[FFmpeg-cvslog] avcodec/pngdec: Check last AVFrame before deref
ffmpeg | branch: release/5.1 | Michael Niedermayer |
Fri Apr 26 23:22:53 2024 +0200| [dc9d2eb69d553e3bb144f2253def6b8e6ad4ff7d] |
committer: Michael Niedermayer
avcodec/pngdec: Check last AVFrame before deref
Fixes: NULL pointer dereference
Fixes:
68184/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APNG_fuzzer-4926478069334016
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer
(cherry picked from commit 091fdce87e88c8622d8af89ffa6cbb0dc20c3816)
Signed-off-by: Michael Niedermayer
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dc9d2eb69d553e3bb144f2253def6b8e6ad4ff7d
---
libavcodec/pngdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index b085154fbc..0da2ae8b6b 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -1027,7 +1027,7 @@ static int decode_fctl_chunk(AVCodecContext *avctx,
PNGDecContext *s,
return AVERROR_INVALIDDATA;
}
-if ((sequence_number == 0 || !s->last_picture.f->data[0]) &&
+if ((sequence_number == 0 || !s->last_picture.f) &&
dispose_op == APNG_DISPOSE_OP_PREVIOUS) {
// No previous frame to revert to for the first frame
// Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND
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[FFmpeg-cvslog] avcodec/pngdec: Check last AVFrame before deref
ffmpeg | branch: release/6.1 | Michael Niedermayer |
Fri Apr 26 23:22:53 2024 +0200| [554787a53e95f09f49efdfeb2a3f56582852699e] |
committer: Michael Niedermayer
avcodec/pngdec: Check last AVFrame before deref
Fixes: NULL pointer dereference
Fixes:
68184/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APNG_fuzzer-4926478069334016
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer
(cherry picked from commit 091fdce87e88c8622d8af89ffa6cbb0dc20c3816)
Signed-off-by: Michael Niedermayer
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=554787a53e95f09f49efdfeb2a3f56582852699e
---
libavcodec/pngdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index d812ffd348..657d0a9f4e 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -1158,7 +1158,7 @@ static int decode_fctl_chunk(AVCodecContext *avctx,
PNGDecContext *s,
return AVERROR_INVALIDDATA;
}
-if ((sequence_number == 0 || !s->last_picture.f->data[0]) &&
+if ((sequence_number == 0 || !s->last_picture.f) &&
dispose_op == APNG_DISPOSE_OP_PREVIOUS) {
// No previous frame to revert to for the first frame
// Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND
___
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[FFmpeg-cvslog] avcodec/pngdec: Check last AVFrame before deref
ffmpeg | branch: release/7.0 | Michael Niedermayer |
Fri Apr 26 23:22:53 2024 +0200| [a0577e9877ef83c703a003fe76c82aeea761c2d6] |
committer: Michael Niedermayer
avcodec/pngdec: Check last AVFrame before deref
Fixes: NULL pointer dereference
Fixes:
68184/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APNG_fuzzer-4926478069334016
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer
(cherry picked from commit 091fdce87e88c8622d8af89ffa6cbb0dc20c3816)
Signed-off-by: Michael Niedermayer
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a0577e9877ef83c703a003fe76c82aeea761c2d6
---
libavcodec/pngdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index de50e6a5b6..90c286eb83 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -1216,7 +1216,7 @@ static int decode_fctl_chunk(AVCodecContext *avctx,
PNGDecContext *s,
return AVERROR_INVALIDDATA;
}
-if ((sequence_number == 0 || !s->last_picture.f->data[0]) &&
+if ((sequence_number == 0 || !s->last_picture.f) &&
dispose_op == APNG_DISPOSE_OP_PREVIOUS) {
// No previous frame to revert to for the first frame
// Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND
___
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[FFmpeg-cvslog] avcodec/pngdec: Check last AVFrame before deref
ffmpeg | branch: master | Michael Niedermayer | Fri
Apr 26 23:22:53 2024 +0200| [091fdce87e88c8622d8af89ffa6cbb0dc20c3816] |
committer: Michael Niedermayer
avcodec/pngdec: Check last AVFrame before deref
Fixes: NULL pointer dereference
Fixes:
68184/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APNG_fuzzer-4926478069334016
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=091fdce87e88c8622d8af89ffa6cbb0dc20c3816
---
libavcodec/pngdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index f7751223b8..8934a95a7f 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -1218,7 +1218,7 @@ static int decode_fctl_chunk(AVCodecContext *avctx,
PNGDecContext *s,
return AVERROR_INVALIDDATA;
}
-if ((sequence_number == 0 || !s->last_picture.f->data[0]) &&
+if ((sequence_number == 0 || !s->last_picture.f) &&
dispose_op == APNG_DISPOSE_OP_PREVIOUS) {
// No previous frame to revert to for the first frame
// Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND
___
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https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
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