From: Namhyung Kim <namhyung@kernel.org>
To: Ian Rogers <irogers@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>, Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Yicong Yang <yangyicong@hisilicon.com>,
Jonathan Cameron <jonathan.cameron@huawei.com>,
Yang Jihong <yangjihong1@huawei.com>,
Kan Liang <kan.liang@linux.intel.com>,
Ming Wang <wangming01@loongson.cn>,
Huacai Chen <chenhuacai@kernel.org>,
Sean Christopherson <seanjc@google.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
Yanteng Si <siyanteng@loongson.cn>,
Yuan Can <yuancan@huawei.com>,
Ravi Bangoria <ravi.bangoria@amd.com>,
James Clark <james.clark@arm.com>,
llvm@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-perf-users@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [PATCH v2 05/18] perf bench uprobe: Fix potential use of memory after free
Date: Sun, 8 Oct 2023 22:51:33 -0700 [thread overview]
Message-ID: <CAM9d7chmVRrFgEZMYk3EWG+1wjXqLC3suu-xrX64hmfBSAFi0A@mail.gmail.com> (raw)
In-Reply-To: <20231005230851.3666908-6-irogers@google.com>
On Thu, Oct 5, 2023 at 4:09 PM Ian Rogers <irogers@google.com> wrote:
>
> Found by clang-tidy:
> ```
> bench/uprobe.c:98:3: warning: Use of memory after it is freed [clang-analyzer-unix.Malloc]
> bench_uprobe_bpf__destroy(skel);
> ```
>
> Signed-off-by: Ian Rogers <irogers@google.com>
I'm ok with the change but I think it won't call
bench_uprobe__teardown_bpf_skel() if the setup function
returns a negative value. Maybe we also need to set the
err in the default case of `switch (bench)` statement.
Thanks,
Namhyung
> ---
> tools/perf/bench/uprobe.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/tools/perf/bench/uprobe.c b/tools/perf/bench/uprobe.c
> index 914c0817fe8a..5c71fdc419dd 100644
> --- a/tools/perf/bench/uprobe.c
> +++ b/tools/perf/bench/uprobe.c
> @@ -89,6 +89,7 @@ static int bench_uprobe__setup_bpf_skel(enum bench_uprobe bench)
> return err;
> cleanup:
> bench_uprobe_bpf__destroy(skel);
> + skel = NULL;
> return err;
> }
>
> --
> 2.42.0.609.gbb76f46606-goog
>
next prev parent reply other threads:[~2023-10-09 5:51 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-05 23:08 [PATCH v2 00/18] clang-tools support in tools Ian Rogers
2023-10-05 23:08 ` [PATCH v2 01/18] gen_compile_commands: Allow the line prefix to still be cmd_ Ian Rogers
2023-10-05 23:08 ` [PATCH v2 02/18] gen_compile_commands: Sort output compile commands by file name Ian Rogers
2023-10-05 23:08 ` [PATCH v2 03/18] run-clang-tools: Add pass through checks and and header-filter arguments Ian Rogers
2023-10-06 21:22 ` Nick Desaulniers
2023-10-05 23:08 ` [PATCH v2 04/18] perf hisi-ptt: Fix potential memory leak Ian Rogers
2023-10-09 5:41 ` Namhyung Kim
2023-10-09 15:45 ` Ian Rogers
2023-10-05 23:08 ` [PATCH v2 05/18] perf bench uprobe: Fix potential use of memory after free Ian Rogers
2023-10-09 5:51 ` Namhyung Kim [this message]
2023-10-09 16:13 ` Ian Rogers
2023-10-05 23:08 ` [PATCH v2 06/18] perf buildid-cache: Fix use of uninitialized value Ian Rogers
2023-10-09 6:06 ` Namhyung Kim
2023-10-09 16:22 ` Ian Rogers
2023-10-05 23:08 ` [PATCH v2 07/18] perf env: Remove unnecessary NULL tests Ian Rogers
2023-10-09 6:14 ` Namhyung Kim
2023-10-09 16:33 ` Ian Rogers
2023-10-05 23:08 ` [PATCH v2 08/18] perf jitdump: Avoid memory leak Ian Rogers
2023-10-05 23:08 ` [PATCH v2 09/18] perf mem-events: Avoid uninitialized read Ian Rogers
2023-10-05 23:08 ` [PATCH v2 10/18] perf dlfilter: Be defensive against potential NULL dereference Ian Rogers
2023-10-09 6:21 ` Namhyung Kim
2023-10-05 23:08 ` [PATCH v2 11/18] perf hists browser: Reorder variables to reduce padding Ian Rogers
2023-10-05 23:08 ` [PATCH v2 12/18] perf hists browser: Avoid potential NULL dereference Ian Rogers
2023-10-05 23:08 ` [PATCH v2 13/18] perf svghelper: Avoid memory leak Ian Rogers
2023-10-09 6:31 ` Namhyung Kim
2023-10-09 16:37 ` Ian Rogers
2023-10-05 23:08 ` [PATCH v2 14/18] perf parse-events: Fix unlikely memory leak when cloning terms Ian Rogers
2023-10-05 23:08 ` [PATCH v2 15/18] tools api: Avoid potential double free Ian Rogers
2023-10-05 23:08 ` [PATCH v2 16/18] perf trace-event-info: Avoid passing NULL value to closedir Ian Rogers
2023-10-05 23:08 ` [PATCH v2 17/18] perf header: Fix various error path memory leaks Ian Rogers
2023-10-09 6:57 ` Namhyung Kim
2023-10-09 17:13 ` Ian Rogers
2023-10-05 23:08 ` [PATCH v2 18/18] perf bpf_counter: Fix a few " Ian Rogers
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