From: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
To: linux-perf-users@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
linux-kernel@vger.kernel.org,
Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Subject: [PATCH] perf hist: fix memory leak if histogram entry is reused
Date: Thu, 21 Feb 2019 13:23:06 +0100 [thread overview]
Message-ID: <20190221122306.1511-1-jonas.rabenstein@studium.uni-erlangen.de> (raw)
In __hists__add_entry the srcline of the addr_location is duplicated
for the hist_entry. If hists__findnew_entry returns an already existing
hist_entry the srcline has to be freed again as no further reference to
that duplicated srcline would exists anymore.
Signed-off-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
---
tools/perf/util/hist.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 8aad8330e392..25b8dbdbbe87 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -623,6 +623,9 @@ __hists__add_entry(struct hists *hists,
.ops = ops,
}, *he = hists__findnew_entry(hists, &entry, al, sample_self);
+ if (he && he->srcline != entry.srcline)
+ free(entry.srcline);
+
if (!hists->has_callchains && he && he->callchain_size != 0)
hists->has_callchains = true;
return he;
--
2.19.2
next reply other threads:[~2019-02-21 12:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 12:23 Jonas Rabenstein [this message]
2019-02-21 12:39 ` [PATCH] perf hist: fix memory leak if histogram entry is reused Jiri Olsa
2019-02-21 13:53 ` Jonas Rabenstein
2019-02-21 16:28 ` Jiri Olsa
2019-02-23 3:18 ` Namhyung Kim
2019-02-25 13:54 ` Jiri Olsa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190221122306.1511-1-jonas.rabenstein@studium.uni-erlangen.de \
--to=jonas.rabenstein@studium.uni-erlangen.de \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=jolsa@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).