| Message ID | 11290.1510245882@warthog.procyon.org.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Apologies - I'm not sure what happened to the To: list there. David -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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))
Hi, I need to lock down kprobes under secure boot conditions as part of the patch series that can be found here: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=efi-lock-down Can you tell me that if the attached patch is sufficient to the cause? Thanks, David --- commit ffb3484d6e0f1d625f8e84a6a19c139a28a52499 Author: David Howells <dhowells@redhat.com> 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. This prevents kprobes from being used to access kernel memory, either to make modifications or to steal crypto data. Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com> -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html