Date: Tue, 27 Mar 2018 16:03:42 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Kees Cook <keescook@...omium.org> Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com Subject: Re: [PATCH] task_struct: Only use anon struct under randstruct plugin On Tue, 27 Mar 2018 14:36:09 -0700 Kees Cook <keescook@...omium.org> wrote: > The original intent for always adding the anonymous struct in task_struct > was to make sure we had compiler coverage. However, this caused > pathological padding of 40 bytes at the start of task_struct. Why? What caused this padding? It happens in all configs? > Instead, > move the anonymous struct to being only used when struct layout > randomization is enabled. So the mysterious 40 byte bloat is still present in this case? > Reported-by: Peter Zijlstra <peterz@...radead.org> > Fixes: 29e48ce87f1e ("task_struct: Allow randomized") > Cc: stable@...r.kernel.org Why cc:stable?
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