diff mbox series

lib/metrics: fix memory leak

Message ID 20200808163906.8021-1-gaurav1086@gmail.com (mailing list archive)
State Rejected, archived
Delegated to: David Marchand
Headers
Series lib/metrics: fix memory leak |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK
ci/iol-mellanox-Performance success Performance Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-testing success Testing PASS

Commit Message

Gaurav Singh Aug. 8, 2020, 4:39 p.m. UTC 
  fix memory leak

Fixes: c5b7197f66 ("telemetry: move some functions to metrics library")

Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
---
 lib/librte_metrics/rte_metrics_telemetry.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

Comments

Honnappa Nagarahalli Aug. 11, 2020, 9:01 p.m. UTC | #1 
<snip>

> 
> fix memory leak
> 
> Fixes: c5b7197f66 ("telemetry: move some functions to metrics library")
> 
> Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
> ---
>  lib/librte_metrics/rte_metrics_telemetry.c | 21 ++++++++++++++++-----
>  1 file changed, 16 insertions(+), 5 deletions(-)
> 
> diff --git a/lib/librte_metrics/rte_metrics_telemetry.c
> b/lib/librte_metrics/rte_metrics_telemetry.c
> index 289ebae0b..7b6d1063c 100644
> --- a/lib/librte_metrics/rte_metrics_telemetry.c
> +++ b/lib/librte_metrics/rte_metrics_telemetry.c
> @@ -41,12 +41,17 @@ rte_metrics_tel_reg_port_ethdev_to_metrics(uint16_t
> port_id)
>  	}
> 
>  	xstats_names = malloc(sizeof(*xstats_names) * num_xstats);
> +	if (xstats_names == NULL) {
> +		METRICS_LOG_ERR("Failed to malloc memory for
> xstats_names");
> +		return -ENOMEM;
> +	}
> +
>  	eth_xstats_names = malloc(sizeof(struct rte_eth_xstat_name)
>  			* num_xstats);
> -	if (eth_xstats_names == NULL || xstats_names == NULL) {
> -		METRICS_LOG_ERR("Failed to malloc memory for
> xstats_names");
> -		ret = -ENOMEM;
> -		goto free_xstats;
> +	if (eth_xstats_names == NULL) {
> +		METRICS_LOG_ERR("Failed to malloc memory for
> eth_xstats_names");
> +		free(xstats_names);
> +		return -ENOMEM;
>  	}
> 
>  	if (rte_eth_xstats_get_names(port_id,
> @@ -167,9 +172,15 @@ rte_metrics_tel_format_port(uint32_t pid, json_t
> *ports,
>  	}
> 
>  	metrics = malloc(sizeof(struct rte_metric_value) * num_metrics);
> +	if (metrics == NULL) {
> +		METRICS_LOG_ERR("Cannot allocate memory");
> +		return -ENOMEM;
> +	}
> +
>  	names = malloc(sizeof(struct rte_metric_name) * num_metrics);
> -	if (metrics == NULL || names == NULL) {
> +	if (names == NULL) {
>  		METRICS_LOG_ERR("Cannot allocate memory");
> +		free(metrics);
>  		return -ENOMEM;
>  	}
> 
> --
> 2.17.1

Looks good.
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Power, Ciara Sept. 22, 2020, 10:26 a.m. UTC | #2 
Hi Gaurav,


>-----Original Message-----
>From: dev <dev-bounces@dpdk.org> On Behalf Of Honnappa Nagarahalli
>Sent: Tuesday 11 August 2020 22:01
>To: Gaurav Singh <gaurav1086@gmail.com>; dev@dpdk.org
>Cc: nd <nd@arm.com>; Honnappa Nagarahalli
><Honnappa.Nagarahalli@arm.com>; nd <nd@arm.com>
>Subject: Re: [dpdk-dev] [PATCH] lib/metrics: fix memory leak
>
><snip>
>
>>
>> fix memory leak
>>
>> Fixes: c5b7197f66 ("telemetry: move some functions to metrics
>> library")
>>
>> Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
>> ---
>>  lib/librte_metrics/rte_metrics_telemetry.c | 21 ++++++++++++++++-----
>>  1 file changed, 16 insertions(+), 5 deletions(-)


I think this commit message should be more descriptive, and is missing Cc: stable@dpdk.org


>> diff --git a/lib/librte_metrics/rte_metrics_telemetry.c
>> b/lib/librte_metrics/rte_metrics_telemetry.c
>> index 289ebae0b..7b6d1063c 100644
>> --- a/lib/librte_metrics/rte_metrics_telemetry.c
>> +++ b/lib/librte_metrics/rte_metrics_telemetry.c
>> @@ -41,12 +41,17 @@
>> rte_metrics_tel_reg_port_ethdev_to_metrics(uint16_t
>> port_id)
>>  	}
>>
>>  	xstats_names = malloc(sizeof(*xstats_names) * num_xstats);
>> +	if (xstats_names == NULL) {
>> +		METRICS_LOG_ERR("Failed to malloc memory for
>> xstats_names");
>> +		return -ENOMEM;
>> +	}
>> +
>>  	eth_xstats_names = malloc(sizeof(struct rte_eth_xstat_name)
>>  			* num_xstats);
>> -	if (eth_xstats_names == NULL || xstats_names == NULL) {
>> -		METRICS_LOG_ERR("Failed to malloc memory for
>> xstats_names");
>> -		ret = -ENOMEM;
>> -		goto free_xstats;
>> +	if (eth_xstats_names == NULL) {
>> +		METRICS_LOG_ERR("Failed to malloc memory for
>> eth_xstats_names");
>> +		free(xstats_names);
>> +		return -ENOMEM;
>>  	}

Is there a reason for the above changes? I think they are unrelated to 
the memory leak this patch is fixing.

>>  	if (rte_eth_xstats_get_names(port_id,
>> @@ -167,9 +172,15 @@ rte_metrics_tel_format_port(uint32_t pid, json_t
>> *ports,
>>  	}
>>
>>  	metrics = malloc(sizeof(struct rte_metric_value) * num_metrics);
>> +	if (metrics == NULL) {
>> +		METRICS_LOG_ERR("Cannot allocate memory");
>> +		return -ENOMEM;
>> +	}
>> +
>>  	names = malloc(sizeof(struct rte_metric_name) * num_metrics);
>> -	if (metrics == NULL || names == NULL) {
>> +	if (names == NULL) {
>>  		METRICS_LOG_ERR("Cannot allocate memory");
>> +		free(metrics);
>>  		return -ENOMEM;
>>  	}

This does fix the resource leak, but I do think it can be done in a 
simpler way, as shown in the patch I sent to fix the logged coverity issue
for this: https://patchwork.dpdk.org/patch/78052/
I will remove my patch seeing as this patch is fixing the same thing.
 
Thanks,
Ciara

>> --
>> 2.17.1
>
>Looks good.
>Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
David Marchand Oct. 30, 2020, 2:59 p.m. UTC | #3 
Hello Gaurav,

On Tue, Sep 22, 2020 at 12:27 PM Power, Ciara <ciara.power@intel.com> wrote:
> >-----Original Message-----
> >From: dev <dev-bounces@dpdk.org> On Behalf Of Honnappa Nagarahalli
> >Sent: Tuesday 11 August 2020 22:01
> >To: Gaurav Singh <gaurav1086@gmail.com>; dev@dpdk.org
> >Cc: nd <nd@arm.com>; Honnappa Nagarahalli
> ><Honnappa.Nagarahalli@arm.com>; nd <nd@arm.com>
> >Subject: Re: [dpdk-dev] [PATCH] lib/metrics: fix memory leak
> >
> ><snip>
> >
> >>
> >> fix memory leak
> >>
> >> Fixes: c5b7197f66 ("telemetry: move some functions to metrics
> >> library")
> >>
> >> Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
> >> ---
> >>  lib/librte_metrics/rte_metrics_telemetry.c | 21 ++++++++++++++++-----
> >>  1 file changed, 16 insertions(+), 5 deletions(-)
>
>
> I think this commit message should be more descriptive, and is missing Cc: stable@dpdk.org
>
>
> >> diff --git a/lib/librte_metrics/rte_metrics_telemetry.c
> >> b/lib/librte_metrics/rte_metrics_telemetry.c
> >> index 289ebae0b..7b6d1063c 100644
> >> --- a/lib/librte_metrics/rte_metrics_telemetry.c
> >> +++ b/lib/librte_metrics/rte_metrics_telemetry.c
> >> @@ -41,12 +41,17 @@
> >> rte_metrics_tel_reg_port_ethdev_to_metrics(uint16_t
> >> port_id)
> >>      }
> >>
> >>      xstats_names = malloc(sizeof(*xstats_names) * num_xstats);
> >> +    if (xstats_names == NULL) {
> >> +            METRICS_LOG_ERR("Failed to malloc memory for
> >> xstats_names");
> >> +            return -ENOMEM;
> >> +    }
> >> +
> >>      eth_xstats_names = malloc(sizeof(struct rte_eth_xstat_name)
> >>                      * num_xstats);
> >> -    if (eth_xstats_names == NULL || xstats_names == NULL) {
> >> -            METRICS_LOG_ERR("Failed to malloc memory for
> >> xstats_names");
> >> -            ret = -ENOMEM;
> >> -            goto free_xstats;
> >> +    if (eth_xstats_names == NULL) {
> >> +            METRICS_LOG_ERR("Failed to malloc memory for
> >> eth_xstats_names");
> >> +            free(xstats_names);
> >> +            return -ENOMEM;
> >>      }
>
> Is there a reason for the above changes? I think they are unrelated to
> the memory leak this patch is fixing.
>
> >>      if (rte_eth_xstats_get_names(port_id,
> >> @@ -167,9 +172,15 @@ rte_metrics_tel_format_port(uint32_t pid, json_t
> >> *ports,
> >>      }
> >>
> >>      metrics = malloc(sizeof(struct rte_metric_value) * num_metrics);
> >> +    if (metrics == NULL) {
> >> +            METRICS_LOG_ERR("Cannot allocate memory");
> >> +            return -ENOMEM;
> >> +    }
> >> +
> >>      names = malloc(sizeof(struct rte_metric_name) * num_metrics);
> >> -    if (metrics == NULL || names == NULL) {
> >> +    if (names == NULL) {
> >>              METRICS_LOG_ERR("Cannot allocate memory");
> >> +            free(metrics);
> >>              return -ENOMEM;
> >>      }
>
> This does fix the resource leak, but I do think it can be done in a
> simpler way, as shown in the patch I sent to fix the logged coverity issue
> for this: https://patchwork.dpdk.org/patch/78052/
> I will remove my patch seeing as this patch is fixing the same thing.

I agree with Ciara.
Could you respin?

Thanks.
David Marchand Nov. 3, 2020, 9:36 p.m. UTC | #4 
On Fri, Oct 30, 2020 at 3:59 PM David Marchand
<david.marchand@redhat.com> wrote:
> > This does fix the resource leak, but I do think it can be done in a
> > simpler way, as shown in the patch I sent to fix the logged coverity issue
> > for this: https://patchwork.dpdk.org/patch/78052/
> > I will remove my patch seeing as this patch is fixing the same thing.
>
> I agree with Ciara.
> Could you respin?

I went with Ciara patch as it is minimal and ready to be merged.
Thanks.
diff mbox series

Patch

diff --git a/lib/librte_metrics/rte_metrics_telemetry.c b/lib/librte_metrics/rte_metrics_telemetry.c
index 289ebae0b..7b6d1063c 100644
--- a/lib/librte_metrics/rte_metrics_telemetry.c
+++ b/lib/librte_metrics/rte_metrics_telemetry.c
@@ -41,12 +41,17 @@  rte_metrics_tel_reg_port_ethdev_to_metrics(uint16_t port_id)
 	}
 
 	xstats_names = malloc(sizeof(*xstats_names) * num_xstats);
+	if (xstats_names == NULL) {
+		METRICS_LOG_ERR("Failed to malloc memory for xstats_names");
+		return -ENOMEM;
+	}
+
 	eth_xstats_names = malloc(sizeof(struct rte_eth_xstat_name)
 			* num_xstats);
-	if (eth_xstats_names == NULL || xstats_names == NULL) {
-		METRICS_LOG_ERR("Failed to malloc memory for xstats_names");
-		ret = -ENOMEM;
-		goto free_xstats;
+	if (eth_xstats_names == NULL) {
+		METRICS_LOG_ERR("Failed to malloc memory for eth_xstats_names");
+		free(xstats_names);
+		return -ENOMEM;
 	}
 
 	if (rte_eth_xstats_get_names(port_id,
@@ -167,9 +172,15 @@  rte_metrics_tel_format_port(uint32_t pid, json_t *ports,
 	}
 
 	metrics = malloc(sizeof(struct rte_metric_value) * num_metrics);
+	if (metrics == NULL) {
+		METRICS_LOG_ERR("Cannot allocate memory");
+		return -ENOMEM;
+	}
+
 	names = malloc(sizeof(struct rte_metric_name) * num_metrics);
-	if (metrics == NULL || names == NULL) {
+	if (names == NULL) {
 		METRICS_LOG_ERR("Cannot allocate memory");
+		free(metrics);
 		return -ENOMEM;
 	}