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AJvYcCW6EnJrRYUBMqxs3omE4bKWtOWig2gqDt7nhLSbVb7r9Wn4SbtLcJyAk9KWQr035FYb6lq9NJajR+i/LIk=@vger.kernel.org X-Gm-Message-State: AOJu0YxTZ3/IPBiD7684J8FsFmdSG6iQ+h07ftU7iFzzkMvDYcodzpXY 32jOQD2gkVHGF/jGjDG6fYDqha2SSjvJ2fIb5W+aUsH7fr+4ly1DxJmucTnW4Rf6GTmFIpOoo7v /03Dqm99WxQ== X-Received: from dycok8.prod.google.com ([2002:a05:7301:db08:b0:2ac:32e7:3ccd]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7301:4084:b0:2b7:2263:3d3c with SMTP id 5a478bee46e88-2b739b6d29fmr262486eec.24.1769117728705; Thu, 22 Jan 2026 13:35:28 -0800 (PST) Date: Thu, 22 Jan 2026 13:35:07 -0800 In-Reply-To: <20260122213516.671089-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260122213516.671089-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260122213516.671089-4-irogers@google.com> Subject: [PATCH v3 03/12] perf maps: Fix reference count leak in maps__find_ams From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , John Garry , Will Deacon , Leo Yan , Guo Ren , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Zecheng Li , Tianyou Li , Thomas Falcon , Julia Lawall , Suchit Karunakaran , Athira Rajeev , Aditya Bodkhe , Howard Chu , "=?UTF-8?q?Krzysztof=20=C5=81opatowski?=" , "Dr. David Alan Gilbert" , Shimin Guo , Sergei Trofimovich , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-riscv@lists.infradead.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" ams and so ams->ms.map is an in argument, however, it is also overwritten. As a map is reference counted, ensure a map__put is done before overwriting it. Signed-off-by: Ian Rogers Fixes: 42fd623b58db ("perf maps: Get map before returning in maps__find") --- tools/perf/util/maps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/perf/util/maps.c b/tools/perf/util/maps.c index 8ccc46d515b6..4092211cff62 100644 --- a/tools/perf/util/maps.c +++ b/tools/perf/util/maps.c @@ -708,6 +708,7 @@ int maps__find_ams(struct maps *maps, struct addr_map_s= ymbol *ams) if (ams->addr < map__start(ams->ms.map) || ams->addr >=3D map__end(ams->m= s.map)) { if (maps =3D=3D NULL) return -1; + map__put(ams->ms.map); ams->ms.map =3D maps__find(maps, ams->addr); if (ams->ms.map =3D=3D NULL) return -1; --=20 2.52.0.457.g6b5491de43-goog