Re: [patch] nfs: check kmalloc() return

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On 2010-10-28 15:41, Trond Myklebust wrote:
> On Thu, 2010-10-28 at 09:16 +0200, walter harms wrote:
>>
>> Dan Carpenter schrieb:
>>> The decode_and_add_ds() should return NULL on failure.
>>>
>>> Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
>>>
>>> diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
>>> index 51fe64a..098113c 100644
>>> --- a/fs/nfs/nfs4filelayoutdev.c
>>> +++ b/fs/nfs/nfs4filelayoutdev.c
>>> @@ -219,6 +219,8 @@ decode_and_add_ds(__be32 **pp, struct inode *inode)
>>>  		goto out_err;
>>>  	}
>>>  	buf = kmalloc(rlen + 1, GFP_KERNEL);
>>> +	if (!buf)
>>> +		goto out_err;
>>>  	buf[rlen] = '\0';
>>>  	memcpy(buf, r_addr, rlen);
>>>  
>>
>> it seems that r_addr is a string, then kstdup() is emulated here.
>>
>> re,
>>  wh
> 
> Not quite. kstrdup() requires that the argument be a NUL-terminated
> string. The above code doesn't.

Right.  kmemdup is the right one.

Benny

> 
> Trond
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