Re: [PATCH] lib/inflate: fix memory leak in inflate_dynamic() on inflate_codes() failure

[Josh Law]

7 Mar 2026 17:12:03 Kuan-Wei Chiu <visitorckw@xxxxxxxxx>:

> Hi Josh,
>
> On Fri, Mar 06, 2026 at 04:16:47PM +0000, Josh Law wrote:
>> When inflate_codes() fails in inflate_dynamic(), the code jumps to the
>> 'out' label which only frees 'll', leaking the Huffman tables 'tl' and
>> 'td'. Restructure the code so that the decoding tables are always freed
>> before reaching the 'out' label.
>>
>> Signed-off-by: Josh Law <objecting@xxxxxxxxxxxxx>
>
> The change itself looks good.
> However, IIRC, this isn't the first time I've complained about the
> following checkpatch.pl warning:
>
> WARNING: From:/Signed-off-by: email address mismatch: 'From: Josh Law <hlcj1234567@xxxxxxxxx>' != 'Signed-off-by: Josh Law <objecting@xxxxxxxxxxxxx>'
>
> Regards,
> Kuan-Wei
>
>> ---
>> lib/inflate.c | 7 +++----
>> 1 file changed, 3 insertions(+), 4 deletions(-)
>>
>> diff --git a/lib/inflate.c b/lib/inflate.c
>> index 5b1e70d0ce8c..ae704e4f64ec 100644
>> --- a/lib/inflate.c
>> +++ b/lib/inflate.c
>> @@ -1009,10 +1009,10 @@ DEBG("dyn5d ");
>> DEBG("dyn6 ");
>>
>>    /* decompress until an end-of-block code */
>> -  if (inflate_codes(tl, td, bl, bd)) {
>> +  if (inflate_codes(tl, td, bl, bd))
>>      ret = 1;
>> -    goto out;
>> -  }
>> +  else
>> +    ret = 0;
>>
>> DEBG("dyn7 ");
>>
>> @@ -1021,7 +1021,6 @@ DEBG("dyn7 ");
>>    huft_free(td);
>>
>>    DEBG(">");
>> -  ret = 0;
>> out:
>>    free(ll);
>>    return ret;
>> --
>> 2.43.0
>>
>>



Hello Kuan, I did take your criticism and I fixed it, (by overriding the from: in the email to the from: in the changelog) but some things fall under the cracks sometimes, Andrew did fix it..

V/R


Josh law