From: linux@armlinux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: ARM: Call syscall_trace_exit even when system call skipped
Date: Mon, 8 Oct 2018 19:13:42 +0100 [thread overview]
Message-ID: <20181008181341.GK30658@n2100.armlinux.org.uk> (raw)
In-Reply-To: <CAGXu5jK1Jkxg6gkOV9GqW4FE96UNoOaG3-f5JVq6h9gnk53ohg@mail.gmail.com>
On Mon, Oct 08, 2018 at 11:08:16AM -0700, Kees Cook wrote:
> On Mon, Oct 8, 2018 at 4:00 AM, Eugene Syromyatnikov <evgsyr@gmail.com> wrote:
> > From: Timothy E Baldwin <T.E.Baldwin99@members.leeds.ac.uk>
> >
> > On at least x86 and ARM64, and as documented in the ptrace man page
> > a skipped system call will still cause a syscall exit ptrace stop.
> >
> > Previous to this commit 32-bit ARM did not, resulting in strace
> > being confused when seccomp skips system calls.
> >
> > This change also impacts programs that use ptrace to skip system calls.
> >
> > Fixes: ad75b51459ae ("ARM: 7579/1: arch/allow a scno of -1 to not cause a SIGILL")
> > Signed-off-by: Timothy E Baldwin <T.E.Baldwin99@members.leeds.ac.uk>
> > Signed-off-by: Eugene Syromyatnikov <evgsyr@gmail.com>
> > Reviewed-by: Kees Cook <keescook@chromium.org>
> > Tested-by: Kees Cook <keescook@chromium.org>
> > Tested-by: Eugene Syromyatnikov <evgsyr@gmail.com>
> > ---
> > KernelVersion: 4.19-rc7
>
> Did this actually make it into the patch tracker? I don't see it in Incoming...
No, rejected at SMTP time (so bounced) due to it being sent from a
gmail.com address but _not_ going through gmail servers (so no DKIM
signature.) Hence, looks like all the other fake gmail crud and gets
rejected outright.
I guess if Eugene didn't get the bounce notification, then gmail
decided to discard that as fake too!
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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next prev parent reply other threads:[~2018-10-08 18:13 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-03 15:21 [PATCH] ARM: Call syscall_trace_exit even when system call skipped Timothy E Baldwin
2018-03-13 23:58 ` Dmitry V. Levin
2018-03-15 0:44 ` Kees Cook
2018-03-15 10:38 ` T.E.Baldwin99 at members.leeds.ac.uk
2018-03-15 20:14 ` Kees Cook
2018-09-29 23:03 ` Eugene Syromyatnikov
2018-10-08 7:11 ` Eugene Syromyatnikov
2018-10-08 9:58 ` Vladimir Murzin
2018-10-08 11:00 ` Eugene Syromyatnikov
2018-10-08 18:08 ` Kees Cook
2018-10-08 18:13 ` Russell King - ARM Linux [this message]
2018-10-08 18:33 ` Eugene Syromyatnikov
2018-10-08 18:26 ` Eugene Syromyatnikov
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