Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-03-16 Thread Nuo Mi
On Fri, Mar 15, 2024 at 11:05 PM Andreas Rheinhardt <
andreas.rheinha...@outlook.com> wrote:

> Frank Plowman:
> > On 15/03/2024 10:22, Kieran Kunhya wrote:
> >> On Thu, 14 Mar 2024, 22:54 Michael Niedermayer,  >
> >> wrote:
> >>
> >>> On Wed, Feb 07, 2024 at 10:55:18PM +, Kieran Kunhya wrote:
>  On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
> 
> > On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya 
> wrote:
> >
> >> $subj
> >>
> >> As discussed at FOSDEM.
> >>
> >
> > Author of this patch above is forced to FUZZ this decoder until
> > experimental flag is removed.
> >
> 
>  Sure, I will set some fuzzers up over the weekend.
> >>>
> >>> over a month later ...
> >>> has this been done ?
> >>>
> >>>
> >>> thx
> >>>
> >>> [...]
> >>>
> >>
> >> Frank said there was no need as he was doing it himself.
> >>
> >> I do not appreciate your passive aggressive tone.
> >>
> >> Kieran
> >>
> >
> > I have been fuzzing since the end of January.  Various patches have made
> > the decoder much more robust than it was then.  Still getting a crash on
> > occasion, but most are now false positives due to assertion failures
> > rather than segmentation faults or other potential security issues.
> > That being said, the hardware I am using is extremely modest compared to
> > oss-fuzz's.
>
> An assertion failure is not a false positive. Even if it is an av_assert2.
>
Agree, we need to return PATCH_WELCOME for them too.

>
> - Andreas
>
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-03-16 Thread Nuo Mi
On Fri, Mar 15, 2024 at 11:01 PM Frank Plowman 
wrote:

> On 15/03/2024 10:22, Kieran Kunhya wrote:
> > On Thu, 14 Mar 2024, 22:54 Michael Niedermayer, 
> > wrote:
> >
> >> On Wed, Feb 07, 2024 at 10:55:18PM +, Kieran Kunhya wrote:
> >>> On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
> >>>
>  On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:
> 
> > $subj
> >
> > As discussed at FOSDEM.
> >
> 
>  Author of this patch above is forced to FUZZ this decoder until
>  experimental flag is removed.
> 
> >>>
> >>> Sure, I will set some fuzzers up over the weekend.
> >>
> >> over a month later ...
> >> has this been done ?
> >>
> >>
> >> thx
> >>
> >> [...]
> >>
> >
> > Frank said there was no need as he was doing it himself.
> >
> > I do not appreciate your passive aggressive tone.
> >
> > Kieran
> >
>
> I have been fuzzing since the end of January.  Various patches have made
> the decoder much more robust than it was then.  Still getting a crash on
> occasion, but most are now false positives due to assertion failures
> rather than segmentation faults or other potential security issues.
> That being said, the hardware I am using is extremely modest compared to
> oss-fuzz's.
>


>
> --
> Frank
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-03-15 Thread Andreas Rheinhardt
Frank Plowman:
> On 15/03/2024 10:22, Kieran Kunhya wrote:
>> On Thu, 14 Mar 2024, 22:54 Michael Niedermayer, 
>> wrote:
>>
>>> On Wed, Feb 07, 2024 at 10:55:18PM +, Kieran Kunhya wrote:
 On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:

> On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:
>
>> $subj
>>
>> As discussed at FOSDEM.
>>
>
> Author of this patch above is forced to FUZZ this decoder until
> experimental flag is removed.
>

 Sure, I will set some fuzzers up over the weekend.
>>>
>>> over a month later ...
>>> has this been done ?
>>>
>>>
>>> thx
>>>
>>> [...]
>>>
>>
>> Frank said there was no need as he was doing it himself.
>>
>> I do not appreciate your passive aggressive tone.
>>
>> Kieran
>>
> 
> I have been fuzzing since the end of January.  Various patches have made
> the decoder much more robust than it was then.  Still getting a crash on
> occasion, but most are now false positives due to assertion failures
> rather than segmentation faults or other potential security issues.
> That being said, the hardware I am using is extremely modest compared to
> oss-fuzz's.

An assertion failure is not a false positive. Even if it is an av_assert2.

- Andreas

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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-03-15 Thread Frank Plowman
On 15/03/2024 10:22, Kieran Kunhya wrote:
> On Thu, 14 Mar 2024, 22:54 Michael Niedermayer, 
> wrote:
> 
>> On Wed, Feb 07, 2024 at 10:55:18PM +, Kieran Kunhya wrote:
>>> On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
>>>
 On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:

> $subj
>
> As discussed at FOSDEM.
>

 Author of this patch above is forced to FUZZ this decoder until
 experimental flag is removed.

>>>
>>> Sure, I will set some fuzzers up over the weekend.
>>
>> over a month later ...
>> has this been done ?
>>
>>
>> thx
>>
>> [...]
>>
> 
> Frank said there was no need as he was doing it himself.
> 
> I do not appreciate your passive aggressive tone.
> 
> Kieran
> 

I have been fuzzing since the end of January.  Various patches have made
the decoder much more robust than it was then.  Still getting a crash on
occasion, but most are now false positives due to assertion failures
rather than segmentation faults or other potential security issues.
That being said, the hardware I am using is extremely modest compared to
oss-fuzz's.

-- 
Frank
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-03-15 Thread Kieran Kunhya
On Thu, 14 Mar 2024, 22:54 Michael Niedermayer, 
wrote:

> On Wed, Feb 07, 2024 at 10:55:18PM +, Kieran Kunhya wrote:
> > On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
> >
> > > On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:
> > >
> > > > $subj
> > > >
> > > > As discussed at FOSDEM.
> > > >
> > >
> > > Author of this patch above is forced to FUZZ this decoder until
> > > experimental flag is removed.
> > >
> >
> > Sure, I will set some fuzzers up over the weekend.
>
> over a month later ...
> has this been done ?
>
>
> thx
>
> [...]
>

Frank said there was no need as he was doing it himself.

I do not appreciate your passive aggressive tone.

Kieran

>
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-03-14 Thread Michael Niedermayer
On Wed, Feb 07, 2024 at 10:55:18PM +, Kieran Kunhya wrote:
> On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
> 
> > On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:
> >
> > > $subj
> > >
> > > As discussed at FOSDEM.
> > >
> >
> > Author of this patch above is forced to FUZZ this decoder until
> > experimental flag is removed.
> >
> 
> Sure, I will set some fuzzers up over the weekend.

over a month later ...
has this been done ?


thx

[...]
-- 
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Why not whip the teacher when the pupil misbehaves? -- Diogenes of Sinope


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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-03-13 Thread James Almer

On 2/14/2024 10:41 AM, Kieran Kunhya wrote:

On Wed, 14 Feb 2024 at 11:47, Andreas Rheinhardt <
andreas.rheinha...@outlook.com> wrote:


Kieran Kunhya:

 From 15c9311c49ebbe87fc4517b67cb73b3079ec3510 Mon Sep 17 00:00:00 2001
From: Kieran Kunhya 
Date: Wed, 7 Feb 2024 21:10:08 +
Subject: [PATCH] vvcdec: Mark as experimental

---
  libavcodec/vvc/vvcdec.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/vvc/vvcdec.c b/libavcodec/vvc/vvcdec.c
index 8163b5e..e0554c6 100644
--- a/libavcodec/vvc/vvcdec.c
+++ b/libavcodec/vvc/vvcdec.c
@@ -1011,7 +1011,7 @@ const FFCodec ff_vvc_decoder = {
  .close  = vvc_decode_free,
  FF_CODEC_DECODE_CB(vvc_decode_frame),
  .flush  = vvc_decode_flush,
-.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |

AV_CODEC_CAP_OTHER_THREADS,

+.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |

AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_EXPERIMENTAL,

  .caps_internal  = FF_CODEC_CAP_EXPORTS_CROPPING |

FF_CODEC_CAP_INIT_CLEANUP |

FF_CODEC_CAP_AUTO_THREADS,
  .p.profiles = NULL_IF_CONFIG_SMALL(ff_vvc_profiles),


Did you run FATE with that? If I am not mistaken, all the VVC decoding
tests (and probably also tests where the VVC decoder is only used to get
stream parameters) will fail (in avcodec_open2()) now, because
strict_std_compliance does by default not allow experimental codecs.



I am aware, it was more to see if there were any objections to the FOSDEM
decision to make it experimental.

Kieran


I'll apply this patch soon (with the addition of forcing the vvc decoder 
and -strict experimental for the tests).

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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-14 Thread Kieran Kunhya
On Wed, 14 Feb 2024 at 11:47, Andreas Rheinhardt <
andreas.rheinha...@outlook.com> wrote:

> Kieran Kunhya:
> > From 15c9311c49ebbe87fc4517b67cb73b3079ec3510 Mon Sep 17 00:00:00 2001
> > From: Kieran Kunhya 
> > Date: Wed, 7 Feb 2024 21:10:08 +
> > Subject: [PATCH] vvcdec: Mark as experimental
> >
> > ---
> >  libavcodec/vvc/vvcdec.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/libavcodec/vvc/vvcdec.c b/libavcodec/vvc/vvcdec.c
> > index 8163b5e..e0554c6 100644
> > --- a/libavcodec/vvc/vvcdec.c
> > +++ b/libavcodec/vvc/vvcdec.c
> > @@ -1011,7 +1011,7 @@ const FFCodec ff_vvc_decoder = {
> >  .close  = vvc_decode_free,
> >  FF_CODEC_DECODE_CB(vvc_decode_frame),
> >  .flush  = vvc_decode_flush,
> > -.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
> AV_CODEC_CAP_OTHER_THREADS,
> > +.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
> AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_EXPERIMENTAL,
> >  .caps_internal  = FF_CODEC_CAP_EXPORTS_CROPPING |
> FF_CODEC_CAP_INIT_CLEANUP |
> >FF_CODEC_CAP_AUTO_THREADS,
> >  .p.profiles = NULL_IF_CONFIG_SMALL(ff_vvc_profiles),
>
> Did you run FATE with that? If I am not mistaken, all the VVC decoding
> tests (and probably also tests where the VVC decoder is only used to get
> stream parameters) will fail (in avcodec_open2()) now, because
> strict_std_compliance does by default not allow experimental codecs.
>

I am aware, it was more to see if there were any objections to the FOSDEM
decision to make it experimental.

Kieran
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-14 Thread Andreas Rheinhardt
Kieran Kunhya:
> From 15c9311c49ebbe87fc4517b67cb73b3079ec3510 Mon Sep 17 00:00:00 2001
> From: Kieran Kunhya 
> Date: Wed, 7 Feb 2024 21:10:08 +
> Subject: [PATCH] vvcdec: Mark as experimental
> 
> ---
>  libavcodec/vvc/vvcdec.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libavcodec/vvc/vvcdec.c b/libavcodec/vvc/vvcdec.c
> index 8163b5e..e0554c6 100644
> --- a/libavcodec/vvc/vvcdec.c
> +++ b/libavcodec/vvc/vvcdec.c
> @@ -1011,7 +1011,7 @@ const FFCodec ff_vvc_decoder = {
>  .close  = vvc_decode_free,
>  FF_CODEC_DECODE_CB(vvc_decode_frame),
>  .flush  = vvc_decode_flush,
> -.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | 
> AV_CODEC_CAP_OTHER_THREADS,
> +.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | 
> AV_CODEC_CAP_OTHER_THREADS | AV_CODEC_CAP_EXPERIMENTAL,
>  .caps_internal  = FF_CODEC_CAP_EXPORTS_CROPPING | 
> FF_CODEC_CAP_INIT_CLEANUP |
>FF_CODEC_CAP_AUTO_THREADS,
>  .p.profiles = NULL_IF_CONFIG_SMALL(ff_vvc_profiles),

Did you run FATE with that? If I am not mistaken, all the VVC decoding
tests (and probably also tests where the VVC decoder is only used to get
stream parameters) will fail (in avcodec_open2()) now, because
strict_std_compliance does by default not allow experimental codecs.

- Andreas

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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-14 Thread Kieran Kunhya
On Wed, 14 Feb 2024, 02:58 Nuo Mi,  wrote:

> >
> >
> >>>
> >>> If there are no objections, I'll push it tomorrow.
> > thank you, Kieran and Paul.
> >
> Hi Kieran,
> Patchwork didn't get your patch.
> I've checked the fate status locally, and it indicates that "make fate-vvc"
> will fail.
> Could you please send a new one to the patchwork?
>
> Thank you.
>

I am not sure how to do that on Windows unfortunately. Patchwork doesn't
seem to support attachment patches.

Kieran

>
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-13 Thread Nuo Mi
>
>
>>>
>>> If there are no objections, I'll push it tomorrow.
> thank you, Kieran and Paul.
>
Hi Kieran,
Patchwork didn't get your patch.
I've checked the fate status locally, and it indicates that "make fate-vvc"
will fail.
Could you please send a new one to the patchwork?

Thank you.
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-12 Thread Nuo Mi
On Fri, Feb 9, 2024 at 11:54 AM Nuo Mi  wrote:

>
>
> On Fri, Feb 9, 2024 at 2:16 AM Kieran Kunhya  wrote:
>
>> On Thu, 8 Feb 2024 at 06:01, Nuo Mi  wrote:
>>
>> > On Thu, Feb 8, 2024 at 6:55 AM Kieran Kunhya  wrote:
>> >
>> > > On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
>> > >
>> > > > On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya 
>> wrote:
>> > > >
>> > > > > $subj
>> > > > >
>> > > > > As discussed at FOSDEM.
>>
> If there are no objections, I'll push it tomorrow.
thank you, Kieran and Paul.
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-08 Thread Nuo Mi
On Fri, Feb 9, 2024 at 2:16 AM Kieran Kunhya  wrote:

> On Thu, 8 Feb 2024 at 06:01, Nuo Mi  wrote:
>
> > On Thu, Feb 8, 2024 at 6:55 AM Kieran Kunhya  wrote:
> >
> > > On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
> > >
> > > > On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya 
> wrote:
> > > >
> > > > > $subj
> > > > >
> > > > > As discussed at FOSDEM.
> > > > >
> > > >
> > > > Author of this patch above is forced to FUZZ this decoder until
> > > > experimental flag is removed.
> > > >
> > >
> > > Sure, I will set some fuzzers up over the weekend.
> > >
> > Better add something here
> > https://ffmpeg.org/developer.html#New-codecs-or-formats-checklist to
> > explain to people what kind of new codecs should be treated as
> experimental
> > and how they can graduate from experimental status.
> >
>
> Hi Nuo,
>
> Sure, this isn't saying your incredible work is bad. It's just the reality
> that a complex codec needs to be fuzzed heavily otherwise the security
> community will report FFmpeg 7.0 has a ton of security issues.
>
Hi  Kieran,
Don't overthink it; I have no ego in this matter. I fully support you.
The checklist was incredibly helpful for me, and I believe documenting the
steps will assist other new codec developers too

>
> Regards,
> Kieran Kunhya
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-08 Thread Kieran Kunhya
On Thu, 8 Feb 2024 at 06:01, Nuo Mi  wrote:

> On Thu, Feb 8, 2024 at 6:55 AM Kieran Kunhya  wrote:
>
> > On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
> >
> > > On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:
> > >
> > > > $subj
> > > >
> > > > As discussed at FOSDEM.
> > > >
> > >
> > > Author of this patch above is forced to FUZZ this decoder until
> > > experimental flag is removed.
> > >
> >
> > Sure, I will set some fuzzers up over the weekend.
> >
> Better add something here
> https://ffmpeg.org/developer.html#New-codecs-or-formats-checklist to
> explain to people what kind of new codecs should be treated as experimental
> and how they can graduate from experimental status.
>

Hi Nuo,

Sure, this isn't saying your incredible work is bad. It's just the reality
that a complex codec needs to be fuzzed heavily otherwise the security
community will report FFmpeg 7.0 has a ton of security issues.

Regards,
Kieran Kunhya
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-07 Thread Nuo Mi
On Thu, Feb 8, 2024 at 6:55 AM Kieran Kunhya  wrote:

> On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:
>
> > On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:
> >
> > > $subj
> > >
> > > As discussed at FOSDEM.
> > >
> >
> > Author of this patch above is forced to FUZZ this decoder until
> > experimental flag is removed.
> >
>
> Sure, I will set some fuzzers up over the weekend.
>
Better add something here
https://ffmpeg.org/developer.html#New-codecs-or-formats-checklist to
explain to people what kind of new codecs should be treated as experimental
and how they can graduate from experimental status.

>
> Kieran
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-07 Thread Kieran Kunhya
On Wed, 7 Feb 2024 at 22:06, Paul B Mahol  wrote:

> On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:
>
> > $subj
> >
> > As discussed at FOSDEM.
> >
>
> Author of this patch above is forced to FUZZ this decoder until
> experimental flag is removed.
>

Sure, I will set some fuzzers up over the weekend.

Kieran
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Re: [FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-07 Thread Paul B Mahol
On Wed, Feb 7, 2024 at 10:13 PM Kieran Kunhya  wrote:

> $subj
>
> As discussed at FOSDEM.
>

Author of this patch above is forced to FUZZ this decoder until
experimental flag is removed.


>
> Kieran
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[FFmpeg-devel] [PATCH] vvcdec: Mark as experimental

2024-02-07 Thread Kieran Kunhya
$subj

As discussed at FOSDEM.

Kieran


0001-vvcdec-Mark-as-experimental.patch
Description: Binary data
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