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| author | Michael Niedermayer <michaelni@gmx.at> | 2015-02-07 03:34:48 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-02-13 20:48:08 +0100 |
| commit | 4d5beea7a1820289e211345db06ba185d51772d8 (patch) | |
| tree | 28cc0b3b57efca4be18a9b7f207e6170b737e208 | |
| parent | 2073ab266eef2c01bd750f20d1177db4ca71ea63 (diff) | |
| download | ffmpeg-4d5beea7a1820289e211345db06ba185d51772d8.tar.gz | |
avcodec/h264_slice: ignore SAR changes in slices after the first
Fixes race condition and null pointer dereference
Fixes: signal_sigsegv_1472ac3_468_cov_2915641226_CABACI3_Sony_B.jsv
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 38d5241b7f36c1571a88517a0650caade16dd5f4)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/h264_slice.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c index 113bcc31ec..641ec23af4 100644 --- a/libavcodec/h264_slice.c +++ b/libavcodec/h264_slice.c @@ -1431,13 +1431,15 @@ int ff_h264_decode_slice_header(H264Context *h, H264Context *h0) || 16*h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) != h->avctx->coded_height || h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma || h->cur_chroma_format_idc != h->sps.chroma_format_idc - || av_cmp_q(h->sps.sar, h->avctx->sample_aspect_ratio) || h->mb_width != h->sps.mb_width || h->mb_height != h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag) )); if (non_j_pixfmt(h0->avctx->pix_fmt) != non_j_pixfmt(get_pixel_format(h0, 0))) must_reinit = 1; + if (first_slice && av_cmp_q(h->sps.sar, h->avctx->sample_aspect_ratio)) + must_reinit = 1; + h->mb_width = h->sps.mb_width; h->mb_height = h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag); h->mb_num = h->mb_width * h->mb_height; |