [PATCH] fix stunking in LeadingZeros over a jumbo vm section which
 dontdump (e.g. made by asan)

---
 src/elfcore.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/elfcore.cc b/src/elfcore.cc
index c6a436d..2a7138e 100644
--- a/src/elfcore.cc
+++ b/src/elfcore.cc
@@ -906,7 +906,7 @@ static int CreateElfCore(void *handle, ssize_t (*writer)(void *, const void *, s
           mappings[i].flags = (mappings[i].flags >> 1) & PF_MASK;
 
           /* Skip leading zeroed pages (as found in the stack segment)       */
-          if ((mappings[i].flags & PF_R) && !is_device) {
+          if ((mappings[i].flags & PF_R) && !is_device && !dontdump) {
             zeros = LeadingZeros(loopback, (void *)mappings[i].start_address,
                                  mappings[i].end_address - mappings[i].start_address, pagesize);
             mappings[i].start_address += zeros;