linux-kernel - Re: [PATCH bpf-next v3 2/3] bpf: Add a BPF helper for getting the IMA hash of an inode

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Message-ID: <4f1309b1-830b-f76f-0b9b-c783f062f0ab@fb.com>
Date:   Tue, 24 Nov 2020 09:41:41 -0800
From:   Yonghong Song <yhs@...com>
To:     KP Singh <kpsingh@...omium.org>, James Morris <jmorris@...ei.org>,
        <linux-kernel@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-security-module@...r.kernel.org>
CC:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Florent Revest <revest@...omium.org>,
        Brendan Jackman <jackmanb@...omium.org>,
        Mimi Zohar <zohar@...ux.ibm.com>
Subject: Re: [PATCH bpf-next v3 2/3] bpf: Add a BPF helper for getting the IMA
 hash of an inode



On 11/24/20 7:12 AM, KP Singh wrote:
> From: KP Singh <kpsingh@...gle.com>
> 
> Provide a wrapper function to get the IMA hash of an inode. This helper
> is useful in fingerprinting files (e.g executables on execution) and
> using these fingerprints in detections like an executable unlinking
> itself.
> 
> Since the ima_inode_hash can sleep, it's only allowed for sleepable
> LSM hooks.
> 
> Signed-off-by: KP Singh <kpsingh@...gle.com>

Acked-by: Yonghong Song <yhs@...com>