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From: Andy Green <andy@warmcat.com>
To: "Shaikh, Shahed" <Shahed.Shaikh@cavium.com>,
	Bruce Richardson <bruce.richardson@intel.com>,
	"dev-bounces@dpdk.org" <dev-bounces@dpdk.org>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy constant and NUL
Date: Wed, 9 May 2018 06:07:09 +0800
Message-ID: <a02e7b38-dfee-1c0d-46bc-65adca288e36@warmcat.com> (raw)
In-Reply-To: <DM2PR07MB1547AADC77E5E7C72B4F71BB9D9A0@DM2PR07MB1547.namprd07.prod.outlook.com>



On 05/09/2018 04:02 AM, Shaikh, Shahed wrote:
>> -----Original Message-----
>> From: dev <dev-bounces@dpdk.org> On Behalf Of Bruce Richardson
>> Sent: Tuesday, May 8, 2018 2:53 PM
>> To: dev-bounces@dpdk.org
>> Cc: Andy Green <andy@warmcat.com>; dev@dpdk.org
>> Subject: Re: [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy constant
>> and NUL
>>
>> On Tue, May 08, 2018 at 05:59:47PM +0000, dev-bounces@dpdk.org wrote:
>>>
>>>
>>>> -----Original Message-----
>>>> From: dev <dev-bounces@dpdk.org> On Behalf Of Andy Green
>>>> Sent: Monday, May 7, 2018 11:30 PM
>>>> To: dev@dpdk.org
>>>> Subject: [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy
>>>> constant and NUL
>>>>
>>>>
>>>> ---
>>>>   drivers/net/qede/base/ecore_int.c |   10 ++++++----
>>>>   1 file changed, 6 insertions(+), 4 deletions(-)
>>>>
>>>> diff --git a/drivers/net/qede/base/ecore_int.c
>>>> b/drivers/net/qede/base/ecore_int.c
>>>> index f43781ba4..c809d84ef 100644
>>>> --- a/drivers/net/qede/base/ecore_int.c
>>>> +++ b/drivers/net/qede/base/ecore_int.c
>>>> @@ -1103,10 +1103,12 @@ static enum _ecore_status_t
>>>> ecore_int_deassertion(struct ecore_hwfn *p_hwfn,
>>>>   						OSAL_SNPRINTF(bit_name, 30,
>>>>   							      p_aeu->bit_name,
>>>>   							      num);
>>>> -					else
>>>> -						OSAL_STRNCPY(bit_name,
>>>> -							     p_aeu->bit_name,
>>>> -							     30);
>>>> +					else {
>>>> +						strncpy(bit_name,
>>>> +							p_aeu->bit_name,
>>>> +							sizeof(bit_name) - 1);
>>>> +						bit_name[sizeof(bit_name) - 1]
>>>> = '\0';
>>>> +					}
>>>
>>> I think you can retain OSAL_STRNCPY and just replace 30 with
>> 'bit_name[sizeof(bit_name) - 1'  and then set last byte with '\0' just like you did.
>>
>> Can that actually be fixed inside OSAL_STRNCPY itself, rather than having each
>> use needing to explicitly null-terminate?
> 
> Although there is only instance of OSAL_STRNCPY, it makes sense to modify it.

Doesn't it make more sense to get rid of OSAL_* that bring nothing at 
all to the party?

#define OSAL_SPRINTF(name, pattern, ...) \
         sprintf(name, pattern, ##__VA_ARGS__)
#define OSAL_SNPRINTF(buf, size, format, ...) \
         snprintf(buf, size, format, ##__VA_ARGS__)
#define OSAL_STRLEN(string) strlen(string)
#define OSAL_STRCPY(dst, string) strcpy(dst, string)
#define OSAL_STRNCPY(dst, string, len) strncpy(dst, string, len)
#define OSAL_STRCMP(str1, str2) strcmp(str1, str2)

Do I miss the point or these are just cruft?

-Andy

> Thanks,
> Shahed
> 

  reply	other threads:[~2018-05-08 22:08 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-08  4:29 [dpdk-dev] [PATCH 00/18] Fix build on gcc8 and various bugs Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 01/18] lib: ret_table: workaround hash function cast error Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 02/18] drivers: bus: pci: fix strncpy dangerous code Andy Green
2018-05-08  8:57   ` Bruce Richardson
2018-05-08  4:29 ` [dpdk-dev] [PATCH 03/18] drivers: bus: dpaa: fix inconsistent struct alignment Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 04/18] drivers: net: axgbe: fix broken eeprom string comp Andy Green
2018-05-08  4:29 ` [dpdk-dev] [PATCH 05/18] drivers: net: nfp: nfpcore: fix strncpy misuse Andy Green
2018-05-08  8:58   ` Bruce Richardson
2018-05-08  9:00     ` Andy Green
2018-05-08  9:03       ` Bruce Richardson
2018-05-08  4:29 ` [dpdk-dev] [PATCH 06/18] drivers: net: nfp: nfpcore fix off-by-one and no NUL on strncpy use Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 07/18] drivers: net: nfp: don't memcpy out of source range Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 08/18] drivers: net: nfp: fix buffer overflow in fw_name Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 09/18] drivers: net: qede: fix strncpy constant and NUL Andy Green
2018-05-08 17:59   ` Shaikh, Shahed
2018-05-08 19:53     ` Bruce Richardson
2018-05-08 20:02       ` Shaikh, Shahed
2018-05-08 22:07         ` Andy Green [this message]
2018-05-08 23:33           ` Shaikh, Shahed
2018-05-08  4:30 ` [dpdk-dev] [PATCH 10/18] drivers: net: qede: fix broken strncpy Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 11/18] drivers:net:sfc: fix strncpy length Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 12/18] drivers: net: sfc: fix another strncpy size and NUL Andy Green
2018-05-08  7:36   ` Andrew Rybchenko
2018-05-08  8:18     ` Andy Green
2018-05-08  9:02       ` Bruce Richardson
2018-05-08  9:08       ` Andrew Rybchenko
2018-05-08  4:30 ` [dpdk-dev] [PATCH 13/18] drivers: net: vdev: readlink inputs cannot be aliased Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 14/18] drivers: net: vdev: fix 3 x strncpy misuse Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 15/18] test-pmd: can't find include Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 16/18] app: fix sprintf overrun bug Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 17/18] app: test-bbdev: strcpy ok for allocated string Andy Green
2018-05-08  4:30 ` [dpdk-dev] [PATCH 18/18] app: test-bbdev: strcpy ok for allocated string 2 Andy Green

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