From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@armlinux.org.uk (Russell King - ARM Linux) Date: Mon, 8 Oct 2018 19:13:42 +0100 Subject: ARM: Call syscall_trace_exit even when system call skipped In-Reply-To: References: <20180203152112.2449-1-T.E.Baldwin99@members.leeds.ac.uk> <20181008110047.GA3426@asgard.redhat.com> Message-ID: <20181008181341.GK30658@n2100.armlinux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Oct 08, 2018 at 11:08:16AM -0700, Kees Cook wrote: > On Mon, Oct 8, 2018 at 4:00 AM, Eugene Syromyatnikov wrote: > > From: Timothy E Baldwin > > > > 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 > > Signed-off-by: Eugene Syromyatnikov > > Reviewed-by: Kees Cook > > Tested-by: Kees Cook > > Tested-by: Eugene Syromyatnikov > > --- > > 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/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up