NEW 262100
[GTK] webkit2gtk crashes at runtime when GDS mitigation is enabled 
https://bugs.webkit.org/show_bug.cgi?id=262100
Summary [GTK] webkit2gtk crashes at runtime when GDS mitigation is enabled
CodingCellist
Reported 2023-09-26 00:40:22 PDT
Created attachment 467871 [details] systemd-logs of a crashing startup (GDS mitigation enabled) using builtins for avx(2) detection (behaviour is the same on unmodified install) When the Gather Data Sampling (GDS) mitigation in the Linux kernel is enabled, webkit2gtk will crash due to incomplete AVX2 enumeration. The mitigation is known to cause problems in these cases [1]. I tried rebuilding webkit2gtk while using the `__builtin_cpu_supports` functions instead of the bitshift checks in `JavaScriptCore/assembler/MacroAssemblerX86Common.cpp:collectCPUFeatures`, but unfortunately this does not seem to be sufficient to fix the issue. There are some further logs and discussion on the Arch bug tracker [2]. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=553a5c03e90a6087e88f8ff878335ef0621536fb [2]: https://bugs.archlinux.org/task/79444
Attachments
systemd-logs of a crashing startup (GDS mitigation enabled) using builtins for avx(2) detection (behaviour is the same on unmodified install) (3.87 KB, text/x-log)
2023-09-26 00:40 PDT, CodingCellist 		no flags
Details
Attempted, NON-FIXING patch (1.76 KB, patch)
2023-09-26 00:42 PDT, CodingCellist 		no flags
DetailsFormatted DiffDiff
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CodingCellist
Comment 1 2023-09-26 00:42:51 PDT
Created attachment 467872 [details] Attempted, NON-FIXING patch
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