Thanks!

Actually, I do't think this function is useful on the client.
>From the name of it, it would have been used in the server code, but even 
>there it was recently removed as I now see.

I'll submit a removal patch.

On Sep 8, 2014, at 6:38 PM, Dan Carpenter wrote:

> On Tue, Sep 09, 2014 at 12:12:01AM +0200, Hugues wrote:
>> Fix potential buffer underflow
>> 
>> When the string 'name' start with a '-' ptr == name and so --ptr will
>> underflow, this patch corrected this by checking ptr before decrementing.
> 
> Good eye.  Please fix up the changelog and send it inline etc and
> resend.  I've added Oleg and Andreas to the CC list so that this doesn't
> get lost.
> 
> regards,
> dan carpenter
> 
>>> From 5786040323bd1dc3149fb4afbea9f01e2bf4cfdf Mon Sep 17 00:00:00 2001
>> From: Hugues Morisset <morisset.hug...@gmail.com>
>> Date: Mon, 8 Sep 2014 22:59:04 +0200
>> Subject: [PATCH 4/4] staging: lustre: Fix potential buffer underflow
>> 
>> Signed-off-by: Hugues Morisset <morisset.hug...@gmail.com>
>> ---
>> drivers/staging/lustre/lustre/include/obd.h | 7 ++++++-
>> 1 file changed, 6 insertions(+), 1 deletion(-)
>> 
>> diff --git a/drivers/staging/lustre/lustre/include/obd.h 
>> b/drivers/staging/lustre/lustre/include/obd.h
>> index 409eae6..bb67e40 100644
>> --- a/drivers/staging/lustre/lustre/include/obd.h
>> +++ b/drivers/staging/lustre/lustre/include/obd.h
>> @@ -677,7 +677,12 @@ static inline int is_osp_on_mdt(char *name)
>>      if (strncmp(ptr + 1, "MDT", 3) != 0)
>>              return 0;
>> 
>> -    while (*(--ptr) != '-' && ptr != name);
>> +    if (ptr == name)
>> +            return 0;
>> +
>> +    --ptr;
>> +    while (ptr != '-' && ptr != name)
>> +            --ptr;
>> 
>>      if (ptr == name)
>>              return 0;
>> -- 
>> 2.1.0
>> 
> 
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> 

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