• Paolo Severini's avatar
    Fixing a possible buffer overrun in win64_unwindinfo::InitUnwindingRecord · d4968875
    Paolo Severini authored
    The code that copies code bytes from a MacroAssembler into a buffer in a
    CodeRangeUnwindingRecord struct (used to store stack unwinding data) has an
    error: it copies the whole MacroAssembler buffer size, not just the size of the
    compiled instructions into an "exception thunk" array.
    This has no real bad effects, because a CodeRangeUnwindingRecord is stored at
    the beginning of a page reserved at the beginning of an isolate code range, but
    it is quite bad and we need to fix it.
    
    Bug: v8:3598
    Change-Id: I0df0cf0173561cc939e6431bc0f01ef040fc189e
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1629310Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
    Commit-Queue: Paolo Severini <paolosev@microsoft.com>
    Cr-Commit-Position: refs/heads/master@{#61863}
    d4968875
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