linux-kernel - [tip:perf/core] kprobes: Convert kprobe_exceptions_notify to use NOKPROBE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tip-5f6bee34707973ea7879a7857fd63ddccc92fff3@git.kernel.org>
Date:   Wed, 15 Mar 2017 11:44:40 -0700
From:   "tip-bot for Naveen N. Rao" <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...nel.org, acme@...hat.com,
        mhiramat@...nel.org, linux-kernel@...r.kernel.org,
        ananth@...ux.vnet.ibm.com, hpa@...or.com,
        naveen.n.rao@...ux.vnet.ibm.com
Subject: [tip:perf/core] kprobes: Convert kprobe_exceptions_notify to use
 NOKPROBE_SYMBOL

Commit-ID:  5f6bee34707973ea7879a7857fd63ddccc92fff3
Gitweb:     http://git.kernel.org/tip/5f6bee34707973ea7879a7857fd63ddccc92fff3
Author:     Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
AuthorDate: Wed, 8 Mar 2017 22:34:15 +0530
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 14 Mar 2017 15:17:40 -0300

kprobes: Convert kprobe_exceptions_notify to use NOKPROBE_SYMBOL

commit fc62d0207ae0 ("kprobes: Introduce weak variant of
kprobe_exceptions_notify()") used the __kprobes annotation to exclude
kprobe_exceptions_notify from being probed. Since NOKPROBE_SYMBOL() is a
better way to do this enabling the symbol to be discovered as being
blacklisted, change over to using NOKPROBE_SYMBOL().

Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/3f25bf400da5c222cd9b10eec6ded2d6b58209f8.1488991670.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 kernel/kprobes.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 448759d..4780ec23 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1740,11 +1740,12 @@ void unregister_kprobes(struct kprobe **kps, int num)
 }
 EXPORT_SYMBOL_GPL(unregister_kprobes);
 
-int __weak __kprobes kprobe_exceptions_notify(struct notifier_block *self,
-					      unsigned long val, void *data)
+int __weak kprobe_exceptions_notify(struct notifier_block *self,
+					unsigned long val, void *data)
 {
 	return NOTIFY_DONE;
 }
+NOKPROBE_SYMBOL(kprobe_exceptions_notify);
 
 static struct notifier_block kprobe_exceptions_nb = {
 	.notifier_call = kprobe_exceptions_notify,