linux-kernel - [PATCH] uprobe: Add uprobe_pre/post_sstep_notifier to NOKPROBE

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Message-Id: <66dfa2cb82fc306d42e51adf0f5d819b4695644e.1470120173.git.panand@redhat.com>
Date:	Tue,  2 Aug 2016 12:14:06 +0530
From:	Pratyush Anand <panand@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	oleg@...hat.com, srikar@...ux.vnet.ibm.com,
	Pratyush Anand <panand@...hat.com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH] uprobe: Add uprobe_pre/post_sstep_notifier to NOKPROBE_SYMBOL

uprobe_pre_sstep_notifier and uprobe_post_sstep_notifier are called from
debug exception handler, so blacklist them for kprobing.

Signed-off-by: Pratyush Anand <panand@...hat.com>
---
 kernel/events/uprobes.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index b7a525ab2083..206e594cb65e 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -37,6 +37,7 @@
 #include <linux/percpu-rwsem.h>
 #include <linux/task_work.h>
 #include <linux/shmem_fs.h>
+#include <linux/kprobes.h>
 
 #include <linux/uprobes.h>
 
@@ -1997,6 +1998,7 @@ int uprobe_pre_sstep_notifier(struct pt_regs *regs)
 	set_thread_flag(TIF_UPROBE);
 	return 1;
 }
+NOKPROBE_SYMBOL(uprobe_pre_sstep_notifier);
 
 /*
  * uprobe_post_sstep_notifier gets called in interrupt context as part of notifier
@@ -2014,6 +2016,7 @@ int uprobe_post_sstep_notifier(struct pt_regs *regs)
 	set_thread_flag(TIF_UPROBE);
 	return 1;
 }
+NOKPROBE_SYMBOL(uprobe_post_sstep_notifier);
 
 static struct notifier_block uprobe_exception_nb = {
 	.notifier_call		= arch_uprobe_exception_notify,
-- 
2.5.5