From d9051f8f3e60768f68867c3e3116e980d855215a Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 11 May 2017 15:07:28 +0200 Subject: [PATCH] avcodec/mimic: Fix runtime error: index 96 out of bounds for type 'const int8_t [64]' Fixes: 1468/clusterfuzz-testcase-minimized-5235964056174592 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mimic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/mimic.c b/libavcodec/mimic.c index 61ce1ce584..607dffa4a5 100644 --- a/libavcodec/mimic.c +++ b/libavcodec/mimic.c @@ -260,7 +260,7 @@ static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale) /* FFmpeg's IDCT behaves somewhat different from the original code, so * a factor of 4 was added to the input */ - coeff = vlcdec_lookup[num_bits][value]; + coeff = ((int8_t*)vlcdec_lookup[num_bits])[value]; if (pos < 3) coeff *= 16; else /* TODO Use >> 10 instead of / 1001 */