From: Ian Rogers <irogers@google.com>
To: "José Expósito" <jose.exposito89@gmail.com>
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
mark.rutland@arm.com, alexander.shishkin@linux.intel.com,
jolsa@redhat.com, namhyung@kernel.org, ak@linux.intel.com,
john.garry@huawei.com, linux-perf-users@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf util: Fix use after free in metric__new
Date: Wed, 8 Dec 2021 09:33:14 -0800 [thread overview]
Message-ID: <CAP-5=fUAR9uSAQGkukqafkoX+jz1fE8f-ziU5WeG59XT53jMWw@mail.gmail.com> (raw)
In-Reply-To: <20211208171113.22089-1-jose.exposito89@gmail.com>
On Wed, Dec 8, 2021 at 9:11 AM José Expósito <jose.exposito89@gmail.com> wrote:
>
> Addresses-Coverity-ID: 1494000
> Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Acked-by: Ian Rogers <irogers@google,com>
This can only happen in the ENOMEM case, but it is a good fix.
Fixes: b85a4d61d302 (perf metric: Allow modifiers on metrics)
Thanks,
Ian
> ---
> tools/perf/util/metricgroup.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
> index fffe02aae3ed..4d2fed3aefd1 100644
> --- a/tools/perf/util/metricgroup.c
> +++ b/tools/perf/util/metricgroup.c
> @@ -209,8 +209,8 @@ static struct metric *metric__new(const struct pmu_event *pe,
> m->metric_name = pe->metric_name;
> m->modifier = modifier ? strdup(modifier) : NULL;
> if (modifier && !m->modifier) {
> - free(m);
> expr__ctx_free(m->pctx);
> + free(m);
> return NULL;
> }
> m->metric_expr = pe->metric_expr;
> --
> 2.25.1
>
next prev parent reply other threads:[~2021-12-08 17:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-08 17:11 [PATCH] perf util: Fix use after free in metric__new José Expósito
2021-12-08 17:33 ` Ian Rogers [this message]
2022-01-14 14:47 ` Arnaldo Carvalho de Melo
2022-01-14 14:48 ` John Garry
2022-01-14 15:00 ` José Expósito
2022-01-14 14:45 ` Arnaldo Carvalho de Melo
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