Re: [PATCH] unlz4: always set an error return code on failures

[Jan Beulich]

>>> On 11.11.13 at 03:49, Kyungsik Lee <kyungsik.lee@xxxxxxx> wrote:
> Hello Jan,
> 
> Thanks for the patch.
> 
> On Fri, Nov 08, 2013 at 09:27:09AM +0000, Jan Beulich wrote:
>> "ret", being set to -1 early on, gets cleared by the first invocation
>> of lz4_decompress()/lz4_decompress_unknownoutputsize(), and hence
>> subsequent failures wouldn't be noticed by the caller without setting
>> it back to -1 right after those calls.
>> 
>> Reported-by: Matthew Daley <mattjd@xxxxxxxxx>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> Cc: Kyungsik Lee <kyungsik.lee@xxxxxxx>
>> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
>> 
>> --- a/lib/decompress_unlz4.c
>> +++ b/lib/decompress_unlz4.c
>> @@ -141,6 +141,7 @@ STATIC inline int INIT unlz4(u8 *input, 
>>  			goto exit_2;
>>  		}
>>  
>> +		ret = -1;
>>  		if (flush && flush(outp, dest_len) != dest_len)
>>  			goto exit_2;
>>  		if (output)
>>
> What do you think of adding "ret2" for keeping "ret" error status
> which is set by lz4_decompress*() like below.

I'd be fine with that too, but preferred to submit the smallest
possible (read: one line) patch in this case.

Jan

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