linux-kernel - Re: [PATCH][next] fs/ntfs3: Fix a memory leak on object opts

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Date:   Mon, 20 Sep 2021 19:12:56 +0300
From:   Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To:     Kari Argillander <kari.argillander@...il.com>,
        Colin King <colin.king@...onical.com>
CC:     <ntfs3@...ts.linux.dev>, <kernel-janitors@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][next] fs/ntfs3: Fix a memory leak on object opts



On 10.09.2021 13:50, Kari Argillander wrote:
> On Fri, Sep 10, 2021 at 11:02:02AM +0100, Colin King wrote:
>> From: Colin Ian King <colin.king@...onical.com>
>>
>> Currently a failed allocation on sbi->upcase will cause an exit via
>> the label free_sbi causing a memory leak on object opts. Fix this by
>> re-ordering the exit paths free_opts and free_sbi so that kfree's occur
>> in the reverse allocation order.
>>
>> Addresses-Coverity: ("Resource leak")
>> Fixes: 27fac77707a1 ("fs/ntfs3: Init spi more in init_fs_context than fill_super")
>> Signed-off-by: Colin Ian King <colin.king@...onical.com>
>> ---
> 
> Thanks Colin.
> 
> Reviewed-by: Kari Argillander <kari.argillander@...il.com>
> 
>>  fs/ntfs3/super.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
>> index 3cba0b5e7ac7..69f23db0d727 100644
>> --- a/fs/ntfs3/super.c
>> +++ b/fs/ntfs3/super.c
>> @@ -1450,10 +1450,10 @@ static int ntfs_init_fs_context(struct fs_context *fc)
>>  	fc->ops = &ntfs_context_ops;
>>  
>>  	return 0;
>> -free_opts:
>> -	kfree(opts);
>>  free_sbi:
>>  	kfree(sbi);
>> +free_opts:
>> +	kfree(opts);
>>  	return -ENOMEM;
>>  }
>>  
>> -- 
>> 2.32.0
>>

Hi, Colin, Kari!

Thanks for work - applied!