linux-kernel - Re: [PATCH bpf-next 2/2] bpf: Expose bpf_d

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Date:   Fri, 13 Nov 2020 16:33:39 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Yonghong Song <yhs@...com>, KP Singh <kpsingh@...omium.org>,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Jann Horn <jannh@...gle.com>,
        Hao Luo <haoluo@...gle.com>,
        Florent Revest <revest@...omium.org>,
        Brendan Jackman <jackmanb@...omium.org>
Subject: Re: [PATCH bpf-next 2/2] bpf: Expose bpf_d_path helper to sleepable
 LSM hooks

On 11/13/20 4:18 AM, Yonghong Song wrote:
> 
> 
> On 11/12/20 9:19 AM, KP Singh wrote:
>> From: KP Singh <kpsingh@...gle.com>
>>
>> Sleepable hooks are never called from an NMI/interrupt context, so it is
>> safe to use the bpf_d_path helper in LSM programs attaching to these
>> hooks.
>>
>> The helper is not restricted to sleepable programs and merely uses the
>> list of sleeable hooks as the initial subset of LSM hooks where it can
> 
> sleeable => sleepable
> 
> probably not need to resend if no other major changes. The maintainer
> can just fix it up before merging.

Did while rebasing & applying, thanks everyone!

>> be used.
>>
>> Signed-off-by: KP Singh <kpsingh@...gle.com>
> 
> Acked-by: Yonghong Song <yhs@...com>