net/nfp: fix sprintf with snprintf
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Commit Message
sprintf function is not secure as it doesn't check the length of string.
More secure function snprintf is used.
Fixes: 896c265ef9 ("net/nfp: use new CPP interface")
Fixes: c4171b520b ("net/nfp: support PF multiport")
Cc: stable@dpdk.org
Signed-off-by: Pallantla Poornima <pallantlax.poornima@intel.com>
---
drivers/net/nfp/nfp_net.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
Comments
On 2/4/2019 7:22 AM, Pallantla Poornima wrote:
> sprintf function is not secure as it doesn't check the length of string.
> More secure function snprintf is used.
Can you please update title to reflect what actually fixed, something like:
net/nfp: fix possible buffer overflow
>
> Fixes: 896c265ef9 ("net/nfp: use new CPP interface")
> Fixes: c4171b520b ("net/nfp: support PF multiport")
> Cc: stable@dpdk.org
>
> Signed-off-by: Pallantla Poornima <pallantlax.poornima@intel.com>
> ---
> drivers/net/nfp/nfp_net.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
> index a791e95e2..dd8cae135 100644
> --- a/drivers/net/nfp/nfp_net.c
> +++ b/drivers/net/nfp/nfp_net.c
> @@ -3318,9 +3318,9 @@ nfp_pf_create_dev(struct rte_pci_device *dev, int port, int ports,
> return -ENOMEM;
>
> if (ports > 1)
> - sprintf(port_name, "%s_port%d", dev->device.name, port);
> + snprintf(port_name, 100, "%s_port%d", dev->device.name, port);
> else
> - sprintf(port_name, "%s", dev->device.name);
> + snprintf(port_name, 100, "%s", dev->device.name);
This can be done as strlcat() but I leave this to Alejandro, unless you don't
get his feedback I think good to continue as it is.
<...>
> @@ -3530,8 +3533,9 @@ nfp_fw_setup(struct rte_pci_device *dev, struct nfp_cpp *cpp,
>
> PMD_DRV_LOG(INFO, "Port speed: %u", nfp_eth_table->ports[0].speed);
>
> - sprintf(card_desc, "nic_%s_%dx%d.nffw", nfp_fw_model,
> - nfp_eth_table->count, nfp_eth_table->ports[0].speed / 1000);
> + snprintf(card_desc, sizeof(card_desc), "nic_%s_%dx%d.nffw",
> + nfp_fw_model, nfp_eth_table->count,
> + nfp_eth_table->ports[0].speed / 1000);
Can you please fix the indentation?
@@ -3318,9 +3318,9 @@ nfp_pf_create_dev(struct rte_pci_device *dev, int port, int ports,
return -ENOMEM;
if (ports > 1)
- sprintf(port_name, "%s_port%d", dev->device.name, port);
+ snprintf(port_name, 100, "%s_port%d", dev->device.name, port);
else
- sprintf(port_name, "%s", dev->device.name);
+ snprintf(port_name, 100, "%s", dev->device.name);
if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
@@ -3433,12 +3433,14 @@ nfp_fw_upload(struct rte_pci_device *dev, struct nfp_nsp *nsp, char *card)
/* Looking for firmware file in order of priority */
/* First try to find a firmware image specific for this device */
- sprintf(serial, "serial-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x",
+ snprintf(serial, sizeof(serial),
+ "serial-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x",
cpp->serial[0], cpp->serial[1], cpp->serial[2], cpp->serial[3],
cpp->serial[4], cpp->serial[5], cpp->interface >> 8,
cpp->interface & 0xff);
- sprintf(fw_name, "%s/%s.nffw", DEFAULT_FW_PATH, serial);
+ snprintf(fw_name, sizeof(fw_name), "%s/%s.nffw", DEFAULT_FW_PATH,
+ serial);
PMD_DRV_LOG(DEBUG, "Trying with fw file: %s", fw_name);
fw_f = open(fw_name, O_RDONLY);
@@ -3446,7 +3448,8 @@ nfp_fw_upload(struct rte_pci_device *dev, struct nfp_nsp *nsp, char *card)
goto read_fw;
/* Then try the PCI name */
- sprintf(fw_name, "%s/pci-%s.nffw", DEFAULT_FW_PATH, dev->device.name);
+ snprintf(fw_name, sizeof(fw_name), "%s/pci-%s.nffw", DEFAULT_FW_PATH,
+ dev->device.name);
PMD_DRV_LOG(DEBUG, "Trying with fw file: %s", fw_name);
fw_f = open(fw_name, O_RDONLY);
@@ -3454,7 +3457,7 @@ nfp_fw_upload(struct rte_pci_device *dev, struct nfp_nsp *nsp, char *card)
goto read_fw;
/* Finally try the card type and media */
- sprintf(fw_name, "%s/%s", DEFAULT_FW_PATH, card);
+ snprintf(fw_name, sizeof(fw_name), "%s/%s", DEFAULT_FW_PATH, card);
PMD_DRV_LOG(DEBUG, "Trying with fw file: %s", fw_name);
fw_f = open(fw_name, O_RDONLY);
if (fw_f < 0) {
@@ -3530,8 +3533,9 @@ nfp_fw_setup(struct rte_pci_device *dev, struct nfp_cpp *cpp,
PMD_DRV_LOG(INFO, "Port speed: %u", nfp_eth_table->ports[0].speed);
- sprintf(card_desc, "nic_%s_%dx%d.nffw", nfp_fw_model,
- nfp_eth_table->count, nfp_eth_table->ports[0].speed / 1000);
+ snprintf(card_desc, sizeof(card_desc), "nic_%s_%dx%d.nffw",
+ nfp_fw_model, nfp_eth_table->count,
+ nfp_eth_table->ports[0].speed / 1000);
nsp = nfp_nsp_open(cpp);
if (!nsp) {