Message ID | KL1PR06MB6426E9B630E0F636B3E10F98AA4B2@KL1PR06MB6426.apcprd06.prod.outlook.com |
---|---|
State | Accepted |
Commit | f7a504a0dfac5efd5e1f5bdc1c596fc798ef4c23 |
Headers | show |
Series | [FFmpeg-devel,v2,1/2] avcodec/vvc_mp4toannexb: check bytes left for nalu_len | expand |
Context | Check | Description |
---|---|---|
yinshiyou/make_loongarch64 | success | Make finished |
yinshiyou/make_fate_loongarch64 | success | Make fate finished |
andriy/make_x86 | success | Make finished |
andriy/make_fate_x86 | success | Make fate finished |
Nuo Mi: > Fixes: fuzzer timeout > Fixes: 65253/clusterfuzz-testcase-minimized-ffmpeg_BSF_VVC_MP4TOANNEXB_fuzzer-4972412487467008 > > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> > --- > libavcodec/bsf/vvc_mp4toannexb.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) > > diff --git a/libavcodec/bsf/vvc_mp4toannexb.c b/libavcodec/bsf/vvc_mp4toannexb.c > index 25c3726918..36bdae8f49 100644 > --- a/libavcodec/bsf/vvc_mp4toannexb.c > +++ b/libavcodec/bsf/vvc_mp4toannexb.c > @@ -155,10 +155,11 @@ static int vvc_extradata_to_annexb(AVBSFContext *ctx) > } > > for (j = 0; j < cnt; j++) { > - int nalu_len = bytestream2_get_be16(&gb); > + const int nalu_len = bytestream2_get_be16(&gb); > > - if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > > - SIZE_MAX - new_extradata_size) { > + if (!nalu_len || > + nalu_len > bytestream2_get_bytes_left(&gb) || > + 4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX - new_extradata_size) { > ret = AVERROR_INVALIDDATA; > goto fail; > } What about growing the packet? - Andreas
On Fri, Feb 9, 2024 at 7:40 PM Andreas Rheinhardt < andreas.rheinhardt@outlook.com> wrote: > Nuo Mi: > > Fixes: fuzzer timeout > > Fixes: > 65253/clusterfuzz-testcase-minimized-ffmpeg_BSF_VVC_MP4TOANNEXB_fuzzer-4972412487467008 > > > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > > Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> > > --- > > libavcodec/bsf/vvc_mp4toannexb.c | 7 ++++--- > > 1 file changed, 4 insertions(+), 3 deletions(-) > > > > diff --git a/libavcodec/bsf/vvc_mp4toannexb.c > b/libavcodec/bsf/vvc_mp4toannexb.c > > index 25c3726918..36bdae8f49 100644 > > --- a/libavcodec/bsf/vvc_mp4toannexb.c > > +++ b/libavcodec/bsf/vvc_mp4toannexb.c > > @@ -155,10 +155,11 @@ static int vvc_extradata_to_annexb(AVBSFContext > *ctx) > > } > > > > for (j = 0; j < cnt; j++) { > > - int nalu_len = bytestream2_get_be16(&gb); > > + const int nalu_len = bytestream2_get_be16(&gb); > > > > - if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > > > - SIZE_MAX - new_extradata_size) { > > + if (!nalu_len || > > + nalu_len > bytestream2_get_bytes_left(&gb) || > > + 4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX > - new_extradata_size) { > > ret = AVERROR_INVALIDDATA; > > goto fail; > > } > > What about growing the packet? > Hi Andreas, Do you mean growing the packet only once for all nalus? However, this would change the original behavior and result in more duplicate code between the HEVC and VVC implementations. I can do it, but I'll refactor duplications to h2656_mp4toannexb.c first. Do you think that's okay? Thank you > - Andreas > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >
Nuo Mi: > On Fri, Feb 9, 2024 at 7:40 PM Andreas Rheinhardt < > andreas.rheinhardt@outlook.com> wrote: > >> Nuo Mi: >>> Fixes: fuzzer timeout >>> Fixes: >> 65253/clusterfuzz-testcase-minimized-ffmpeg_BSF_VVC_MP4TOANNEXB_fuzzer-4972412487467008 >>> >>> Found-by: continuous fuzzing process >> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg >>> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> >>> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> >>> --- >>> libavcodec/bsf/vvc_mp4toannexb.c | 7 ++++--- >>> 1 file changed, 4 insertions(+), 3 deletions(-) >>> >>> diff --git a/libavcodec/bsf/vvc_mp4toannexb.c >> b/libavcodec/bsf/vvc_mp4toannexb.c >>> index 25c3726918..36bdae8f49 100644 >>> --- a/libavcodec/bsf/vvc_mp4toannexb.c >>> +++ b/libavcodec/bsf/vvc_mp4toannexb.c >>> @@ -155,10 +155,11 @@ static int vvc_extradata_to_annexb(AVBSFContext >> *ctx) >>> } >>> >>> for (j = 0; j < cnt; j++) { >>> - int nalu_len = bytestream2_get_be16(&gb); >>> + const int nalu_len = bytestream2_get_be16(&gb); >>> >>> - if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > >>> - SIZE_MAX - new_extradata_size) { >>> + if (!nalu_len || >>> + nalu_len > bytestream2_get_bytes_left(&gb) || >>> + 4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX >> - new_extradata_size) { >>> ret = AVERROR_INVALIDDATA; >>> goto fail; >>> } >> >> What about growing the packet? >> > Hi Andreas, > Do you mean growing the packet only once for all nalus? > However, this would change the original behavior and result in more > duplicate code between the HEVC and VVC implementations. > I can do it, but I'll refactor duplications to h2656_mp4toannexb.c first. > Do you think that's okay? > Thank you > I meant a simple check before growing the packet to ensure that there is enough input left as the header claims there to be. Your original patch added such a check, so I presumed that there is none. But there is one (both here and in hevc_mp4toannexb). So my above point is moot. - Andreas
On Sat, Feb 10, 2024 at 6:57 PM Andreas Rheinhardt < andreas.rheinhardt@outlook.com> wrote: > Nuo Mi: > > On Fri, Feb 9, 2024 at 7:40 PM Andreas Rheinhardt < > > andreas.rheinhardt@outlook.com> wrote: > > > >> Nuo Mi: > >>> Fixes: fuzzer timeout > >>> Fixes: > >> > 65253/clusterfuzz-testcase-minimized-ffmpeg_BSF_VVC_MP4TOANNEXB_fuzzer-4972412487467008 > >>> > >>> Found-by: continuous fuzzing process > >> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > >>> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > >>> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> > >>> --- > >>> libavcodec/bsf/vvc_mp4toannexb.c | 7 ++++--- > >>> 1 file changed, 4 insertions(+), 3 deletions(-) > >>> > >>> diff --git a/libavcodec/bsf/vvc_mp4toannexb.c > >> b/libavcodec/bsf/vvc_mp4toannexb.c > >>> index 25c3726918..36bdae8f49 100644 > >>> --- a/libavcodec/bsf/vvc_mp4toannexb.c > >>> +++ b/libavcodec/bsf/vvc_mp4toannexb.c > >>> @@ -155,10 +155,11 @@ static int vvc_extradata_to_annexb(AVBSFContext > >> *ctx) > >>> } > >>> > >>> for (j = 0; j < cnt; j++) { > >>> - int nalu_len = bytestream2_get_be16(&gb); > >>> + const int nalu_len = bytestream2_get_be16(&gb); > >>> > >>> - if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > > >>> - SIZE_MAX - new_extradata_size) { > >>> + if (!nalu_len || > >>> + nalu_len > bytestream2_get_bytes_left(&gb) || > >>> + 4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX > >> - new_extradata_size) { > >>> ret = AVERROR_INVALIDDATA; > >>> goto fail; > >>> } > >> > >> What about growing the packet? > >> > > Hi Andreas, > > Do you mean growing the packet only once for all nalus? > > However, this would change the original behavior and result in more > > duplicate code between the HEVC and VVC implementations. > > I can do it, but I'll refactor duplications to h2656_mp4toannexb.c first. > > Do you think that's okay? > > Thank you > > > > I meant a simple check before growing the packet to ensure that there is > enough input left as the header claims there to be. Your original patch > added such a check, so I presumed that there is none. But there is one > (both here and in hevc_mp4toannexb). So my above point is moot. Thank you for the explanation. Your suggestion for the original patch is pretty good. Thank you Applied. > > - Andreas > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >
diff --git a/libavcodec/bsf/vvc_mp4toannexb.c b/libavcodec/bsf/vvc_mp4toannexb.c index 25c3726918..36bdae8f49 100644 --- a/libavcodec/bsf/vvc_mp4toannexb.c +++ b/libavcodec/bsf/vvc_mp4toannexb.c @@ -155,10 +155,11 @@ static int vvc_extradata_to_annexb(AVBSFContext *ctx) } for (j = 0; j < cnt; j++) { - int nalu_len = bytestream2_get_be16(&gb); + const int nalu_len = bytestream2_get_be16(&gb); - if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > - SIZE_MAX - new_extradata_size) { + if (!nalu_len || + nalu_len > bytestream2_get_bytes_left(&gb) || + 4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX - new_extradata_size) { ret = AVERROR_INVALIDDATA; goto fail; }