Re: [Xen-devel] [PATCH] common/vsprintf: fix return value when formatting symbolic addresses

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 02/12/2013 13:07, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx> wrote:

> On 02/12/13 12:06, Jan Beulich wrote:
>> When the buffer to be formatted to is too small, the function return
>> value is expected to be the number of characters that would be printed
>> (particularly important if that value is then used for allocating a
>> buffer). Hence incrementing the active pointer must always be
>> independent of actually storing a character.
>> 
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> 
> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Acked-by: Keir Fraser <keir@xxxxxxx>

>> 
>> --- a/xen/common/vsprintf.c
>> +++ b/xen/common/vsprintf.c
>> @@ -294,6 +294,7 @@ static char *pointer(char *str, char *en
>>              /* Print '+<offset>/<len>' */
>>              str = number(str, end, sym_offset, 16, -1, -1,
>> SPECIAL|SIGN|PLUS);
>>              if ( str <= end )
>> -                *str++ = '/';
>> +                *str = '/';
>> +            ++str;
>>              str = number(str, end, sym_size, 16, -1, -1, SPECIAL);
>>          }
>>  
>> 
>> 
>> 
> 
> 



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