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charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: In libavcodec/vvc/ctu.c, the functions set_tb_size and set_cb_pos lack proper boundary checks before performing memset operations. This patch adds validation against PPS dimensions to prevent heap overflows. Signed-off-by: 0xBat --- libavcodec/vvc/ctu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/vvc/ctu.c b/libavcodec/vvc/ctu.c index 18cbe0fe0f..ce8a7ab90e 100644 --- a/libavcodec/vvc/ctu.c +++ b/libavcodec/vvc/ctu.c @@ -52,6 +52,9 @@ static void set_tb_size(const VVCFrameContext *fc, const TransformBlock *tb) for (int y = y_tb; y < end; y++) { const int off = y * fc->ps.pps->min_tu_width + x_tb; + int max_off = fc->ps.pps->min_tu_width * fc->ps.pps->min_tu_height; + if (off + width > max_off) + return; memset(fc->tab.tb_width [is_chroma] + off, tb->tb_width, width); memset(fc->tab.tb_height[is_chroma] + off, tb->tb_height, width); } @@ -1185,6 +1188,8 @@ static void set_cb_pos(const VVCFrameContext *fc, const CodingUnit *cu) fc->tab.cb_pos_x[ch_type][x + i] = cu->x0; fc->tab.cb_pos_y[ch_type][x + i] = cu->y0; } + if (x + width > fc->ps.pps->min_tu_width * fc->ps.pps->min_tu_height) + return; memset(&fc->tab.cb_width[ch_type][x], cu->cb_width, width); memset(&fc->tab.cb_height[ch_type][x], cu->cb_height, width); memset(&fc->tab.cqt_depth[ch_type][x], cu->cqt_depth, width); -- 2.52.0.windows.1 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org