[dpdk-stable] [PATCH v2 1/3] bus/vmbus: fix leak on device scan

[Long Li]

> Subject: [PATCH v2 1/3] bus/vmbus: fix leak on device scan
> 
> Caught running ASAN.
> The device name was leaked on scan.
> rte_device name field being a const, use a local pointer and release in error path.
> 
> Fixes: 831dba47bd36 ("bus/vmbus: add Hyper-V virtual bus support")
> Cc: stable at dpdk.org
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>

Thank you.

Acked-by: Long Li <longli at microsoft.com>

> ---
> Changes since v1:
> - left rte_vmbus_device untouched,
> 
> ---
>  drivers/bus/vmbus/linux/vmbus_bus.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bus/vmbus/linux/vmbus_bus.c
> b/drivers/bus/vmbus/linux/vmbus_bus.c
> index 3c924eee14..68f6cc5742 100644
> --- a/drivers/bus/vmbus/linux/vmbus_bus.c
> +++ b/drivers/bus/vmbus/linux/vmbus_bus.c
> @@ -236,13 +236,14 @@ vmbus_scan_one(const char *name)
>  	char filename[PATH_MAX];
>  	char dirname[PATH_MAX];
>  	unsigned long tmp;
> +	char *dev_name;
> 
>  	dev = calloc(1, sizeof(*dev));
>  	if (dev == NULL)
>  		return -1;
> 
>  	dev->device.bus = &rte_vmbus_bus.bus;
> -	dev->device.name = strdup(name);
> +	dev->device.name = dev_name = strdup(name);
>  	if (!dev->device.name)
>  		goto error;
> 
> @@ -261,6 +262,7 @@ vmbus_scan_one(const char *name)
> 
>  	/* skip non-network devices */
>  	if (rte_uuid_compare(dev->class_id, vmbus_nic_uuid) != 0) {
> +		free(dev_name);
>  		free(dev);
>  		return 0;
>  	}
> @@ -312,6 +314,7 @@ vmbus_scan_one(const char *name)
>  		} else { /* already registered */
>  			VMBUS_LOG(NOTICE,
>  				"%s already registered", name);
> +			free(dev_name);
>  			free(dev);
>  		}
>  		return 0;
> @@ -322,6 +325,7 @@ vmbus_scan_one(const char *name)
>  error:
>  	VMBUS_LOG(DEBUG, "failed");
> 
> +	free(dev_name);
>  	free(dev);
>  	return -1;
>  }
> --
> 2.23.0