From 5dc94924d0fbdedba4356c21ec7de0347b8e4757 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 13 Jul 2019 20:16:19 +0200 Subject: [PATCH] avcodec/clearvideo: fix invalid shift in tile size check Fixes: left shift of 1 by 31 places cannot be represented in type 'int' Fixes: 15631/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CLEARVIDEO_fuzzer-5690110605000704 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/clearvideo.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/clearvideo.c b/libavcodec/clearvideo.c index 82df8f3752..26cdfb2731 100644 --- a/libavcodec/clearvideo.c +++ b/libavcodec/clearvideo.c @@ -665,7 +665,7 @@ static av_cold int clv_decode_init(AVCodecContext *avctx) } c->tile_shift = av_log2(c->tile_size); - if (1 << c->tile_shift != c->tile_size) { + if (1U << c->tile_shift != c->tile_size) { av_log(avctx, AV_LOG_ERROR, "Tile size: %d, is not power of 2.\n", c->tile_size); return AVERROR_INVALIDDATA; }