ffmpeg | branch: release/3.3 | Michael Niedermayer <mich...@niedermayer.cc> | Mon Aug 21 00:18:48 2017 +0200| [eea01de3ff157180d04782cea9a09072408d723a] | committer: Michael Niedermayer
avcodec/hevc_ps: Check delta_pocs in ff_hevc_decode_short_term_rps() Fixes: integer overflow Fixes: 2893/clusterfuzz-testcase-minimized-5809330567774208 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 2b44dcbc44e99daf9515753e9fd4c2e1ea53a2fa) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=eea01de3ff157180d04782cea9a09072408d723a --- libavcodec/hevc_ps.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index 19e61977b5..f34d9e342f 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -225,6 +225,12 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx, prev = 0; for (i = 0; i < rps->num_negative_pics; i++) { delta_poc = get_ue_golomb_long(gb) + 1; + if (delta_poc < 1 || delta_poc > 32768) { + av_log(avctx, AV_LOG_ERROR, + "Invalid value of delta_poc: %d\n", + delta_poc); + return AVERROR_INVALIDDATA; + } prev -= delta_poc; rps->delta_poc[i] = prev; rps->used[i] = get_bits1(gb); @@ -232,6 +238,12 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx, prev = 0; for (i = 0; i < nb_positive_pics; i++) { delta_poc = get_ue_golomb_long(gb) + 1; + if (delta_poc < 1 || delta_poc > 32768) { + av_log(avctx, AV_LOG_ERROR, + "Invalid value of delta_poc: %d\n", + delta_poc); + return AVERROR_INVALIDDATA; + } prev += delta_poc; rps->delta_poc[rps->num_negative_pics + i] = prev; rps->used[rps->num_negative_pics + i] = get_bits1(gb); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
