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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Leo Yan <leo.yan@linaro.org>
Cc: Song Liu <songliubraving@fb.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	linux-kernel@vger.kernel.org, Jin Yao <yao.jin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Andi Kleen <ak@linux.intel.com>,
	Eric Saint-Etienne <eric.saint.etienne@oracle.com>,
	Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
	Ingo Molnar <mingo@redhat.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Alexios Zavras <alexios.zavras@intel.com>,
	Davidlohr Bueso <dave@stgolabs.net>,
	Namhyung Kim <namhyung@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-arm-kernel@lists.infradead.org,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Thomas Richter <tmricht@linux.ibm.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	"David S. Miller" <davem@davemloft.net>,
	Changbin Du <changbin.du@intel.com>,
	Alexey Budankov <alexey.budankov@linux.intel.com>
Subject: Re: [PATCH v1 02/11] perf stat: Smatch: Fix use-after-freed pointer
Date: Wed, 3 Jul 2019 15:18:41 -0300	[thread overview]
Message-ID: <20190703181841.GC10740@kernel.org> (raw)
In-Reply-To: <20190702103420.27540-3-leo.yan@linaro.org>

Em Tue, Jul 02, 2019 at 06:34:11PM +0800, Leo Yan escreveu:
> Based on the following report from Smatch, fix the use-after-freed
> pointer.
> 
>   tools/perf/builtin-stat.c:1353
>   add_default_attributes() warn: passing freed memory 'str'.
> 
> The pointer 'str' has been freed but later it is still passed into the
> function parse_events_print_error().  This patch fixes this
> use-after-freed issue.

thanks, applied.
 
> Signed-off-by: Leo Yan <leo.yan@linaro.org>
> ---
>  tools/perf/builtin-stat.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 8a35fc5a7281..de0f6d0e96a2 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1349,8 +1349,8 @@ static int add_default_attributes(void)
>  				fprintf(stderr,
>  					"Cannot set up top down events %s: %d\n",
>  					str, err);
> -				free(str);
>  				parse_events_print_error(&errinfo, str);
> +				free(str);
>  				return -1;
>  			}
>  		} else {
> -- 
> 2.17.1

-- 

- Arnaldo

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WARNING: multiple messages have this Message-ID (diff)
From: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
To: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Andi Kleen <ak@linux.intel.com>,
	"David S. Miller" <davem@davemloft.net>,
	Davidlohr Bueso <dave@stgolabs.net>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Jin Yao <yao.jin@linux.intel.com>,
	Song Liu <songliubraving@fb.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Alexios Zavras <alexios.zavras@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Changbin Du <changbin.du@intel.com>,
	Eric Saint-Etienne <eric.saint.etienne@oracle.com>,
	Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
	Thomas Richter <tmricht@linux.ibm.com>,
	Alexey Budankov <alexey.budankov@linux.intel.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v1 02/11] perf stat: Smatch: Fix use-after-freed pointer
Date: Wed, 3 Jul 2019 15:18:41 -0300	[thread overview]
Message-ID: <20190703181841.GC10740@kernel.org> (raw)
In-Reply-To: <20190702103420.27540-3-leo.yan@linaro.org>

Em Tue, Jul 02, 2019 at 06:34:11PM +0800, Leo Yan escreveu:
> Based on the following report from Smatch, fix the use-after-freed
> pointer.
> 
>   tools/perf/builtin-stat.c:1353
>   add_default_attributes() warn: passing freed memory 'str'.
> 
> The pointer 'str' has been freed but later it is still passed into the
> function parse_events_print_error().  This patch fixes this
> use-after-freed issue.

thanks, applied.
 
> Signed-off-by: Leo Yan <leo.yan@linaro.org>
> ---
>  tools/perf/builtin-stat.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 8a35fc5a7281..de0f6d0e96a2 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1349,8 +1349,8 @@ static int add_default_attributes(void)
>  				fprintf(stderr,
>  					"Cannot set up top down events %s: %d\n",
>  					str, err);
> -				free(str);
>  				parse_events_print_error(&errinfo, str);
> +				free(str);
>  				return -1;
>  			}
>  		} else {
> -- 
> 2.17.1

-- 

- Arnaldo

  reply	other threads:[~2019-07-03 18:18 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-02 10:34 [PATCH v1 00/11] perf: Fix errors detected by Smatch Leo Yan
2019-07-02 10:34 ` Leo Yan
2019-07-02 10:34 ` [PATCH v1 01/11] perf report: Smatch: Fix potential NULL pointer dereference Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-02 10:34 ` [PATCH v1 02/11] perf stat: Smatch: Fix use-after-freed pointer Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-03 18:18   ` Arnaldo Carvalho de Melo [this message]
2019-07-03 18:18     ` Arnaldo Carvalho de Melo
2019-07-13 10:53   ` [tip:perf/urgent] perf stat: Fix use-after-freed pointer detected by the smatch tool tip-bot for Leo Yan
2019-07-02 10:34 ` [PATCH v1 03/11] perf top: Smatch: Fix potential NULL pointer dereference Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-03 18:30   ` Arnaldo Carvalho de Melo
2019-07-03 18:30     ` Arnaldo Carvalho de Melo
2019-07-13 10:53   ` [tip:perf/urgent] perf top: Fix potential NULL pointer dereference detected by the smatch tool tip-bot for Leo Yan
2019-07-02 10:34 ` [PATCH v1 04/11] perf annotate: Smatch: Fix dereferencing freed memory Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-03 18:43   ` Arnaldo Carvalho de Melo
2019-07-03 18:43     ` Arnaldo Carvalho de Melo
2019-07-13 10:54   ` [tip:perf/urgent] perf annotate: Fix dereferencing freed memory found by the smatch tool tip-bot for Leo Yan
2019-07-02 10:34 ` [PATCH v1 05/11] perf trace: Smatch: Fix potential NULL pointer dereference Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-03 18:46   ` Arnaldo Carvalho de Melo
2019-07-03 18:46     ` Arnaldo Carvalho de Melo
2019-07-13 10:55   ` [tip:perf/urgent] perf trace: Fix potential NULL pointer dereference found by the smatch tool tip-bot for Leo Yan
2019-07-02 10:34 ` [PATCH v1 06/11] perf hists: Smatch: Fix potential NULL pointer dereference Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-02 11:07   ` Jiri Olsa
2019-07-02 11:07     ` Jiri Olsa
2019-07-02 10:34 ` [PATCH v1 07/11] perf map: " Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-13 10:55   ` [tip:perf/urgent] perf map: Fix potential NULL pointer dereference found by smatch tool tip-bot for Leo Yan
2019-07-02 10:34 ` [PATCH v1 08/11] perf session: Smatch: Fix potential NULL pointer dereference Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-03 19:01   ` Arnaldo Carvalho de Melo
2019-07-03 19:01     ` Arnaldo Carvalho de Melo
2019-07-13 10:57   ` [tip:perf/urgent] perf session: Fix potential NULL pointer dereference found by the smatch tool tip-bot for Leo Yan
2019-07-02 10:34 ` [PATCH v1 09/11] perf intel-bts: Smatch: Fix potential NULL pointer dereference Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-02 10:34 ` [PATCH v1 10/11] perf intel-pt: " Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-02 11:07   ` Adrian Hunter
2019-07-02 11:07     ` Adrian Hunter
2019-07-03  1:35     ` Leo Yan
2019-07-03  1:35       ` Leo Yan
2019-07-03  5:19       ` Adrian Hunter
2019-07-03  5:19         ` Adrian Hunter
2019-07-03  8:16         ` Leo Yan
2019-07-03  8:16           ` Leo Yan
2019-07-03 10:00       ` Daniel Thompson
2019-07-03 10:00         ` Daniel Thompson
2019-07-03 10:28         ` Leo Yan
2019-07-03 10:28           ` Leo Yan
2019-07-02 10:34 ` [PATCH v1 11/11] perf cs-etm: " Leo Yan
2019-07-02 10:34   ` Leo Yan
2019-07-02 17:03   ` Mathieu Poirier
2019-07-02 17:03     ` Mathieu Poirier
2019-07-03  8:22     ` Leo Yan
2019-07-03  8:22       ` Leo Yan
2019-07-02 11:07 ` [PATCH v1 00/11] perf: Fix errors detected by Smatch Jiri Olsa
2019-07-02 11:07   ` Jiri Olsa
2019-07-03  1:48   ` Leo Yan
2019-07-03  1:48     ` Leo Yan
2019-07-03 18:18     ` Arnaldo Carvalho de Melo
2019-07-03 18:18       ` Arnaldo Carvalho de Melo
2019-07-04  7:29       ` Leo Yan
2019-07-04  7:29         ` Leo Yan

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