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Groups > linux.kernel > #1594313 > unrolled thread
| Started by | Colin King <colin.king@canonical.com> |
|---|---|
| First post | 2017-03-07 16:00 +0100 |
| Last post | 2017-03-13 11:30 +0100 |
| Articles | 10 — 5 participants |
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[PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue Colin King <colin.king@canonical.com> - 2017-03-07 16:00 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue "Wu, Songjun" <Songjun.Wu@microchip.com> - 2017-03-08 03:40 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue Hans Verkuil <hverkuil@xs4all.nl> - 2017-03-09 12:00 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue Colin Ian King <colin.king@canonical.com> - 2017-03-09 13:00 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue "Wu, Songjun" <Songjun.Wu@microchip.com> - 2017-03-13 03:20 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue walter harms <wharms@bfs.de> - 2017-03-09 13:00 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue "Wu, Songjun" <Songjun.Wu@microchip.com> - 2017-03-13 07:00 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue Hans Verkuil <hverkuil@xs4all.nl> - 2017-03-13 10:30 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue "Wu, Songjun" <Songjun.Wu@microchip.com> - 2017-03-13 10:40 +0100
Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue Hans Verkuil <hverkuil@xs4all.nl> - 2017-03-13 11:30 +0100
| From | Colin King <colin.king@canonical.com> |
|---|---|
| Date | 2017-03-07 16:00 +0100 |
| Subject | [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tioKJ-w2-1@gated-at.bofh.it> |
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++);
}
--
2.10.2
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| From | "Wu, Songjun" <Songjun.Wu@microchip.com> |
|---|---|
| Date | 2017-03-08 03:40 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tizGa-8kP-7@gated-at.bofh.it> |
| In reply to | #1594313 |
Hi Colin,
Thank you for your comment.
It is a bug, will be fixed in the next patch.
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++);
> }
>
>
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| From | Hans Verkuil <hverkuil@xs4all.nl> |
|---|---|
| Date | 2017-03-09 12:00 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tj3Xz-43h-9@gated-at.bofh.it> |
| In reply to | #1594806 |
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.
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++);
>> }
>>
>>
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| From | Colin Ian King <colin.king@canonical.com> |
|---|---|
| Date | 2017-03-09 13:00 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tj4TE-4Fc-9@gated-at.bofh.it> |
| In reply to | #1595907 |
On 09/03/17 11:49, walter harms wrote:
>
>
> Am 09.03.2017 11:57, schrieb Hans Verkuil:
>> 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.
>>
>> Regards,
>>
>> Hans
>>
>
>
>
> perhaps he will make it a bit more readable, like:
>
> *hist_count += i * (*hist_entry++);
>
> *hist_count += hist_entry[i]*i;
As long as it gets fixed somehow, then I'm happy.
Colin
>
>
> re,
> wh
>>>
>>> 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++);
>>>> }
>>>>
>>>>
>>
>
>
>
>
>> --
>> To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>
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| From | "Wu, Songjun" <Songjun.Wu@microchip.com> |
|---|---|
| Date | 2017-03-13 03:20 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tknKx-1UO-7@gated-at.bofh.it> |
| In reply to | #1595978 |
On 3/9/2017 19:50, Colin Ian King wrote:
> On 09/03/17 11:49, walter harms wrote:
>>
>>
>> Am 09.03.2017 11:57, schrieb Hans Verkuil:
>>> 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.
>>>
>>> Regards,
>>>
>>> Hans
>>>
>>
>>
>>
>> perhaps he will make it a bit more readable, like:
>>
>> *hist_count += i * (*hist_entry++);
>>
>> *hist_count += hist_entry[i]*i;
>
> As long as it gets fixed somehow, then I'm happy.
>
You suggestion is very good, I will modify it like this.
Thank you.
> Colin
>>
>>
>> re,
>> wh
>>>>
>>>> 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++);
>>>>> }
>>>>>
>>>>>
>>>
>>
>>
>>
>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>>
>
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| From | walter harms <wharms@bfs.de> |
|---|---|
| Date | 2017-03-09 13:00 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tj4TE-4Fc-11@gated-at.bofh.it> |
| In reply to | #1595907 |
Am 09.03.2017 11:57, schrieb Hans Verkuil:
> 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.
>
> Regards,
>
> Hans
>
perhaps he will make it a bit more readable, like:
*hist_count += i * (*hist_entry++);
*hist_count += hist_entry[i]*i;
re,
wh
>>
>> 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++);
>>> }
>>>
>>>
>
> --
> To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
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| From | "Wu, Songjun" <Songjun.Wu@microchip.com> |
|---|---|
| Date | 2017-03-13 07:00 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tkrbt-4j8-49@gated-at.bofh.it> |
| In reply to | #1595907 |
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?
> 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++);
>>> }
>>>
>>>
>
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| From | Hans Verkuil <hverkuil@xs4all.nl> |
|---|---|
| Date | 2017-03-13 10:30 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tkusG-6Sd-9@gated-at.bofh.it> |
| In reply to | #1598877 |
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.
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++);
>>>> }
>>>>
>>>>
>>
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| From | "Wu, Songjun" <Songjun.Wu@microchip.com> |
|---|---|
| Date | 2017-03-13 10:40 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tkuCm-6Ws-23@gated-at.bofh.it> |
| In reply to | #1599118 |
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++);
>>>>> }
>>>>>
>>>>>
>>>
>
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| From | Hans Verkuil <hverkuil@xs4all.nl> |
|---|---|
| Date | 2017-03-13 11:30 +0100 |
| Subject | Re: [PATCH] [media] atmel-isc: fix off-by-one comparison and out of bounds read issue |
| Message-ID | <tkvoJ-7zi-9@gated-at.bofh.it> |
| In reply to | #1599145 |
On 03/13/2017 10:32 AM, Wu, Songjun wrote:
>
>
> 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
???
That's a link to the source, not a patch.
And that source still does <= HIST_ENTRIES.
Still confused,
Hans
>
>> 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++);
>>>>>> }
>>>>>>
>>>>>>
>>>>
>>
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