From: Mark Brown <broonie@kernel.org>
To: Dave Martin <Dave.Martin@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Topi Miettinen <toiwoton@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
Salvatore Mesoraca <s.mesoraca16@gmail.com>,
systemd-devel@lists.freedesktop.org,
Kees Cook <keescook@chromium.org>,
kernel-hardening@lists.openwall.com,
Will Deacon <will.deacon@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Jeremy Linton <jeremy.linton@arm.com>,
linux-hardening@vger.kernel.org, libc-alpha@sourceware.org,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: BTI interaction between seccomp filters in systemd and glibc mprotect calls, causing service failures
Date: Mon, 26 Oct 2020 16:51:25 +0000 [thread overview]
Message-ID: <20201026165125.GF7402@sirena.org.uk> (raw)
In-Reply-To: <20201026155628.GA27285@arm.com>
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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 [2] to pre-set BTI
> on the pages of the main binary.
Me either FWIW.
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WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Dave Martin <Dave.Martin@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Salvatore Mesoraca <s.mesoraca16@gmail.com>,
systemd-devel@lists.freedesktop.org,
Kees Cook <keescook@chromium.org>,
kernel-hardening@lists.openwall.com,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Jeremy Linton <jeremy.linton@arm.com>,
Topi Miettinen <toiwoton@gmail.com>,
linux-hardening@vger.kernel.org, libc-alpha@sourceware.org,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: BTI interaction between seccomp filters in systemd and glibc mprotect calls, causing service failures
Date: Mon, 26 Oct 2020 16:51:25 +0000 [thread overview]
Message-ID: <20201026165125.GF7402@sirena.org.uk> (raw)
In-Reply-To: <20201026155628.GA27285@arm.com>
[-- Attachment #1.1: Type: text/plain, Size: 541 bytes --]
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 [2] to pre-set BTI
> on the pages of the main binary.
Me either FWIW.
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next prev parent reply other threads:[~2020-10-26 16:52 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8584c14f-5c28-9d70-c054-7c78127d84ea@arm.com>
2020-10-22 7:18 ` [systemd-devel] BTI interaction between seccomp filters in systemd and glibc mprotect calls, causing service failures Lennart Poettering
2020-10-22 7:18 ` Lennart Poettering
2020-10-22 7:54 ` Florian Weimer
2020-10-22 7:54 ` Florian Weimer
2020-10-22 8:17 ` Topi Miettinen
2020-10-22 8:17 ` Topi Miettinen
2020-10-22 8:25 ` Florian Weimer
2020-10-22 8:25 ` Florian Weimer
2020-10-22 8:29 ` Szabolcs Nagy
2020-10-22 8:29 ` Szabolcs Nagy
2020-10-22 8:38 ` Lennart Poettering
2020-10-22 8:38 ` Lennart Poettering
2020-10-22 9:31 ` Catalin Marinas
2020-10-22 9:31 ` Catalin Marinas
2020-10-22 10:12 ` Topi Miettinen
2020-10-22 10:12 ` Topi Miettinen
2020-10-22 10:27 ` Florian Weimer
2020-10-22 10:27 ` Florian Weimer
2020-10-23 6:13 ` Szabolcs Nagy
2020-10-23 6:13 ` Szabolcs Nagy
2020-10-23 9:04 ` Catalin Marinas
2020-10-23 9:04 ` Catalin Marinas
2020-10-22 10:03 ` Topi Miettinen
2020-10-22 10:03 ` Topi Miettinen
2020-10-22 8:05 ` Szabolcs Nagy
2020-10-22 8:05 ` Szabolcs Nagy
2020-10-22 8:31 ` Lennart Poettering
2020-10-22 8:31 ` Lennart Poettering
[not found] ` <20201022075447.GO3819@arm.com>
2020-10-22 10:39 ` Topi Miettinen
2020-10-22 10:39 ` Topi Miettinen
2020-10-22 20:02 ` Kees Cook
2020-10-22 20:02 ` Kees Cook
2020-10-22 20:02 ` Kees Cook
2020-10-22 22:24 ` Topi Miettinen
2020-10-22 22:24 ` Topi Miettinen
2020-10-22 22:24 ` Topi Miettinen
2020-10-23 17:52 ` Salvatore Mesoraca
2020-10-23 17:52 ` Salvatore Mesoraca
2020-10-23 17:52 ` Salvatore Mesoraca
2020-10-24 11:34 ` Topi Miettinen
2020-10-24 11:34 ` Topi Miettinen
2020-10-24 11:34 ` Topi Miettinen
2020-10-24 14:12 ` Salvatore Mesoraca
2020-10-24 14:12 ` Salvatore Mesoraca
2020-10-24 14:12 ` Salvatore Mesoraca
2020-10-25 13:42 ` Jordan Glover
2020-10-25 13:42 ` Jordan Glover
2020-10-25 13:42 ` Jordan Glover
2020-10-23 9:02 ` Catalin Marinas
2020-10-23 9:02 ` Catalin Marinas
2020-10-23 9:02 ` Catalin Marinas
2020-10-24 11:01 ` Topi Miettinen
2020-10-24 11:01 ` Topi Miettinen
2020-10-24 11:01 ` Topi Miettinen
2020-10-26 14:52 ` Catalin Marinas
2020-10-26 14:52 ` Catalin Marinas
2020-10-26 14:52 ` Catalin Marinas
2020-10-26 15:56 ` Dave Martin
2020-10-26 15:56 ` Dave Martin
2020-10-26 15:56 ` Dave Martin
2020-10-26 16:51 ` Mark Brown [this message]
2020-10-26 16:51 ` Mark Brown
2020-10-26 16:51 ` Mark Brown
2020-10-26 16:31 ` Topi Miettinen
2020-10-26 16:31 ` Topi Miettinen
2020-10-26 16:31 ` Topi Miettinen
2020-10-26 16:24 ` Dave Martin
2020-10-26 16:24 ` Dave Martin
2020-10-26 16:39 ` Topi Miettinen
2020-10-26 16:39 ` Topi Miettinen
2020-10-26 16:45 ` Florian Weimer
2020-10-26 16:45 ` Florian Weimer
2020-10-27 14:22 ` Dave Martin
2020-10-27 14:22 ` Dave Martin
2020-10-27 14:41 ` Florian Weimer
2020-10-27 14:41 ` Florian Weimer
2020-10-26 16:57 ` Szabolcs Nagy
2020-10-26 16:57 ` Szabolcs Nagy
2020-10-26 17:52 ` Dave Martin
2020-10-26 17:52 ` Dave Martin
2020-10-26 22:39 ` Jeremy Linton
2020-10-26 22:39 ` Jeremy Linton
2020-10-27 14:15 ` Dave Martin
2020-10-27 14:15 ` Dave Martin
2020-10-29 11:02 ` Catalin Marinas
2020-10-29 11:02 ` Catalin Marinas
2020-11-04 12:18 ` Dave Martin
2020-11-04 12:18 ` Dave Martin
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