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From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 4/4] avcodec/evc_ps: Check num_ref_pic_list_in_sps
Date: Thu, 27 Jul 2023 19:38:37 +0200
Message-ID: <20230727173837.GY7802@pb2> (raw)
In-Reply-To: <b4491ec8-3c26-badf-79a1-1de80004ca06@gmail.com>


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On Wed, Jul 26, 2023 at 09:19:10PM -0300, James Almer wrote:
> On 7/26/2023 8:59 PM, Michael Niedermayer wrote:
> > Fixes: out of array write
> > Fixes: 60798/clusterfuzz-testcase-minimized-ffmpeg_BSF_EVC_FRAME_MERGE_fuzzer-4633529766772736
> > 
> > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> > ---
> >   libavcodec/evc_ps.c | 9 +++++++++
> >   1 file changed, 9 insertions(+)
> > 
> > diff --git a/libavcodec/evc_ps.c b/libavcodec/evc_ps.c
> > index 04ee6a45e6..64384a392c 100644
> > --- a/libavcodec/evc_ps.c
> > +++ b/libavcodec/evc_ps.c
> > @@ -243,11 +243,20 @@ int ff_evc_parse_sps(GetBitContext *gb, EVCParamSets *ps)
> >           sps->rpl1_same_as_rpl0_flag = get_bits1(gb);
> >           sps->num_ref_pic_list_in_sps[0] = get_ue_golomb(gb);
> > +        if ((unsigned)sps->num_ref_pic_list_in_sps[0] >= EVC_MAX_NUM_RPLS) {
> 
> EVC_MAX_NUM_RPLS should be 64, not 32 as it's currently defined. So change
> that too and it LGTM.

ok will do

thx for reviewing

[...]
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  reply	other threads:[~2023-07-27 17:38 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-26 23:59 [FFmpeg-devel] [PATCH 1/4] avcodec/rtv1: Check if the minimal size is available in decode_rtv1() Michael Niedermayer
2023-07-26 23:59 ` [FFmpeg-devel] [PATCH 2/4] tools/target_dec_fuzzer: Adjust threshold for rtv1 Michael Niedermayer
2023-07-26 23:59 ` [FFmpeg-devel] [PATCH 3/4] avcodec/vvc_parser: Avoid undefined overflow in POC computation Michael Niedermayer
2023-07-26 23:59 ` [FFmpeg-devel] [PATCH 4/4] avcodec/evc_ps: Check num_ref_pic_list_in_sps Michael Niedermayer
2023-07-27  0:19   ` James Almer
2023-07-27 17:38     ` Michael Niedermayer [this message]
2023-09-22 19:22 ` [FFmpeg-devel] [PATCH 1/4] avcodec/rtv1: Check if the minimal size is available in decode_rtv1() Michael Niedermayer
2023-09-22 19:32   ` Paul B Mahol
2023-09-22 21:26     ` Michael Niedermayer
2023-09-22 21:30       ` Paul B Mahol
2023-09-22 21:52         ` Michael Niedermayer
2023-09-22 22:01           ` Paul B Mahol
2023-09-22 22:33             ` Michael Niedermayer
2023-09-22 22:46               ` Paul B Mahol

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