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Fix an extremely rare crash that can occur when compressing a very high-frequency MCU using quality 100 and no subsampling, and when dynamically allocating the JPEG buffer in the destination manager. Even with a test program designed specifically to reproduce the crash, it only occurred once in about 25 million iterations. More details here: https://sourceforge.net/p/libjpeg-turbo/bugs/64

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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1364 632fc199-4ca6-4c93-a231-07263d6284db
This commit is contained in:
DRC
2014-08-21 01:53:47 +00:00
parent f6d7b7768b 29823fa9a6
commit 9c168ad23b
1 changed files with 3 additions and 3 deletions
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6
jchuff.c
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@@ -4,7 +4,7 @@
* This file was part of the Independent JPEG Group's software:
* Copyright (C) 1991-1997, Thomas G. Lane.
* libjpeg-turbo Modifications:
* Copyright (C) 2009-2011, D. R. Commander.
* Copyright (C) 2009-2011, 2014 D. R. Commander.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains Huffman entropy encoding routines.
@@ -443,7 +443,7 @@ dump_buffer (working_state * state)
LOCAL(boolean)
flush_bits (working_state * state)
{
JOCTET _buffer[BUFSIZE], *buffer;
JOCTET _buffer[BUFSIZE + 8], *buffer;
size_t put_buffer; int put_bits;
size_t bytes, bytestocopy; int localbuf = 0;
@@ -472,7 +472,7 @@ encode_one_block (working_state * state, JCOEFPTR block, int last_dc_val,
int temp, temp2, temp3;
int nbits;
int r, code, size;
JOCTET _buffer[BUFSIZE], *buffer;
JOCTET _buffer[BUFSIZE + 8], *buffer;
size_t put_buffer; int put_bits;
int code_0xf0 = actbl->ehufco[0xf0], size_0xf0 = actbl->ehufsi[0xf0];
size_t bytes, bytestocopy; int localbuf = 0;