https://sourceforge.net/p/libjpeg/bugs/17/2022-09-11T15:43:37.318000ZRecent changes to 17: Bug report of program djpeg2022-09-11T15:43:37.318000Z2022-09-11T15:43:37.318000ZAnonymoushttps://sourceforge.net/u/userid-None/https://sourceforge.net891fded3405f7aaa101e0848f3967bde38480110

<div class="markdown_content"><p>Please could you double check the file you've attached? It looks like a tiff file?</p></div>

2022-08-15T12:36:32.712000Z2022-08-15T12:36:32.712000ZAnonymoushttps://sourceforge.net/u/userid-None/https://sourceforge.net7989b91f1c2376ad83335f5081d7a00764d6c7e9

<div class="markdown_content"><p>Bug Description:<br/> When executing djpeg (newest release version) , the program terminates with Nonfatal Error shown below.</p> <div class="codehilite"><pre><span></span><code>Corrupt JPEG data: 2 extraneous bytes before marker 0xc1 P6 227 9 255 </code></pre></div> <p>Then I apply MSan (Memory Sanitizer ) to check for memory errors and the error report is as follows.</p> <div class="codehilite"><pre><span></span><code>==83120==WARNING: MemorySanitizer: use-of-uninitialized-value #0 0x4bd5e0 in h2v2_merged_upsample /jpeg-9c/jdmerge.c:380:26 #1 0x4bca17 in merged_2v_upsample /jpeg-9c/jdmerge.c:228:5 #2 0x4f0e26 in process_data_simple_main /jpeg-9c/jdmainct.c:366:3 #3 0x4a3b7f in jpeg_read_scanlines /jpeg-9c/jdapistd.c:174:3 #4 0x4947a1 in main /jpeg-9c/djpeg.c:589:21 #5 0x7fba0e279c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86) #6 0x41b599 in _start (/djpeg/djpeg_msan+0x41b599) SUMMARY: MemorySanitizer: use-of-uninitialized-value /jpeg-9c/jdmerge.c:380:26 in h2v2_merged_upsample </code></pre></div> <p>Step to Reproduce<br/> download the libjpeg from github and build it with MSAN<br/> Execute djpeg with given testcases</p></div>