[PATCH] app/testpmd: fix indirect action list parameters parsing

Etelson, Gregory getelson at nvidia.com
Thu Nov 9 19:22:37 CET 2023


Hello Ferruh,

>> Indirect actions list arguments parser was configured to place target
>> number into 64bit value, while the code provided 32bits memory.
>>
>
> Hi Gregory,
>
> Can you please give more details why 'id' needs to be 64 bits, with
> callstack or usecase etc?
> And please describe what is the observed problem with current code?
>

In rte_flow.h, struct rte_flow_action_indirect_list::handle is a pointer.

Testpmd ACTION_INDIRECT_LIST_HANDLE and ACTION_INDIRECT_LIST_CONF tokens
define arguments size as uintptr_t.

On 64 bits system, defining the id variable as 32 bits value
corrupted parse_indlst_id2ptr stack.

I'll change the id definition to uintptr_t to match token in v2.

Regards,
Gregory

>
> Inside 'parse_indlst_id2ptr()',
> 'parse_int()' can work or 32bits and 64bits variables, so that one is OK.
> But both 'port_action_handle_get_by_id()' &
> 'indirect_action_list_conf_get()' gets 'id' as parameter and they get
> 32bits argument, when 'id' is 64bit won't it will be cast to 32bits and
> loose data, should those functions needs to be updated as well.
>
>
>
>> The patch updated variable size for translation results.
>>
>> Fixes: 72a3dec7126f ("ethdev: add indirect flow list action")
>> Signed-off-by: Gregory Etelson <getelson at nvidia.com>
>> ---
>>  app/test-pmd/cmdline_flow.c | 5 +++--
>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
>> index 0d521159e9..cf1ca33208 100644
>> --- a/app/test-pmd/cmdline_flow.c
>> +++ b/app/test-pmd/cmdline_flow.c
>> @@ -11331,7 +11331,7 @@ parse_indlst_id2ptr(struct context *ctx, const struct token *token,
>>       struct rte_flow_action *action = ctx->object;
>>       struct rte_flow_action_indirect_list *action_conf;
>>       const struct indlst_conf *indlst_conf;
>> -     uint32_t id;
>> +     uint64_t id;
>>       int ret;
>>
>>       if (!action)
>> @@ -11350,7 +11350,8 @@ parse_indlst_id2ptr(struct context *ctx, const struct token *token,
>>       action_conf->handle = (typeof(action_conf->handle))
>>                               port_action_handle_get_by_id(ctx->port, id);
>>               if (!action_conf->handle) {
>> -                     printf("no indirect list handle for id %u\n", id);
>> +                     printf("no indirect list handle for id %"PRIu64"\n",
>> +                            id);
>>                       return -1;
>>               }
>>               break;
>
>


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