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From: Kevin Laatz <kevin.laatz@intel.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>, dev@dpdk.org
Cc: bruce.richardson@intel.com, stable@dpdk.org,
	David Marchand <david.marchand@redhat.com>,
	Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [dpdk-stable] [PATCH] net/ring: fix unchecked return value
Date: Thu, 1 Oct 2020 15:14:52 +0100
Message-ID: <6eceabb8-ab9c-8774-46d9-b5ffef5cdab7@intel.com> (raw)
In-Reply-To: <4801cf86-8a4d-f63f-d240-0176b6b51abb@intel.com>


On 25/09/2020 13:43, Ferruh Yigit wrote:
> On 9/22/2020 6:20 PM, Kevin Laatz wrote:
>> Add a check for the return value of the sscanf call in
>> parse_internal_args(), returning an error if we don't get the expected
>> result.
>>
>> Coverity issue: 362049
>> Fixes: 96cb19521147 ("net/ring: use EAL APIs in PMD specific API")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
>> ---
>>   drivers/net/ring/rte_eth_ring.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ring/rte_eth_ring.c 
>> b/drivers/net/ring/rte_eth_ring.c
>> index 40fe1ca4ba..62060e46ce 100644
>> --- a/drivers/net/ring/rte_eth_ring.c
>> +++ b/drivers/net/ring/rte_eth_ring.c
>> @@ -539,7 +539,8 @@ parse_internal_args(const char *key __rte_unused, 
>> const char *value,
>>       struct ring_internal_args **internal_args = data;
>>       void *args;
>>   -    sscanf(value, "%p", &args);
>> +    if (sscanf(value, "%p", &args) != 1)
>> +        return -1;
>
> I am aware that this is just to fix the coverity error to check the 
> return value, BUT :)
>
> The internal args is mainly to pass the information get by API 
> ('rte_eth_from_ring()') to ring probe. And the main information to 
> pass is the ring.
> It may be possible to pass the ring_name only and eliminate internal 
> args completely, the driver already has a way to pass ring name:
> "nodeaction=name:node:ATTACH" devargs.
>
> If you have time, can you please check if it can be possible to fill 
> and pass the nodeaction devargs in 'rte_eth_from_rings()' and 
> eliminate the 'internal' devargs completely?
> If it works, as a bonus it will resolve above coverity issue by 
> removing it :)
>
Hi Ferruh,

It seems to be used for more than just that - after the parsing, the 
internal args are passed to do_eth_dev_ring_create() as multiple parameters.

- Kevin

  reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-22 17:20 Kevin Laatz
2020-09-23  8:06 ` [dpdk-stable] [dpdk-dev] " David Marchand
2020-09-23  9:39   ` Bruce Richardson
2020-09-23  9:43     ` David Marchand
2020-09-23 10:04       ` Kevin Laatz
2020-09-23 10:25       ` Bruce Richardson
2020-09-25 12:43 ` [dpdk-stable] " Ferruh Yigit
2020-10-01 14:14   ` Kevin Laatz [this message]
2020-10-01 14:51     ` Ferruh Yigit
2020-10-01 17:09 ` [dpdk-stable] [PATCH v2] " Kevin Laatz
2020-10-12 11:57   ` Ferruh Yigit
2020-10-12 12:45     ` Bruce Richardson
2020-10-12 13:04       ` Ferruh Yigit
2020-10-12 13:11         ` Bruce Richardson
2020-10-13 13:07   ` [dpdk-stable] [PATCH v3] " Kevin Laatz
2020-10-13 17:23     ` Ferruh Yigit

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