From 4f8b0c7e3e9e64a136a5047cd5b6a449155f5439 Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@intel.com>
Date: Thu, 15 Jun 2023 15:16:42 -0700
Subject: [PATCH] QProcess/Unix: disable vfork() under ASan

Change-Id: I443cf0c8a76243eead33fffd1768ee771eca2d56
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
(cherry picked from commit 94ec17436cbdab52ed85e15ea197b538541b14ca)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/corelib/io/qprocess_unix.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/corelib/io/qprocess_unix.cpp b/src/corelib/io/qprocess_unix.cpp
index c93bd0e8745..65836966897 100644
--- a/src/corelib/io/qprocess_unix.cpp
+++ b/src/corelib/io/qprocess_unix.cpp
@@ -511,6 +511,10 @@ static QString resolveExecutable(const QString &program)
 
 static int useForkFlags(const QProcessPrivate::UnixExtras *unixExtras)
 {
+#if defined(__SANITIZE_ADDRESS__) || __has_feature(address_sanitizer)
+    // ASan writes to global memory, so we mustn't use vfork().
+    return FFD_USE_FORK;
+#endif
 #if defined(Q_OS_LINUX) && !QT_CONFIG(forkfd_pidfd)
     // some broken environments are known to have problems with the new Linux
     // API, so we have a way for users to opt-out during configure time (see