[Webkit-unassigned] [Bug 188145] New: Hardcoded LFENCE instruction

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Jul 29 01:40:47 PDT 2018


            Bug ID: 188145
           Summary: Hardcoded LFENCE instruction
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: karogyoker2+webkit at gmail.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 346020

  --> https://bugs.webkit.org/attachment.cgi?id=346020&action=review


WebKit crashes instantly on all 32 bit AMD processors and also on all 32 bit Intel processors (except Willamette or newer) since 2.19.90 (released on February 5, 2018).
This is because there is a hardcoded LFENCE instruction which can be only run by CPUs which have the SSE2 instruction set.

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