From 310d2af319d9113263f75e94f5a1b211c05260b5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 25 Feb 2017 01:43:16 +0100 Subject: [PATCH] avcodec/pngdec: Fix runtime error: left shift of 152 by 24 places cannot be represented in type 'int' Fixes: 666/clusterfuzz-testcase-6581447227867136 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/pngdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index c2ea4d2765..a4eb6cce1b 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -796,7 +796,7 @@ static int decode_trns_chunk(AVCodecContext *avctx, PNGDecContext *s, return AVERROR_INVALIDDATA; for (i = 0; i < length; i++) { - v = bytestream2_get_byte(&s->gb); + unsigned v = bytestream2_get_byte(&s->gb); s->palette[i] = (s->palette[i] & 0x00ffffff) | (v << 24); } } else if (s->color_type == PNG_COLOR_TYPE_GRAY || s->color_type == PNG_COLOR_TYPE_RGB) {