Date: Mon, 26 Oct 2020 16:51:25 +0000 From: Mark Brown <broonie@...nel.org> To: Dave Martin <Dave.Martin@....com> Cc: Catalin Marinas <catalin.marinas@....com>, Topi Miettinen <toiwoton@...il.com>, Mark Rutland <mark.rutland@....com>, Salvatore Mesoraca <s.mesoraca16@...il.com>, systemd-devel@...ts.freedesktop.org, Kees Cook <keescook@...omium.org>, kernel-hardening@...ts.openwall.com, Will Deacon <will.deacon@....com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Jeremy Linton <jeremy.linton@....com>, linux-hardening@...r.kernel.org, libc-alpha@...rceware.org, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> Subject: Re: BTI interaction between seccomp filters in systemd and glibc mprotect calls, causing service failures On Mon, Oct 26, 2020 at 03:56:35PM +0000, Dave Martin wrote: > On Mon, Oct 26, 2020 at 02:52:46PM +0000, Catalin Marinas via Libc-alpha wrote: > > Now, if the dynamic loader silently ignores the mprotect() failure on > > the main executable, is there much value in exposing a flag in the aux > > vectors? It saves a few (one?) mprotect() calls but I don't think it > > matters much. Anyway, I don't mind the flag. > I don't see a problem with the aforementioned patch  to pre-set BTI > on the pages of the main binary. Me either FWIW. Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)
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