linux-kernel - [PATCH 29/34] perf symbols: Set freed members to NULL in dso destructor

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 for Android: free password hash cracker in your pocket

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

Message-Id: <1386707476-12370-10-git-send-email-acme@infradead.org>
Date:	Tue, 10 Dec 2013 17:31:11 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 29/34] perf symbols: Set freed members to NULL in dso destructor

From: Arnaldo Carvalho de Melo <acme@...hat.com>

To help in debugging use after free bugs.

Reported-by: Ingo Molnar <mingo@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Mike Galbraith <efault@....de>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-3ckwsob2g1q23s77nuhexrq7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/dso.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 2c7e1899a735..19babb0d365d 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -475,13 +475,23 @@ void dso__delete(struct dso *dso)
 	int i;
 	for (i = 0; i < MAP__NR_TYPES; ++i)
 		symbols__delete(&dso->symbols[i]);
-	if (dso->short_name_allocated)
+
+	if (dso->short_name_allocated) {
 		free((char *)dso->short_name);
-	if (dso->long_name_allocated)
+		dso->short_name		  = NULL;
+		dso->short_name_allocated = false;
+	}
+
+	if (dso->long_name_allocated) {
 		free((char *)dso->long_name);
+		dso->long_name		 = NULL;
+		dso->long_name_allocated = false;
+	}
+
 	dso_cache__free(&dso->cache);
 	dso__free_a2l(dso);
 	free(dso->symsrc_filename);
+	dso->symsrc_filename = NULL;
 	free(dso);
 }
 
-- 
1.8.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/