Hi Dan,
On 08/21/2015 01:47 AM, Dan Carpenter wrote:
> My static checker assumes that if we are getting numbers as a string
> using kstrotoint() then that means they come from outside the kernel and
> are untrustworthy.
>
> This may or may not be true in this case, but it seems harmless to add
> a range check here.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/crypto/qat/qat_common/adf_transport.c b/drivers/crypto/qat/qat_common/adf_transport.c
> index d5d8198..ec3abf9 100644
> --- a/drivers/crypto/qat/qat_common/adf_transport.c
> +++ b/drivers/crypto/qat/qat_common/adf_transport.c
> @@ -264,6 +264,10 @@ int adf_create_ring(struct adf_accel_dev *accel_dev, const char *section,
> dev_err(&GET_DEV(accel_dev), "Can't get ring number\n");
> return -EFAULT;
> }
> + if (ring_num >= ARRAY_SIZE(bank->rings)) {
> + dev_err(&GET_DEV(accel_dev), "Invalid ring number\n");
> + return -EFAULT;
> + }
>
> bank = &transport_data->banks[bank_num];
> if (adf_reserve_ring(bank, ring_num)) {
>
ACK, although I would use the ADF_ETR_MAX_RINGS_PER_BANK define.
So if you don't mind.
Thanks!
---8<---
Add range check for ring number.
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Tadeusz Struk <tadeusz.struk@xxxxxxxxx>
diff --git a/drivers/crypto/qat/qat_common/adf_transport.c b/drivers/crypto/qat/qat_common/adf_transport.c
index d5d8198..3865ae8 100644
--- a/drivers/crypto/qat/qat_common/adf_transport.c
+++ b/drivers/crypto/qat/qat_common/adf_transport.c
@@ -264,6 +264,10 @@ int adf_create_ring(struct adf_accel_dev *accel_dev, const char *section,
dev_err(&GET_DEV(accel_dev), "Can't get ring number\n");
return -EFAULT;
}
+ if (ring_num >= ADF_ETR_MAX_RINGS_PER_BANK) {
+ dev_err(&GET_DEV(accel_dev), "Invalid ring number\n");
+ return -EFAULT;
+ }
bank = &transport_data->banks[bank_num];
if (adf_reserve_ring(bank, ring_num)) {
--
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