From 8a4e3bc1c5c62df3434573adfd254cc68c826f7e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 9 Jun 2022 22:21:55 +0200 Subject: avcodec/hevcdsp_template: stay within tables in sao_band_filter() Fixes: out of array read Fixes: 47875/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5719393113341952 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 9c5250a5612d4b32d79108de0c03945b2017963e) Signed-off-by: Michael Niedermayer --- libavcodec/hevcdsp_template.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/hevcdsp_template.c b/libavcodec/hevcdsp_template.c index 56cd9e605d..61425975cd 100644 --- a/libavcodec/hevcdsp_template.c +++ b/libavcodec/hevcdsp_template.c @@ -313,7 +313,7 @@ static void FUNC(sao_band_filter)(uint8_t *_dst, uint8_t *_src, offset_table[(k + sao_left_class) & 31] = sao_offset_val[k + 1]; for (y = 0; y < height; y++) { for (x = 0; x < width; x++) - dst[x] = av_clip_pixel(src[x] + offset_table[src[x] >> shift]); + dst[x] = av_clip_pixel(src[x] + offset_table[(src[x] >> shift) & 31]); dst += stride_dst; src += stride_src; } -- cgit v1.2.1