linux-kernel - [PATCH 2/3] perf dlfilter: Initialize addr_location before passing it to thread__find_symbol

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Message-Id: <20230731091857.10681-2-adrian.hunter@intel.com>
Date:   Mon, 31 Jul 2023 12:18:56 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: [PATCH 2/3] perf dlfilter: Initialize addr_location before passing it to thread__find_symbol_fb()

From: Arnaldo Carvalho de Melo <acme@...nel.org>

As thread__find_symbol_fb() will end up calling thread__find_map() and
it in turn will call these on uninitialized memory:

        maps__zput(al->maps);
        map__zput(al->map);
        thread__zput(al->thread);

Fixes: 0dd5041c9a0e ("perf addr_location: Add init/exit/copy functions")
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>
Cc: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
Cc: Disha Goel <disgoel@...ux.vnet.ibm.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Kajol Jain <kjain@...ux.ibm.com>
Cc: Madhavan Srinivasan <maddy@...ux.ibm.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Link: https://lore.kernel.org/lkml/
Signed-off-by: Arnaldo Carvalho de Melo <acme@...nel.org>
---
 tools/perf/util/dlfilter.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/dlfilter.c b/tools/perf/util/dlfilter.c
index 46f74b2344db..798a53d7e6c9 100644
--- a/tools/perf/util/dlfilter.c
+++ b/tools/perf/util/dlfilter.c
@@ -166,6 +166,7 @@ static __s32 dlfilter__resolve_address(void *ctx, __u64 address, struct perf_dlf
 	if (!thread)
 		return -1;
 
+	addr_location__init(&al);
 	thread__find_symbol_fb(thread, d->sample->cpumode, address, &al);
 
 	al_to_d_al(&al, &d_al);
-- 
2.34.1