From: Michael Niedermayer <michael@niedermayer.cc>
Date: Tue, 20 Oct 2020 15:18:11 +0000 (+0200)
Subject: avcodec/notchlc: Revert incorrect compression bound
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=6707152f08bbb413329f4460ed604ad58583d972;p=ffmpeg

avcodec/notchlc: Revert incorrect compression bound

Revert "avcodec/notchlc: Check uncompressed size against input for LZ4"

Found-by: durandal_1707
This reverts commit 51002362c4ed301e54cea1597666cd5cc9a134f3.
---

diff --git a/libavcodec/notchlc.c b/libavcodec/notchlc.c
index d13ce3193c9..3f7079da705 100644
--- a/libavcodec/notchlc.c
+++ b/libavcodec/notchlc.c
@@ -490,11 +490,6 @@ static int decode_frame(AVCodecContext *avctx,
 
         bytestream2_init(gb, s->lzf_buffer, uncompressed_size);
     } else if (s->format == 1) {
-        unsigned remaining = bytestream2_get_bytes_left(gb);
-
-        if (remaining > 0x7E000000U || remaining + remaining/255 + 16 < uncompressed_size)
-            return AVERROR_INVALIDDATA;
-
         av_fast_padded_malloc(&s->uncompressed_buffer, &s->uncompressed_size,
                               uncompressed_size);
         if (!s->uncompressed_buffer)