would've been nice to see a whole copy of the actual GCC binary in question :( e... | Hacker News

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		eigenform on Oct 9, 2023 \| parent \| context \| favorite \| on: Mitigations=off considered harmful or spurious SIG... would've been nice to see a whole copy of the actual GCC binary in question :( edit: looks like it dies in this: https://github.com/gcc-mirror/gcc/blob/master/gcc/tree-switc... edit2: it also would've been nice to see the actual bytes being decoded when it faults, maybe it ends up spuriously writing over .text edit3: on the LKML https://lore.kernel.org/lkml/D99589F4-BC5D-430B-87B2-72C2037...

Levitating on Oct 9, 2023 [–]

You can see his complete test environment here: https://www.youtube.com/channel/UCJLLl6AraX1POemgLfhirwg/com...

eigenform on Oct 10, 2023 | [–]

Oh, I didn't see that `cc1` is in the initrd image! Thanks!

Seems like there's already a potential answer to this on the LKML - looks like it has something to do with BTB state being shared between threads?

https://lore.kernel.org/lkml/20231010083956.GEZSUN3OKuYSyU18...

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