Re: [PATCH] ntfs3: fix memory leak in indx_create_allocate()

[Konstantin Komarov <almaz.alexandrovich@paragon-software.com>]

On 3/31/26 10:49, Deepanshu Kartikey wrote:

> On Mon, Mar 23, 2026 at 10:51 AM Deepanshu Kartikey
> <kartikey406@gmail.com> wrote:
>> When indx_create_allocate() fails after
>> attr_allocate_clusters() succeeds, run_deallocate()
>> frees the disk clusters but never frees the memory
>> allocated by run_add_entry() via kvmalloc() for the
>> runs_tree structure.
>>
>> Fix this by adding run_close() at the out: label to
>> free the run.runs memory on all error paths. The
>> success path is unaffected as it returns 0 directly
>> without going through out:, transferring ownership
>> of the run memory to indx->alloc_run via memcpy().
>>
>> Reported-by: syzbot+7adcddaeeb860e5d3f2f@syzkaller.appspotmail.com
>> Closes: https://syzkaller.appspot.com/bug?extid=7adcddaeeb860e5d3f2f
>> Signed-off-by: Deepanshu Kartikey <Kartikey406@gmail.com>
>> ---
>>   fs/ntfs3/index.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
>> index 97f06c26fe1a..11f59d7b9ea4 100644
>> --- a/fs/ntfs3/index.c
>> +++ b/fs/ntfs3/index.c
>> @@ -1481,6 +1481,7 @@ static int indx_create_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
>>          run_deallocate(sbi, &run, false);
>>
>>   out:
>> +       run_close(&run);
>>          return err;
>>   }
>>
>> --
>> 2.43.0
>>
> Hi Almaz,
>
> Gentle ping on this patch . I have submitted this patch on 23 March
> 2026 and this patch has been tested by sysbot.
>
> Please let me know if anything else required
>
> Thanks

Hello,

Your patch is applied, thanks for your work.

Regards,
Konstantin