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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2012-02-10 10:57:01 +0400 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2012-02-10 10:57:01 +0400 |
| commit | 45b7bd7c53b41bc5ff6fc2158831f2b1b1256113 (patch) | |
| tree | 51923d7569c3c823380fcca869fa8361055dcc3e /libavcodec/h264.h | |
| parent | 81749f30cd84b35f774d7d1bbe6bf3f96e2362c8 (diff) | |
h264: disallow constrained intra prediction modes for luma.
Conversion of the luma intra prediction mode to one of the constrained
("alzheimer") ones can happen by crafting special bitstreams, causing
a crash because we'll call a NULL function pointer for 16x16 block intra
prediction, since constrained intra prediction functions are only
implemented for chroma (8x8 blocks).
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Diffstat (limited to 'libavcodec/h264.h')
| -rw-r--r-- | libavcodec/h264.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/h264.h b/libavcodec/h264.h index 50255389fa..8680f5fdbd 100644 --- a/libavcodec/h264.h +++ b/libavcodec/h264.h @@ -657,7 +657,7 @@ int ff_h264_check_intra4x4_pred_mode(H264Context *h); /** * Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks. */ -int ff_h264_check_intra_pred_mode(H264Context *h, int mode); +int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma); void ff_h264_hl_decode_mb(H264Context *h); int ff_h264_frame_start(H264Context *h); |