From 7f2e20627992042577222fcb474a093398a91c30 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 30 Sep 2020 14:41:08 +0200
Subject: Fix possible memory allocation error.

---
 src/drivers/Posix/Fl_Posix_System_Driver.cxx | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/drivers/Posix/Fl_Posix_System_Driver.cxx b/src/drivers/Posix/Fl_Posix_System_Driver.cxx
index 9f255f3d0..0fa037b42 100644
--- a/src/drivers/Posix/Fl_Posix_System_Driver.cxx
+++ b/src/drivers/Posix/Fl_Posix_System_Driver.cxx
@@ -66,8 +66,11 @@ void *Fl_Posix_System_Driver::dlopen(const char *filename)
   ptr = double_dlopen(filename);
 #  ifdef __APPLE_CC__ // allows testing on Darwin + XQuartz + fink
   if (!ptr) {
-    char *f_dylib = fl_strdup(filename);
-    strcpy(strrchr(f_dylib, '.'), ".dylib");
+    char *f_dylib = (char*)malloc(strlen(filename)+7);
+    strcpy(f_dylib, filename);
+    char *p = strrchr(f_dylib, '.');
+    if (!p) p = f_dylib + strlen(f_dylib);
+    strcpy(p, ".dylib");
     char path[FL_PATH_MAX];
     sprintf(path, "/sw/lib/%s", f_dylib);
     ptr = ::dlopen(path, RTLD_LAZY | RTLD_GLOBAL);
-- 
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