From 53f11a47a350d4361fb376c247d4b475c7ef4a83 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 26 Sep 2015 13:20:59 +0200 Subject: [PATCH] avcodec/ffv1dec: Fix off by 1 error in quant_table_count check Fixes: invalid_read.nut Found-by: Paul B Mahol Signed-off-by: Michael Niedermayer (cherry picked from commit 2d221d9e069e6269cb41f3678f2734800171d87b) Signed-off-by: Michael Niedermayer --- libavcodec/ffv1dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c index 61915057df..694b63c7b9 100644 --- a/libavcodec/ffv1dec.c +++ b/libavcodec/ffv1dec.c @@ -306,7 +306,7 @@ static int decode_slice_header(FFV1Context *f, FFV1Context *fs) for (i = 0; i < f->plane_count; i++) { PlaneContext * const p = &fs->plane[i]; int idx = get_symbol(c, state, 0); - if (idx > (unsigned)f->quant_table_count) { + if (idx >= (unsigned)f->quant_table_count) { av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n"); return -1; }