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AJvYcCX1rYjrxT7EjifNT0k2wLGF6yZ0vnGhC1kcRNlj2LNAgDCa2CkYncayyRJPT6nBvg1UG1Bq2WXAJ4AJZU0=@vger.kernel.org X-Gm-Message-State: AOJu0Yz8fgW0WZzp2t6OLhHlJSI30zrAf/HRi1HizJ2fdt2jnMNuPLTf YQiX4jPtvSSjKU7WO0EYOQU5ZgP8CWULWRO2siZeCC7OCxT8YSwSZSS5aU7l5+oC1JCdfX8uPRh Oa4qEkOogZA== X-Received: from dlg15.prod.google.com ([2002:a05:7022:78f:b0:11f:330d:ed15]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:225:b0:11b:f056:a1b3 with SMTP id a92af1059eb24-1244a728dc0mr16430933c88.11.1769067091900; Wed, 21 Jan 2026 23:31:31 -0800 (PST) Date: Wed, 21 Jan 2026 23:31:17 -0800 In-Reply-To: <20260122073127.375139-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260122073127.375139-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260122073127.375139-2-irogers@google.com> Subject: [PATCH v1 01/11] 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