Allocating or deallocating a QJSEngine object causes a crash if the application has called mlockall(MCL_CURRENT|MCL_FUTURE)

    while (madvise(result, bytes, MADV_DONTNEED)) {
        if (errno != EAGAIN)
            CRASH();
    }

SYNOPSIS
       #include <sys/mman.h>

       int madvise(void addr[.length], size_t length, int advice);

ERRORS
       EINVAL advice is MADV_DONTNEED or MADV_REMOVE and the specified address range in‐
              cludes locked, Huge TLB pages, or VM_PFNMAP pages.

#include <sys/mman.h>

#include <QCoreApplication>
#include <QDebug>
#include <QJSEngine>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    qDebug() << QT_VERSION_MAJOR << QT_VERSION_MINOR << QT_VERSION_PATCH;

    // lock memory (as done by for example Pipewire with a typical pro-audio configuration).
    mlockall(MCL_CURRENT|MCL_FUTURE);

    QJSEngine engine;
    // no need to do anything else, we've crashed by now.
    // if we could get past this point, the object destruction would also crash.
}

diff --git a/src/3rdparty/masm/wtf/OSAllocatorPosix.cpp b/src/3rdparty/masm/wtf/OSAllocatorPosix.cpp
index a8990a92b4..484f6c1ca5 100644
--- a/src/3rdparty/masm/wtf/OSAllocatorPosix.cpp
+++ b/src/3rdparty/masm/wtf/OSAllocatorPosix.cpp
@@ -37,6 +37,9 @@
 #include <wtf/UnusedParam.h>

 #if OS(LINUX)
+
+#include <cstdio>
+
 #include <sys/syscall.h>
 #ifndef MFD_CLOEXEC
 #define MFD_CLOEXEC         0x0001U
@@ -114,11 +117,6 @@ void* OSAllocator::reserveUncommitted(size_t bytes, Usage usage, bool writable,
     if (result == MAP_FAILED)
         CRASH();

-    while (madvise(result, bytes, MADV_DONTNEED)) {
-        if (errno != EAGAIN)
-            CRASH();
-    }
-
     if (fd != -1)
         close(fd);
 #else
@@ -250,8 +248,10 @@ void OSAllocator::decommit(void* address, size_t bytes)
     mmap(address, bytes, PROT_NONE, MAP_FIXED | MAP_LAZY | MAP_PRIVATE | MAP_ANON, -1, 0);
 #elif OS(LINUX)
     while (madvise(address, bytes, MADV_DONTNEED)) {
-        if (errno != EAGAIN)
-            CRASH();
+        if (errno != EAGAIN) {
+            perror("wtf::OSAllocator::decommit: madvise");
+            break;
+        }
     }
     if (mprotect(address, bytes, PROT_NONE))
         CRASH();