lkml.org 
[lkml]   [2017]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue
From
Date


On 3/13/2017 17:25, Hans Verkuil wrote:
> On 03/13/2017 06:53 AM, Wu, Songjun wrote:
>>
>>
>> On 3/9/2017 18:57, Hans Verkuil wrote:
>>> Hi Songjun,
>>>
>>> On 08/03/17 03:25, Wu, Songjun wrote:
>>>> Hi Colin,
>>>>
>>>> Thank you for your comment.
>>>> It is a bug, will be fixed in the next patch.
>>>
>>> Do you mean that you will provide a new patch for this? Is there anything
>>> wrong with this patch? It seems reasonable to me.
>>>
>> Hi Hans,
>>
>> I see this patch is merged in git://linuxtv.org/media_tree.git.
>> So I do not need submit isc-pipeline-v3 patch, just submit the patches,
>> based on the current master branch?
>
> Huh? Where do you see that this patch is merged? I don't see it in the media_tree master
> branch.
>
Hi Hans,

I see this patch on the master branch in media_tree.
https://git.linuxtv.org/media_tree.git/tree/drivers/media/platform/atmel/atmel-isc.c

> Regards,
>
> Hans
>
>>
>>> Regards,
>>>
>>> Hans
>>>
>>>>
>>>> On 3/7/2017 22:30, Colin King wrote:
>>>>> From: Colin Ian King <colin.king@canonical.com>
>>>>>
>>>>> The are only HIST_ENTRIES worth of entries in hist_entry however the
>>>>> for-loop is iterating one too many times leasing to a read access off
>>>>> the end off the array ctrls->hist_entry. Fix this by iterating by
>>>>> the correct number of times.
>>>>>
>>>>> Detected by CoverityScan, CID#1415279 ("Out-of-bounds read")
>>>>>
>>>>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
>>>>> ---
>>>>> drivers/media/platform/atmel/atmel-isc.c | 2 +-
>>>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c
>>>>> index b380a7d..7dacf8c 100644
>>>>> --- a/drivers/media/platform/atmel/atmel-isc.c
>>>>> +++ b/drivers/media/platform/atmel/atmel-isc.c
>>>>> @@ -1298,7 +1298,7 @@ static void isc_hist_count(struct isc_device *isc)
>>>>> regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES);
>>>>>
>>>>> *hist_count = 0;
>>>>> - for (i = 0; i <= HIST_ENTRIES; i++)
>>>>> + for (i = 0; i < HIST_ENTRIES; i++)
>>>>> *hist_count += i * (*hist_entry++);
>>>>> }
>>>>>
>>>>>
>>>
>

\
 
 \ /
  Last update: 2017-03-13 10:34    [W:0.169 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site