linux-kernel - Re: [PATCH AUTOSEL for 4.9 160/293] MIPS: Give __secure

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Message-ID: <20180409202642.GD17347@saruman>
Date:   Mon, 9 Apr 2018 21:26:43 +0100
From:   James Hogan <jhogan@...nel.org>
To:     Sasha Levin <Alexander.Levin@...rosoft.com>
Cc:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        David Daney <david.daney@...ium.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Matt Redfearn <matt.redfearn@...tec.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
        Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH AUTOSEL for 4.9 160/293] MIPS: Give __secure_computing()
 access to syscall arguments.

On Mon, Apr 09, 2018 at 12:24:58AM +0000, Sasha Levin wrote:
> From: David Daney <david.daney@...ium.com>
> 
> [ Upstream commit 669c4092225f0ed5df12ebee654581b558a5e3ed ]
> 
> KProbes of __seccomp_filter() are not very useful without access to
> the syscall arguments.
> 
> Do what x86 does, and populate a struct seccomp_data to be passed to
> __secure_computing().  This allows samples/bpf/tracex5 to extract a
> sensible trace.

This broke o32 indirect syscalls, and was fixed by commit 3d729deaf287
("MIPS: seccomp: Fix indirect syscall args").

Cheers
James

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