[webkit-changes] [WebKit/WebKit] 9edf42: Cherry-pick 260115 at main (397fe12d87a4). https://bu...

[jjgriego]

  Branch: refs/heads/webkitglib/2.38
  Home:   https://github.com/WebKit/WebKit
  Commit: 9edf42d5fc1147294c1b438a7e3272db15107371
      https://github.com/WebKit/WebKit/commit/9edf42d5fc1147294c1b438a7e3272db15107371
  Author: Joseph Griego <jgriego at igalia.com>
  Date:   2023-02-14 (Tue, 14 Feb 2023)

  Changed paths:
    M Source/bmalloc/bmalloc/DebugHeap.cpp

  Log Message:
  -----------
  Cherry-pick 260115 at main (397fe12d87a4). https://bugs.webkit.org/show_bug.cgi?id=252053

    bmalloc DebugHeap should not crash in low-memory conditions on Linux
    https://bugs.webkit.org/show_bug.cgi?id=252053

    Reviewed by Yusuke Suzuki.

    `posix_memalign` may not initialize the result pointer if it fails on Linux [1].

    If we don't initialize the result ourselves, this manifests as later
    segfaults/bus errors/bizarre behavior as we get a completely bogus result that
    can point basically anywhere.

    [1] https://man7.org/linux/man-pages/man3/posix_memalign.3.html

    * Source/bmalloc/bmalloc/DebugHeap.cpp:
    (bmalloc::DebugHeap::memalign):

    Canonical link: https://commits.webkit.org/260115@main