linux-kernel - [PATCH] perf probe: Fix kprobe blacklist checking condition

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Message-ID: <1504011443-7269-1-git-send-email-huawei.libin@huawei.com>
Date:   Tue, 29 Aug 2017 20:57:23 +0800
From:   Li Bin <huawei.libin@...wei.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, Wang Nan <wangnan0@...wei.com>,
        <huawei.libin@...wei.com>, <zhangmengting@...wei.com>
Subject: [PATCH] perf probe: Fix kprobe blacklist checking condition

The commit 9aaf5a5("perf probe: Check kprobes blacklist
when adding new events"), perf probe supports checking
the blacklist of the fuctions which can not be probed.
But the checking condition is wrong, that the end_addr
of the symbol which is the start_addr of the next symbol
can't be included.

Signed-off-by: Li Bin <huawei.libin@...wei.com>
---
 tools/perf/util/probe-event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index a2670e9..bf7c928 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -2373,7 +2373,7 @@ static int kprobe_blacklist__load(struct list_head *blacklist)
 	struct kprobe_blacklist_node *node;
 
 	list_for_each_entry(node, blacklist, list) {
-		if (node->start <= address && address <= node->end)
+		if (node->start <= address && address < node->end)
 			return node;
 	}
 
-- 
1.7.12.4