From 4dd2c8b9ea46b4e008a8bfc2077834428cd5a17c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 27 Apr 2018 20:16:13 +0200 Subject: [PATCH] avcodec/g2meet: Check RGB upper limit Fixes: runtime error: left shift of 1876744317 by 16 places cannot be represented in type 'int' Fixes: 6799/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G2M_fuzzer-5115274731716608 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/g2meet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c index 5edfb31560..2cf708a4f0 100644 --- a/libavcodec/g2meet.c +++ b/libavcodec/g2meet.c @@ -556,7 +556,7 @@ static uint32_t epic_decode_pixel_pred(ePICContext *dc, int x, int y, B = ((pred >> B_shift) & 0xFF) - TOSIGNED(delta); } - if (R<0 || G<0 || B<0) { + if (R<0 || G<0 || B<0 || R > 255 || G > 255 || B > 255) { av_log(NULL, AV_LOG_ERROR, "RGB %d %d %d is out of range\n", R, G, B); return 0; }