Date: Sun, 9 Oct 2016 11:28:25 +0200 From: Marcus Meissner <meissner@...e.de> To: oss-security@...ts.openwall.com Subject: Re: potrace: memory allocation failure Hi, did you attach the reproducer files somewhere? Ciao, Marcus On Sat, Oct 08, 2016 at 10:30:54PM +0200, Agostino Sarubbo wrote: > Description: > potrace is a utility that transforms bitmaps into vector graphics. > > A crafted image, through a fuzz testing, causes the memory allocation to fail. > > This is the first case where my ASan symbolyzer didn’t start up correctly. I’m > reporting only what it prints at the end (not useful at all but demostrates a > bit that the issue exist) > > # potrace $FILE > potrace: warning: 2.hangs: premature end of file > ==13660==ERROR: AddressSanitizer failed to allocate 0x200003000 (8589946880) > bytes of LargeMmapAllocator (error code: 12) > ==13660==AddressSanitizer CHECK failed: /var/tmp/portage/sys- > devel/llvm-3.8.1/work/llvm-3.8.1.src/projects/compiler- > rt/lib/sanitizer_common/sanitizer_common.cc:183 "((0 && "unable to mmap")) != > (0)" (0x0, 0x0) > > Affected version: > 1.13 > > Fixed version: > N/A > > Commit fix: > N/A > > Credit: > This bug was discovered by Agostino Sarubbo of Gentoo. > > CVE: > N/A > > Timeline: > 2016-08-26: bug discovered > 2016-08-27: bug reported privately to upstream > 2016-08-29: blog post about the issue > > Note: > This bug was found with American Fuzzy Lop. > > Permalink: > https://blogs.gentoo.org/ago/2016/08/29/potrace-memory-allocation-failure/ > > -- Marcus Meissner,SUSE LINUX GmbH; Maxfeldstrasse 5; D-90409 Nuernberg; Zi. 3.1-33,+49-911-740 53-432,,serv=loki,mail=wotan,type=real <meissner@...e.de>
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