[dpdk-dev] [PATCH v6 10/16] net/qede: solve broken strncpy
Andy Green
andy at warmcat.com
Tue May 15 01:04:50 CEST 2018
On 05/15/2018 05:14 AM, Ferruh Yigit wrote:
> On 5/14/2018 9:20 PM, Ferruh Yigit wrote:
>> On 5/14/2018 6:00 AM, Andy Green wrote:
>>> /home/agreen/projects/dpdk/drivers/net/qede/qede_main.c: In function
>>> ‘qed_slowpath_start’:
>>> /home/agreen/projects/dpdk/drivers/net/qede/qede_main.c:307:3:
>>> error: ‘strncpy’ output may be truncated copying 12 bytes from a
>>> string of length 127 [-Werror=stringop-truncation]
>>> strncpy((char *)drv_version.name, (const char *)params->name,
>>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> MCP_DRV_VER_STR_SIZE - 4);
>>> ~~~~~~~~~~~~~~~~~~~~~~~~~
>>>
>>> Signed-off-by: Andy Green <andy at warmcat.com>
>>> Fixes: 86a2265e59d7 ("qede: add SRIOV support")
>>> Cc: stable at dpdk.org
>>> ---
>>> drivers/net/qede/qede_main.c | 7 ++++---
>>> 1 file changed, 4 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/drivers/net/qede/qede_main.c b/drivers/net/qede/qede_main.c
>>> index 2333ca073..fcfc32d0d 100644
>>> --- a/drivers/net/qede/qede_main.c
>>> +++ b/drivers/net/qede/qede_main.c
>>> @@ -9,6 +9,7 @@
>>> #include <limits.h>
>>> #include <time.h>
>>> #include <rte_alarm.h>
>>> +#include <rte_string_fns.h>
>>>
>>> #include "qede_ethdev.h"
>>>
>>> @@ -303,9 +304,9 @@ static int qed_slowpath_start(struct ecore_dev *edev,
>>> drv_version.version = (params->drv_major << 24) |
>>> (params->drv_minor << 16) |
>>> (params->drv_rev << 8) | (params->drv_eng);
>>> - /* TBD: strlcpy() */
>>> - strncpy((char *)drv_version.name, (const char *)params->name,
>>> - MCP_DRV_VER_STR_SIZE - 4);
>>> + strlcpy((char *)drv_version.name, (const char *)params->name,
>>> + sizeof(drv_version.name));
>>> + drv_version.name[sizeof(drv_version.name) - 1] = '\0';
>>
>> Why set '\0'? doesn't strlcpy assures it?
Yeah... it's a leftover.
> Will remove this line while applying, with the change:
> Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>
Thanks.
-Andy
>>
>>> rc = ecore_mcp_send_drv_version(hwfn, hwfn->p_main_ptt,
>>> &drv_version);
>>> if (rc) {
>>>
>>
>
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