[Webkit-unassigned] [Bug 241386] New: Set protections on MAP_ALIGNED platforms too for WTF::OSAllocator::tryReserveUncommittedAligned

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=241386

            Bug ID: 241386
           Summary: Set protections on MAP_ALIGNED platforms too for
                    WTF::OSAllocator::tryReserveUncommittedAligned
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Template Framework
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: iamleot+webkit-bugzilla at gmail.com

Since 247105 at main when tryReserveUncommittedAligned() on Unix-like platforms that supports MAP_ALIGNED (except macOS and Linux) pages are initially mmap-ed via PROT_NONE but then the protections are never readjusted.

At least in NetBSD running jsc, e.g. via `jsc -e 0', it ends up in a SIGSEGV.

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