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Date:   Thu, 09 Nov 2017 15:31:10 +0000
From:   David Howells <>
        Anil S Keshavamurthy <>,
        "David S. Miller" <>,
        Masami Hiramatsu <>,,
Subject: Re: [RFC][PATCH] Lock down kprobes

So this?

commit b5bb759d5e7f99c357b82b8066a9106b817de965
Author: David Howells <>
Date:   Wed Nov 8 16:14:12 2017 +0000

    Lock down kprobes
    Disallow the creation of kprobes when the kernel is locked down by
    preventing their registration.
    Signed-off-by: David Howells <>

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index a1606a4224e1..f06023b0936c 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1530,6 +1530,9 @@ int register_kprobe(struct kprobe *p)
 	struct module *probed_mod;
 	kprobe_opcode_t *addr;
+	if (kernel_is_locked_down("Use of kprobes"))
+		return -EPERM;
 	/* Adjust probe address from symbol */
 	addr = kprobe_addr(p);
 	if (IS_ERR(addr))

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