From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3181A61FFE; Tue, 12 Aug 2025 18:17:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755022635; cv=none; b=sbFmBcIY+cCmCDttnfwvxmYmY7c4RTwxVZNnih1VOFHF8CkTGbWb0xLpfOGx1naJW1GF9f4zPgZPwb5IwyqDrQGQGpots6PSye3ewcxQLpW/sR7/keouzhaM3ItOAImRMOpj0/BZ+8uhEhMbVH1KmaSj0OGJmNOZfCgYsHHqpno= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755022635; c=relaxed/simple; bh=2NhMcA2h85UBndp3Y++bCgW6paMTRe5ORL7XLP6EcfY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lU5Eiy9jm3BhfcelkiueUPKNLYYyjZjSvuq9z6GLdTZk4jJjdF9PdPLUPsVy7k+3pVV/U77lVIr3NAWjb9eli9dfzZUxrmLOexPHOcEmk16Skwo8fJyugXjNfowKhbKVETD2xtgwXroMVe6iQwW4EvMfl2+JuYS7rYCFTgrm9qk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=QH/sPQ9R; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="QH/sPQ9R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3EDDDC4CEF0; Tue, 12 Aug 2025 18:17:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755022634; bh=2NhMcA2h85UBndp3Y++bCgW6paMTRe5ORL7XLP6EcfY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QH/sPQ9R9qOAmQnwxfJ7ckXQUOEthQzEAduEDWLk40S0JC9QCiuotNuOQVo8YVIWY g9klZDE+wh9WrpinNWtH6dUPrBaqwRMhaYtlfCIczdT+BMy4asoeMNDtzPsGHtrnn+ ZO5iwS7GdEdPWPX6sUo1jIyuvXdVhd7coRGyd/dI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ian Rogers , Namhyung Kim , Sasha Levin Subject: [PATCH 6.12 180/369] perf sched: Fix memory leaks in perf sched map Date: Tue, 12 Aug 2025 19:27:57 +0200 Message-ID: <20250812173021.546168110@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250812173014.736537091@linuxfoundation.org> References: <20250812173014.736537091@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Namhyung Kim [ Upstream commit dc3a80c98884d86389b3b572c50ccc7f502cd41b ] It maintains per-cpu pointers for the current thread but it doesn't release the refcounts. Fixes: 5e895278697c014e ("perf sched: Move curr_thread initialization to perf_sched__map()") Reviewed-by: Ian Rogers Tested-by: Ian Rogers Link: https://lore.kernel.org/r/20250703014942.1369397-4-namhyung@kernel.org Signed-off-by: Namhyung Kim Signed-off-by: Sasha Levin --- tools/perf/builtin-sched.c | 31 ++++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index c55388b36ac5..cd15c0cba9b2 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -1639,6 +1639,7 @@ static int map_switch_event(struct perf_sched *sched, struct evsel *evsel, const char *color = PERF_COLOR_NORMAL; char stimestamp[32]; const char *str; + int ret = -1; BUG_ON(this_cpu.cpu >= MAX_CPUS || this_cpu.cpu < 0); @@ -1669,17 +1670,20 @@ static int map_switch_event(struct perf_sched *sched, struct evsel *evsel, sched_in = map__findnew_thread(sched, machine, -1, next_pid); sched_out = map__findnew_thread(sched, machine, -1, prev_pid); if (sched_in == NULL || sched_out == NULL) - return -1; + goto out; tr = thread__get_runtime(sched_in); - if (tr == NULL) { - thread__put(sched_in); - return -1; - } + if (tr == NULL) + goto out; + + thread__put(sched->curr_thread[this_cpu.cpu]); + thread__put(sched->curr_out_thread[this_cpu.cpu]); sched->curr_thread[this_cpu.cpu] = thread__get(sched_in); sched->curr_out_thread[this_cpu.cpu] = thread__get(sched_out); + ret = 0; + str = thread__comm_str(sched_in); new_shortname = 0; if (!tr->shortname[0]) { @@ -1774,12 +1778,10 @@ static int map_switch_event(struct perf_sched *sched, struct evsel *evsel, color_fprintf(stdout, color, "\n"); out: - if (sched->map.task_name) - thread__put(sched_out); - + thread__put(sched_out); thread__put(sched_in); - return 0; + return ret; } static int process_sched_switch_event(const struct perf_tool *tool, @@ -3546,10 +3548,10 @@ static int perf_sched__map(struct perf_sched *sched) sched->curr_out_thread = calloc(MAX_CPUS, sizeof(*(sched->curr_out_thread))); if (!sched->curr_out_thread) - return rc; + goto out_free_curr_thread; if (setup_cpus_switch_event(sched)) - goto out_free_curr_thread; + goto out_free_curr_out_thread; if (setup_map_cpus(sched)) goto out_free_cpus_switch_event; @@ -3580,7 +3582,14 @@ static int perf_sched__map(struct perf_sched *sched) out_free_cpus_switch_event: free_cpus_switch_event(sched); +out_free_curr_out_thread: + for (int i = 0; i < MAX_CPUS; i++) + thread__put(sched->curr_out_thread[i]); + zfree(&sched->curr_out_thread); + out_free_curr_thread: + for (int i = 0; i < MAX_CPUS; i++) + thread__put(sched->curr_thread[i]); zfree(&sched->curr_thread); return rc; } -- 2.39.5