linux-kernel - Re: [PATCH] reiserfs: kstrdup() memory handling

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Message-ID: <CADa969h6MLbM3vporSjkctBxQwsqphghbXQxAhtyBUeUuqrWQA@mail.gmail.com>
Date:	Sun, 22 Mar 2015 20:12:46 -0400
From:	Sanidhya Kashyap <sanidhya.gatech@...il.com>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	reiserfs-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Kashyap, Sanidhya" <sanidhya@...ech.edu>
Subject: Re: [PATCH] reiserfs: kstrdup() memory handling

On Sat, Mar 21, 2015 at 1:15 PM, Josh Triplett <josh@...htriplett.org> wrote:
> On Sat, Mar 21, 2015 at 01:00:13PM -0400, Sanidhya Kashyap wrote:
>> Checking for ENOMEM even for new_opts in reiserfs_remount function as
>> there is a possibility of nothing being allocated.
>
> You don't need to add a new label; kfree(NULL) is a no-op.
>

Shall I resubmit the patch?

Thanks,
Sanidhya

>> Signed-off-by: Sanidhya Kashyap <sanidhya.gatech@...il.com>
>> ---
>>  fs/reiserfs/super.c | 6 ++++++
>>  1 file changed, 6 insertions(+)
>>
>> diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
>> index 71fbbe3..bf9bc66 100644
>> --- a/fs/reiserfs/super.c
>> +++ b/fs/reiserfs/super.c
>> @@ -1397,6 +1397,11 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
>>       int i;
>>  #endif
>>
>> +     if (!new_opts) {
>> +             err = -ENOMEM;
>> +             goto out_err_no_kfree;
>> +     }
>> +
>>       sync_filesystem(s);
>>       reiserfs_write_lock(s);
>>
>> @@ -1549,6 +1554,7 @@ out_err_unlock:
>>       reiserfs_write_unlock(s);
>>  out_err:
>>       kfree(new_opts);
>> +out_err_no_kfree:
>>       return err;
>>  }
>>
>> --
>> 2.1.0
>>
--
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