ffmpeg | branch: master | Michael Niedermayer <[email protected]> | Fri Oct 23 00:24:01 2020 +0200| [7cf852b03c3ae6b61f89614371d2cb308d0b7f86] | committer: Michael Niedermayer
avcodec/hevc_cabac: Limit value in coeff_abs_level_remaining_decode() tighter The max depth is 16bps, the max allowed coefficient depth is depth+6 Fixes: signed integer overflow: 1074266112 + 1073725439 cannot be represented in type 'int' Fixes: 26493/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5657763331702784 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7cf852b03c3ae6b61f89614371d2cb308d0b7f86 --- libavcodec/hevc_cabac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/hevc_cabac.c b/libavcodec/hevc_cabac.c index 3dc0987dad..3635b16ca9 100644 --- a/libavcodec/hevc_cabac.c +++ b/libavcodec/hevc_cabac.c @@ -998,7 +998,7 @@ static av_always_inline int coeff_abs_level_remaining_decode(HEVCContext *s, int } else { int prefix_minus3 = prefix - 3; - if (prefix == CABAC_MAX_BIN || prefix_minus3 + rc_rice_param >= 31) { + if (prefix == CABAC_MAX_BIN || prefix_minus3 + rc_rice_param > 16 + 6) { av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", prefix); return 0; } _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
