Bug#550625: marked as done (libc6: Realloc sometimes fails to copy all memory correctly)
Your message dated Mon, 19 Oct 2009 01:58:03 +0000
with message-id <E1MzhVb-0007ue-Kb@ries.debian.org>
and subject line Bug#550625: fixed in glibc 2.7-18lenny1
has caused the Debian Bug report #550625,
regarding libc6: Realloc sometimes fails to copy all memory correctly
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)
--
550625: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550625
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: libc6
Version: 2.7-18
Severity: normal
I've been trying to track down a bug that became apparent when using Tor. Sometimes,
realloc apparently failed to copy the last few bytes of a buffer over when it enlarged
said buffer.
I've done some digging, and came across a bugreport about the issue:
http://sources.redhat.com/bugzilla/show_bug.cgi?id=10018
Also, I found a glibc bugreport with an attached patch to
fix the problem, but the patch was rejected by the glibc maintainer:
http://sources.redhat.com/bugzilla/show_bug.cgi?id=5743
a few months later though, the fix was applied:
http://repo.or.cz/w/glibc.git?a=commitdiff;h=486bdb886330a250af76cbb12af55d2c67ec0981
I checked Lenny's sources, and the offending line in malloc.c is the same as in
the bugreports above, Squeeze, due to updating to a newer version of libc,
doesn't have it.
I'm not sure why the test programs referenced don't trigger the bug on Lenny
for me, but when patching the Tor source to manually compare the last few bytes
of a buffer before it is realloc'ed to afterwards exhibits the issue.
-- System Information:
Debian Release: 5.0.3
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.26-1-686-bigmem (SMP w/2 CPU cores)
Locale: LANG=en_US.ISO-8859-15, LC_CTYPE=en_US.ISO-8859-15 (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/bash
Versions of packages libc6 depends on:
ii libgcc1 1:4.3.2-1.1 GCC support library
libc6 recommends no packages.
Versions of packages libc6 suggests:
pn glibc-doc <none> (no description available)
ii libc6-i686 2.7-18 GNU C Library: Shared libraries [i
ii locales 2.7-18 GNU C Library: National Language (
-- debconf information excluded
--- End Message ---
--- Begin Message ---
Source: glibc
Source-Version: 2.7-18lenny1
We believe that the bug you reported is fixed in the latest version of
glibc, which is due to be installed in the Debian FTP archive:
glibc-doc_2.7-18lenny1_all.deb
to pool/main/g/glibc/glibc-doc_2.7-18lenny1_all.deb
glibc-source_2.7-18lenny1_all.deb
to pool/main/g/glibc/glibc-source_2.7-18lenny1_all.deb
glibc_2.7-18lenny1.diff.gz
to pool/main/g/glibc/glibc_2.7-18lenny1.diff.gz
glibc_2.7-18lenny1.dsc
to pool/main/g/glibc/glibc_2.7-18lenny1.dsc
libc6-dbg_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/libc6-dbg_2.7-18lenny1_amd64.deb
libc6-dev-i386_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/libc6-dev-i386_2.7-18lenny1_amd64.deb
libc6-dev_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/libc6-dev_2.7-18lenny1_amd64.deb
libc6-i386_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/libc6-i386_2.7-18lenny1_amd64.deb
libc6-pic_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/libc6-pic_2.7-18lenny1_amd64.deb
libc6-prof_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/libc6-prof_2.7-18lenny1_amd64.deb
libc6-udeb_2.7-18lenny1_amd64.udeb
to pool/main/g/glibc/libc6-udeb_2.7-18lenny1_amd64.udeb
libc6_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/libc6_2.7-18lenny1_amd64.deb
libnss-dns-udeb_2.7-18lenny1_amd64.udeb
to pool/main/g/glibc/libnss-dns-udeb_2.7-18lenny1_amd64.udeb
libnss-files-udeb_2.7-18lenny1_amd64.udeb
to pool/main/g/glibc/libnss-files-udeb_2.7-18lenny1_amd64.udeb
locales-all_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/locales-all_2.7-18lenny1_amd64.deb
locales_2.7-18lenny1_all.deb
to pool/main/g/glibc/locales_2.7-18lenny1_all.deb
nscd_2.7-18lenny1_amd64.deb
to pool/main/g/glibc/nscd_2.7-18lenny1_amd64.deb
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 550625@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Aurelien Jarno <aurel32@debian.org> (supplier of updated glibc package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.8
Date: Sun, 18 Oct 2009 16:58:40 +0200
Source: glibc
Binary: glibc-doc glibc-source locales locales-all nscd libc6 libc6-dev libc6-dbg libc6-prof libc6-pic libc6-udeb libc6.1 libc6.1-dev libc6.1-dbg libc6.1-prof libc6.1-pic libc6.1-udeb libc0.3 libc0.3-dev libc0.3-dbg libc0.3-prof libc0.3-pic libc0.3-udeb libc0.1 libc0.1-dev libc0.1-dbg libc0.1-prof libc0.1-pic libc0.1-udeb libc6-i386 libc6-dev-i386 libc6-sparc64 libc6-dev-sparc64 libc6-s390x libc6-dev-s390x libc6-amd64 libc6-dev-amd64 libc6-powerpc libc6-dev-powerpc libc6-ppc64 libc6-dev-ppc64 libc6-mipsn32 libc6-dev-mipsn32 libc6-mips64 libc6-dev-mips64 libc0.1-i386 libc0.1-dev-i386 libc6-sparcv9b libc6-i686 libc6-xen libc0.1-i686 libc6.1-alphaev67 libnss-dns-udeb libnss-files-udeb
Architecture: source all amd64
Version: 2.7-18lenny1
Distribution: stable
Urgency: low
Maintainer: Aurelien Jarno <aurel32@debian.org>
Changed-By: Aurelien Jarno <aurel32@debian.org>
Description:
glibc-doc - GNU C Library: Documentation
glibc-source - GNU C Library: sources
libc0.1 - GNU C Library: Shared libraries
libc0.1-dbg - GNU C Library: Libraries with debugging symbols
libc0.1-dev - GNU C Library: Development Libraries and Header Files
libc0.1-dev-i386 - GNU C Library: 32bit development libraries for AMD64
libc0.1-i386 - GNU C Library: 32bit shared libraries for AMD64
libc0.1-i686 - GNU C Library: Shared libraries [i686 optimized]
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libc0.3 - GNU C Library: Shared libraries
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libc0.3-pic - GNU C Library: PIC archive library
libc0.3-prof - GNU C Library: Profiling Libraries
libc0.3-udeb - GNU C Library: Shared libraries - udeb (udeb)
libc6 - GNU C Library: Shared libraries
libc6-amd64 - GNU C Library: 64bit Shared libraries for AMD64
libc6-dbg - GNU C Library: Libraries with debugging symbols
libc6-dev - GNU C Library: Development Libraries and Header Files
libc6-dev-amd64 - GNU C Library: 64bit Development Libraries for AMD64
libc6-dev-i386 - GNU C Library: 32bit development libraries for AMD64
libc6-dev-mips64 - GNU C Library: 64bit Development Libraries for MIPS64
libc6-dev-mipsn32 - GNU C Library: n32 Development Libraries for MIPS64
libc6-dev-powerpc - GNU C Library: 32bit powerpc development libraries for ppc64
libc6-dev-ppc64 - GNU C Library: 64bit Development Libraries for PowerPC64
libc6-dev-s390x - GNU C Library: 64bit Development Libraries for IBM zSeries
libc6-dev-sparc64 - GNU C Library: 64bit Development Libraries for UltraSPARC
libc6-i386 - GNU C Library: 32bit shared libraries for AMD64
libc6-i686 - GNU C Library: Shared libraries [i686 optimized]
libc6-mips64 - GNU C Library: 64bit Shared libraries for MIPS64
libc6-mipsn32 - GNU C Library: n32 Shared libraries for MIPS64
libc6-pic - GNU C Library: PIC archive library
libc6-powerpc - GNU C Library: 32bit powerpc shared libraries for ppc64
libc6-ppc64 - GNU C Library: 64bit Shared libraries for PowerPC64
libc6-prof - GNU C Library: Profiling Libraries
libc6-s390x - GNU C Library: 64bit Shared libraries for IBM zSeries
libc6-sparc64 - GNU C Library: 64bit Shared libraries for UltraSPARC
libc6-sparcv9b - GNU C Library: Shared libraries [v9b optimized]
libc6-udeb - GNU C Library: Shared libraries - udeb (udeb)
libc6-xen - GNU C Library: Shared libraries [Xen version]
libc6.1 - GNU C Library: Shared libraries
libc6.1-alphaev67 - GNU C Library: Shared libraries (EV67 optimized)
libc6.1-dbg - GNU C Library: Libraries with debugging symbols
libc6.1-dev - GNU C Library: Development Libraries and Header Files
libc6.1-pic - GNU C Library: PIC archive library
libc6.1-prof - GNU C Library: Profiling Libraries
libc6.1-udeb - GNU C Library: Shared libraries - udeb (udeb)
libnss-dns-udeb - GNU C Library: NSS helper for DNS - udeb (udeb)
libnss-files-udeb - GNU C Library: NSS helper for files - udeb (udeb)
locales - GNU C Library: National Language (locale) data [support]
locales-all - GNU C Library: Precompiled locale data
nscd - GNU C Library: Name Service Cache Daemon
Closes: 550625
Changes:
glibc (2.7-18lenny1) stable; urgency=low
.
* patches/any/cvs-realloc.diff: fix bug in realloc() when enlarging a
memory allocation. Closes: bug#550625.
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