avcodec/h264_cabac: Tighten allowed coeff_abs range

Fixes: integer overflows Reported-by: "Xiaohan Wang (王消寒)" <xhwang@chromium.org> Based on limits in "8.5 Transform coefficient decoding process and picture construction process prior to deblocking filter process" Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
7 years ago · f26a63c4ee
parent fb580731c1
commit f26a63c4ee
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/h264_cabac.c
+++ b/libavcodec/h264_cabac.c
@ -1735,7 +1735,7 @@ decode_cabac_residual_internal(const H264Context *h, H264SliceContext *sl,
 \
            if( coeff_abs >= 15 ) { \
                int j = 0; \
-                while (get_cabac_bypass(CC) && j < 30) { \
+                while (get_cabac_bypass(CC) && j < 16+7) { \
                    j++; \
                } \
 \