Spender's mindset is even worse though.
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Replying to @RichFelker @revskills
KSTACKOVERFLOW started out with a similar approach and grsecurity users had to find and report the bugs until they changed it for compat...
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Not really surprising that upstream took the same kind of approach but as an enabled by default mainline feature it's a different situation.
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Replying to @CopperheadOS @revskills
Kernel can't be the one responsible for protection against this because it doesn't control stack setup. (Only for initial thread.)
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Replying to @RichFelker @revskills
KSTACKOVERFLOW / VMAP_STACK move the kernel stack to virtual memory where they get guard pages, it's not about userspace stack exhaustion.
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Replying to @CopperheadOS @revskills
Oh, misread context then. Sorry.
6:01 AM - 24 Jun 2017
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