linux-kernel - Re: [PATCH v6 06/10] trace/bpf_trace: open access for CAP

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Message-ID: <alpine.LRH.2.21.2001290816510.2204@namei.org>
Date:   Wed, 29 Jan 2020 08:17:11 +1100 (AEDT)
From:   James Morris <jmorris@...ei.org>
To:     Alexey Budankov <alexey.budankov@...ux.intel.com>
cc:     Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        "benh@...nel.crashing.org" <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "james.bottomley@...senpartnership.com" 
        <james.bottomley@...senpartnership.com>,
        Serge Hallyn <serge@...lyn.com>, Will Deacon <will@...nel.org>,
        Robert Richter <rric@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        Jiri Olsa <jolsa@...hat.com>, Andi Kleen <ak@...ux.intel.com>,
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        Igor Lubashev <ilubashe@...mai.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Song Liu <songliubraving@...com>,
        Lionel Landwerlin <lionel.g.landwerlin@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
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        <linux-security-module@...r.kernel.org>,
        "selinux@...r.kernel.org" <selinux@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
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        "linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
        oprofile-list@...ts.sf.net
Subject: Re: [PATCH v6 06/10] trace/bpf_trace: open access for CAP_PERFMON
 privileged process

On Tue, 28 Jan 2020, Alexey Budankov wrote:

> 
> Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
> ---
>  kernel/trace/bpf_trace.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
> index e5ef4ae9edb5..334f1d71ebb1 100644
> --- a/kernel/trace/bpf_trace.c
> +++ b/kernel/trace/bpf_trace.c
> @@ -1395,7 +1395,7 @@ int perf_event_query_prog_array(struct perf_event *event, void __user *info)
>  	u32 *ids, prog_cnt, ids_len;
>  	int ret;
>  
> -	if (!capable(CAP_SYS_ADMIN))
> +	if (!perfmon_capable())
>  		return -EPERM;
>  	if (event->attr.type != PERF_TYPE_TRACEPOINT)
>  		return -EINVAL;
> 


Acked-by: James Morris <jamorris@...ux.microsoft.com>


-- 
James Morris
<jmorris@...ei.org>