diff mbox

[dpdk-dev,v4] af_packet: Fix some klocwork errors

Message ID 1425872941-26481-1-git-send-email-changchun.ouyang@intel.com (mailing list archive)
State Superseded, archived
Headers

Commit Message

Ouyang Changchun March 9, 2015, 3:49 a.m. UTC 
Fix possible memory leak issue: free kvlist before return;
Fix possible resource lost issue: close qssockfd before return;

Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
---
Change in v4:
  - Check sockfd in internals->rx_queue against 0.

Change in v3:
  - Also close sockets for all queues.
 
Change in v2:
  - Make the error exit point a common path.

 lib/librte_pmd_af_packet/rte_eth_af_packet.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

Comments

Michael Qiu March 9, 2015, 6:38 a.m. UTC | #1 
On 3/9/2015 11:49 AM, Ouyang Changchun wrote:
> Fix possible memory leak issue: free kvlist before return;
> Fix possible resource lost issue: close qssockfd before return;
>
> Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
> ---
> Change in v4:
>   - Check sockfd in internals->rx_queue against 0.
>
> Change in v3:
>   - Also close sockets for all queues.
>  
> Change in v2:
>   - Make the error exit point a common path.
>
>  lib/librte_pmd_af_packet/rte_eth_af_packet.c | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/lib/librte_pmd_af_packet/rte_eth_af_packet.c b/lib/librte_pmd_af_packet/rte_eth_af_packet.c
> index 80e9bdf..acdf408 100644
> --- a/lib/librte_pmd_af_packet/rte_eth_af_packet.c
> +++ b/lib/librte_pmd_af_packet/rte_eth_af_packet.c
> @@ -691,9 +691,14 @@ error:
>  				rte_free((*internals)->rx_queue[q].rd);
>  			if ((*internals)->tx_queue[q].rd)
>  				rte_free((*internals)->tx_queue[q].rd);
> +			if (((*internals)->rx_queue[q].sockfd != 0) &&
> +				((*internals)->rx_queue[q].sockfd != qsockfd))
> +				close((*internals)->rx_queue[q].sockfd);
>  		}
>  		rte_free(*internals);
>  	}
> +	if (qsockfd != -1)

Hi, Ouyang

qsockfd was first initialized:
for (q = 0; q < nb_queues; q++) {
                /* Open an AF_PACKET socket for this queue... */
                qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));

What will happen if gets an error before here, is there any issue? I
think better to initialize it when declare it.

Thanks,
Michael
> +		close(qsockfd);
>  	return -1;
>  }
>  
> @@ -823,16 +828,21 @@ rte_pmd_af_packet_devinit(const char *name, const char *params)
>  		ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
>  		                         &open_packet_iface, &sockfd);
>  		if (ret < 0)
> -			return -1;
> +			goto error;
>  	}
>  
>  	ret = rte_eth_from_packet(name, &sockfd, numa_node, kvlist);
>  	close(sockfd); /* no longer needed */
>  
>  	if (ret < 0)
> -		return -1;
> +		goto error;
>  
> +	rte_kvargs_free(kvlist);
>  	return 0;
> +
> +error:
> +	rte_kvargs_free(kvlist);
> +	return -1;
>  }
>  
>  static struct rte_driver pmd_af_packet_drv = {
Ouyang Changchun March 9, 2015, 8:47 a.m. UTC | #2 
Hi Michael,

> -----Original Message-----
> From: Qiu, Michael
> Sent: Monday, March 9, 2015 2:39 PM
> To: Ouyang, Changchun; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v4] af_packet: Fix some klocwork errors
> 
> On 3/9/2015 11:49 AM, Ouyang Changchun wrote:
> > Fix possible memory leak issue: free kvlist before return; Fix
> > possible resource lost issue: close qssockfd before return;
> >
> > Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
> > ---
> > Change in v4:
> >   - Check sockfd in internals->rx_queue against 0.
> >
> > Change in v3:
> >   - Also close sockets for all queues.
> >
> > Change in v2:
> >   - Make the error exit point a common path.
> >
> >  lib/librte_pmd_af_packet/rte_eth_af_packet.c | 14 ++++++++++++--
> >  1 file changed, 12 insertions(+), 2 deletions(-)
> >
> > diff --git a/lib/librte_pmd_af_packet/rte_eth_af_packet.c
> > b/lib/librte_pmd_af_packet/rte_eth_af_packet.c
> > index 80e9bdf..acdf408 100644
> > --- a/lib/librte_pmd_af_packet/rte_eth_af_packet.c
> > +++ b/lib/librte_pmd_af_packet/rte_eth_af_packet.c
> > @@ -691,9 +691,14 @@ error:
> >  				rte_free((*internals)->rx_queue[q].rd);
> >  			if ((*internals)->tx_queue[q].rd)
> >  				rte_free((*internals)->tx_queue[q].rd);
> > +			if (((*internals)->rx_queue[q].sockfd != 0) &&
> > +				((*internals)->rx_queue[q].sockfd !=
> qsockfd))
> > +				close((*internals)->rx_queue[q].sockfd);
> >  		}
> >  		rte_free(*internals);
> >  	}
> > +	if (qsockfd != -1)
> 
> Hi, Ouyang
> 
> qsockfd was first initialized:
> for (q = 0; q < nb_queues; q++) {
>                 /* Open an AF_PACKET socket for this queue... */
>                 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
> 
> What will happen if gets an error before here, is there any issue? I think
> better to initialize it when declare it.
>
Make sense,  will make next version to resolve it
Thanks
Changchun
diff mbox

Patch

diff --git a/lib/librte_pmd_af_packet/rte_eth_af_packet.c b/lib/librte_pmd_af_packet/rte_eth_af_packet.c
index 80e9bdf..acdf408 100644
--- a/lib/librte_pmd_af_packet/rte_eth_af_packet.c
+++ b/lib/librte_pmd_af_packet/rte_eth_af_packet.c
@@ -691,9 +691,14 @@  error:
 				rte_free((*internals)->rx_queue[q].rd);
 			if ((*internals)->tx_queue[q].rd)
 				rte_free((*internals)->tx_queue[q].rd);
+			if (((*internals)->rx_queue[q].sockfd != 0) &&
+				((*internals)->rx_queue[q].sockfd != qsockfd))
+				close((*internals)->rx_queue[q].sockfd);
 		}
 		rte_free(*internals);
 	}
+	if (qsockfd != -1)
+		close(qsockfd);
 	return -1;
 }
 
@@ -823,16 +828,21 @@  rte_pmd_af_packet_devinit(const char *name, const char *params)
 		ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
 		                         &open_packet_iface, &sockfd);
 		if (ret < 0)
-			return -1;
+			goto error;
 	}
 
 	ret = rte_eth_from_packet(name, &sockfd, numa_node, kvlist);
 	close(sockfd); /* no longer needed */
 
 	if (ret < 0)
-		return -1;
+		goto error;
 
+	rte_kvargs_free(kvlist);
 	return 0;
+
+error:
+	rte_kvargs_free(kvlist);
+	return -1;
 }
 
 static struct rte_driver pmd_af_packet_drv = {