linux-kernel - Re: [PATCH net-next 3/6] bpf: perf_event progs should only use preallocated maps

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Message-ID: <57C4D3A0.7090100@iogearbox.net>
Date:   Tue, 30 Aug 2016 02:30:24 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Alexei Starovoitov <ast@...com>,
        "David S . Miller" <davem@...emloft.net>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Brendan Gregg <bgregg@...flix.com>,
        Arnaldo Carvalho de Melo <acme@...radead.org>,
        Wang Nan <wangnan0@...wei.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH net-next 3/6] bpf: perf_event progs should only use preallocated
 maps

On 08/27/2016 04:31 AM, Alexei Starovoitov wrote:
> Make sure that BPF_PROG_TYPE_PERF_EVENT programs only use
> preallocated hash maps, since doing memory allocation
> in overflow_handler can crash depending on where nmi got triggered.
>
> Signed-off-by: Alexei Starovoitov <ast@...nel.org>

Acked-by: Daniel Borkmann <daniel@...earbox.net>