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[Bug libc/12140] mallopt(M_PERTURB) free() anomaly
- From: "mtk.manpages at gmail dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Wed, 20 Oct 2010 02:42:52 +0000
- Subject: [Bug libc/12140] mallopt(M_PERTURB) free() anomaly
- Auto-submitted: auto-generated
- References: <bug-12140-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=12140
--- Comment #1 from Michael Kerrisk <mtk.manpages at gmail dot com> 2010-10-20 02:42:48 UTC ---
Created attachment 5071
--> http://sourceware.org/bugzilla/attachment.cgi?id=5071
test program
The following sample run of the attached program demonstrates the problem.
$ ./a.out 8 0x0f # Allocate 8 bytes, M_PERTURB=0x0f
f0 f0 f0 f0 f0 f0 f0 f0 00 00 00 00
7b 7b 7b 7b 7b 7b 7b 7b 00 00 00 00
00 00 00 00 0f 0f 0f 0f 0f 0f 0f 0f
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