[PATCH v2] examples/qos_meter: fix unchecked return value

[PATCH v2] examples/qos_meter: fix unchecked return value

[Michal Jastrzebski]

From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>

Fix issue reported by Coverity.

Coverity ID 30693: Unchecked return value
check_return: Calling rte_meter_srtcm_config without checking return value.

Fixes: e6541fdec8b2 ("meter: initial import")

Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
---
 examples/qos_meter/main.c | 15 ++++++++++-----
 examples/qos_meter/main.h |  2 +-
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/examples/qos_meter/main.c b/examples/qos_meter/main.c
index b968b00..16b0b87 100644
--- a/examples/qos_meter/main.c
+++ b/examples/qos_meter/main.c
@@ -133,14 +133,17 @@ struct rte_meter_trtcm_params app_trtcm_params[] = {
 
 FLOW_METER app_flows[APP_FLOWS_MAX];
 
-static void
+static int
 app_configure_flow_table(void)
 {
 	uint32_t i, j;
+	int ret = 0;
 
-	for (i = 0, j = 0; i < APP_FLOWS_MAX; i ++, j = (j + 1) % RTE_DIM(PARAMS)){
-		FUNC_CONFIG(&app_flows[i], &PARAMS[j]);
-	}
+	for (i = 0, j = 0; i < APP_FLOWS_MAX;
+			i ++, j = (j + 1) % RTE_DIM(PARAMS))
+		ret |= FUNC_CONFIG(&app_flows[i], &PARAMS[j]);
+
+	return ret;
 }
 
 static inline void
@@ -381,7 +384,9 @@ main(int argc, char **argv)
 	rte_eth_promiscuous_enable(port_tx);
 
 	/* App configuration */
-	app_configure_flow_table();
+	ret = app_configure_flow_table();
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid configure flow table\n");
 
 	/* Launch per-lcore init on every lcore */
 	rte_eal_mp_remote_launch(main_loop, NULL, CALL_MASTER);
diff --git a/examples/qos_meter/main.h b/examples/qos_meter/main.h
index 530bf69..54867dc 100644
--- a/examples/qos_meter/main.h
+++ b/examples/qos_meter/main.h
@@ -51,7 +51,7 @@ enum policer_action policer_table[e_RTE_METER_COLORS][e_RTE_METER_COLORS] =
 #if APP_MODE == APP_MODE_FWD
 
 #define FUNC_METER(a,b,c,d) color, flow_id=flow_id, pkt_len=pkt_len, time=time
-#define FUNC_CONFIG(a,b)
+#define FUNC_CONFIG(a, b) 0
 #define PARAMS	app_srtcm_params
 #define FLOW_METER int
 
-- 
1.9.1

[PATCH v2] examples/qos_sched: fix out-of-bounds read

[Michal Jastrzebski]

From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>

Fix issue reported by Coverity.

Coverity ID 30708: Out-of-bounds read
overrun-local: Overrunning array tokens of 8 8-byte elements
at element index 4294967294 (byte offset 34359738352)
using index i (which evaluates to 4294967294).

Fixes: de3cfa2c9823 ("sched: initial import")

Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
---
 examples/qos_sched/args.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/examples/qos_sched/args.c b/examples/qos_sched/args.c
index 3e7fd08..d819269 100644
--- a/examples/qos_sched/args.c
+++ b/examples/qos_sched/args.c
@@ -175,9 +175,11 @@ app_parse_opt_vals(const char *conf_str, char separator, uint32_t n_vals, uint32
 
 	n_tokens = rte_strsplit(string, strnlen(string, 32), tokens, n_vals, separator);
 
-	for(i = 0; i < n_tokens; i++) {
+	if (n_tokens > MAX_OPT_VALUES)
+		return -1;
+
+	for (i = 0; i < n_tokens; i++)
 		opt_vals[i] = (uint32_t)atol(tokens[i]);
-	}
 
 	free(string);
 
-- 
1.9.1

Re: [PATCH v2] examples/qos_sched: fix out-of-bounds read

[Dumitrescu, Cristian]

> -----Original Message-----
> From: Jastrzebski, MichalX K
> Sent: Thursday, April 21, 2016 12:48 PM
> To: Dumitrescu, Cristian <cristian.dumitrescu@intel.com>; Zhang, Roy Fan
> <roy.fan.zhang@intel.com>; Singh, Jasvinder <jasvinder.singh@intel.com>
> Cc: dev@dpdk.org; Mrozowicz, SlawomirX
> <slawomirx.mrozowicz@intel.com>
> Subject: [PATCH v2] examples/qos_sched: fix out-of-bounds read
> 
> From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> 
> Fix issue reported by Coverity.
> 
> Coverity ID 30708: Out-of-bounds read
> overrun-local: Overrunning array tokens of 8 8-byte elements
> at element index 4294967294 (byte offset 34359738352)
> using index i (which evaluates to 4294967294).
> 
> Fixes: de3cfa2c9823 ("sched: initial import")
> 
> Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> ---
>  examples/qos_sched/args.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/examples/qos_sched/args.c b/examples/qos_sched/args.c
> index 3e7fd08..d819269 100644
> --- a/examples/qos_sched/args.c
> +++ b/examples/qos_sched/args.c
> @@ -175,9 +175,11 @@ app_parse_opt_vals(const char *conf_str, char
> separator, uint32_t n_vals, uint32
> 
>  	n_tokens = rte_strsplit(string, strnlen(string, 32), tokens, n_vals,
> separator);
> 
> -	for(i = 0; i < n_tokens; i++) {
> +	if (n_tokens > MAX_OPT_VALUES)
> +		return -1;
> +
> +	for (i = 0; i < n_tokens; i++)
>  		opt_vals[i] = (uint32_t)atol(tokens[i]);
> -	}
> 
>  	free(string);
> 
> --
> 1.9.1

Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

Re: [PATCH v2] examples/qos_sched: fix out-of-bounds read

[Thomas Monjalon]

> > Fix issue reported by Coverity.
> > 
> > Coverity ID 30708: Out-of-bounds read
> > overrun-local: Overrunning array tokens of 8 8-byte elements
> > at element index 4294967294 (byte offset 34359738352)
> > using index i (which evaluates to 4294967294).
> > 
> > Fixes: de3cfa2c9823 ("sched: initial import")
> > 
> > Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> 
> Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

Applied, thanks

Re: [PATCH v2] examples/qos_sched: fix copy-paste error

[Dumitrescu, Cristian]

> -----Original Message-----
> From: Jastrzebski, MichalX K
> Sent: Thursday, April 21, 2016 12:48 PM
> To: Dumitrescu, Cristian <cristian.dumitrescu@intel.com>; Zhang, Roy Fan
> <roy.fan.zhang@intel.com>; Singh, Jasvinder <jasvinder.singh@intel.com>
> Cc: dev@dpdk.org; Mrozowicz, SlawomirX
> <slawomirx.mrozowicz@intel.com>
> Subject: [PATCH v2] examples/qos_sched: fix copy-paste error
> 
> From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> 
> Coverity ID 30699: Copy-paste error;
> rx_port in pconf->rx_port looks like a copy-paste error.
> 
> Fixes: de3cfa2c9823 ("sched: initial import")
> 
> Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> ---
>  examples/qos_sched/args.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/examples/qos_sched/args.c b/examples/qos_sched/args.c
> index 3e7fd08..1916790 100644
> --- a/examples/qos_sched/args.c
> +++ b/examples/qos_sched/args.c
> @@ -270,7 +270,7 @@ app_parse_flow_conf(const char *conf_str)
>  	}
>  	if (pconf->tx_port >= RTE_MAX_ETHPORTS) {
>  		RTE_LOG(ERR, APP, "pfc %u: invalid tx port %"PRIu8"
> index\n",
> -				nb_pfc, pconf->rx_port);
> +				nb_pfc, pconf->tx_port);
>  		return -1;
>  	}
> 
> --
> 1.9.1

Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

Re: [PATCH v2] examples/qos_sched: fix negative loop bound

[Dumitrescu, Cristian]

> -----Original Message-----
> From: Jastrzebski, MichalX K
> Sent: Thursday, April 21, 2016 12:48 PM
> To: Dumitrescu, Cristian <cristian.dumitrescu@intel.com>; Zhang, Roy Fan
> <roy.fan.zhang@intel.com>; Singh, Jasvinder <jasvinder.singh@intel.com>
> Cc: dev@dpdk.org; Mrozowicz, SlawomirX
> <slawomirx.mrozowicz@intel.com>
> Subject: [PATCH v2] examples/qos_sched: fix negative loop bound
> 
> From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> 
> Coverity ID 30704: Negative loop bound
> negative_returns: Using unsigned variable n_tokens in a loop exit condition.
> 
> Fixes: de3cfa2c9823 ("sched: initial import")
> 
> Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> ---
>  examples/qos_sched/args.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/examples/qos_sched/args.c b/examples/qos_sched/args.c
> index 3e7fd08..7a98e5c 100644
> --- a/examples/qos_sched/args.c
> +++ b/examples/qos_sched/args.c
> @@ -162,7 +162,7 @@ static int
>  app_parse_opt_vals(const char *conf_str, char separator, uint32_t n_vals,
> uint32_t *opt_vals)
>  {
>  	char *string;
> -	uint32_t i, n_tokens;
> +	int i, n_tokens;
>  	char *tokens[MAX_OPT_VALUES];
> 
>  	if (conf_str == NULL || opt_vals == NULL || n_vals == 0 || n_vals >
> MAX_OPT_VALUES)
> --
> 1.9.1

Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

Re: [PATCH v2] examples/qos_meter: fix unchecked return value

[Dumitrescu, Cristian]

> -----Original Message-----
> From: Jastrzebski, MichalX K
> Sent: Thursday, April 21, 2016 12:48 PM
> To: Dumitrescu, Cristian <cristian.dumitrescu@intel.com>; Zhang, Roy Fan
> <roy.fan.zhang@intel.com>; Singh, Jasvinder <jasvinder.singh@intel.com>
> Cc: dev@dpdk.org; Mrozowicz, SlawomirX
> <slawomirx.mrozowicz@intel.com>
> Subject: [PATCH v2] examples/qos_meter: fix unchecked return value
> 
> From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> 
> Fix issue reported by Coverity.
> 
> Coverity ID 30693: Unchecked return value
> check_return: Calling rte_meter_srtcm_config without checking return
> value.
> 
> Fixes: e6541fdec8b2 ("meter: initial import")
> 
> Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
> ---
>  examples/qos_meter/main.c | 15 ++++++++++-----
>  examples/qos_meter/main.h |  2 +-
>  2 files changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/examples/qos_meter/main.c b/examples/qos_meter/main.c
> index b968b00..16b0b87 100644
> --- a/examples/qos_meter/main.c
> +++ b/examples/qos_meter/main.c
> @@ -133,14 +133,17 @@ struct rte_meter_trtcm_params
> app_trtcm_params[] = {
> 
>  FLOW_METER app_flows[APP_FLOWS_MAX];
> 
> -static void
> +static int
>  app_configure_flow_table(void)
>  {
>  	uint32_t i, j;
> +	int ret = 0;
> 
> -	for (i = 0, j = 0; i < APP_FLOWS_MAX; i ++, j = (j + 1) %
> RTE_DIM(PARAMS)){
> -		FUNC_CONFIG(&app_flows[i], &PARAMS[j]);
> -	}
> +	for (i = 0, j = 0; i < APP_FLOWS_MAX;
> +			i ++, j = (j + 1) % RTE_DIM(PARAMS))
> +		ret |= FUNC_CONFIG(&app_flows[i], &PARAMS[j]);
> +
> +	return ret;
>  }


You should probably return of the first error rather than carry on. How would you know which is the flow that produced the configuration error?

for (i = 0, j = 0; i < APP_FLOWS_MAX; i ++, j = (j + 1) % RTE_DIM(PARAMS)){
	ret = FUNC_CONFIG(&app_flows[i], &PARAMS[j]);
	if (ret)
		return;
}

> 
>  static inline void
> @@ -381,7 +384,9 @@ main(int argc, char **argv)
>  	rte_eth_promiscuous_enable(port_tx);
> 
>  	/* App configuration */
> -	app_configure_flow_table();
> +	ret = app_configure_flow_table();
> +	if (ret < 0)
> +		rte_exit(EXIT_FAILURE, "Invalid configure flow table\n");
> 
>  	/* Launch per-lcore init on every lcore */
>  	rte_eal_mp_remote_launch(main_loop, NULL, CALL_MASTER);
> diff --git a/examples/qos_meter/main.h b/examples/qos_meter/main.h
> index 530bf69..54867dc 100644
> --- a/examples/qos_meter/main.h
> +++ b/examples/qos_meter/main.h
> @@ -51,7 +51,7 @@ enum policer_action
> policer_table[e_RTE_METER_COLORS][e_RTE_METER_COLORS] =
>  #if APP_MODE == APP_MODE_FWD
> 
>  #define FUNC_METER(a,b,c,d) color, flow_id=flow_id, pkt_len=pkt_len,
> time=time
> -#define FUNC_CONFIG(a,b)
> +#define FUNC_CONFIG(a, b) 0
>  #define PARAMS	app_srtcm_params
>  #define FLOW_METER int
> 
> --
> 1.9.1