Your message dated Fri, 11 Nov 2016 03:03:50 +0000
with message-id <[email protected]>
and subject line Bug#843826: fixed in dpkg 1.18.14
has caused the Debian Bug report #843826,
regarding PIE specs file leads to segfaults on sparc64
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.
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--
843826: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=843826
Debian Bug Tracking System
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--- Begin Message ---
Package: dpkg-dev
Version: 1.18.13
Severity: important
User: [email protected]
Usertags: sparc64
X-Debbugs-Cc: [email protected]
Hi Guillem,
Unfortunately, your new specs files lead to segfaults on sparc64:
> $ cat exit.c
> #include <stdlib.h>
>
> int main(int argc, char **argv) {
> exit(1);
> return 2;
> }
> $ gcc -specs=/usr/share/dpkg/pie-compile.specs -c exit.c -o exit.o
> $ gcc -specs=/usr/share/dpkg/pie-link.specs exit.o -o exit
> $ ./exit
> Segmentation fault
This is because, while cc1 is given -fPIE, as is not given anything. For
most architectures, this is actually fine, but on SPARC, as *must* be
given -K PIC. When looking at strace, this is the only difference
between gcc -specs=... and gcc -fPIE for compiling. Otherwise, what
happens is the assembler does not emit a PLT call, instead leaving the
call address as an immediate to be filled in by a 30-bit relocation,
which doesn't fit at runtime (with this particular example, libc was
loaded such that exit was at 0xfff80001001624e0) and gets truncated.
Note that the linker invocation itself is fine; it was just given bad
input (although perhaps this is something it could have caught and given
an error message?).
As far as I can tell, changing the cc1_options to self_spec in
(no-)pie-compile.specs should work fine. It certainly fixes the problem
here, and off the top of my head, I can't think of any issues this would
cause.
James
--- End Message ---
--- Begin Message ---
Source: dpkg
Source-Version: 1.18.14
We believe that the bug you reported is fixed in the latest version of
dpkg, which is due to be installed in the Debian FTP archive.
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 [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Guillem Jover <[email protected]> (supplier of updated dpkg 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 [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Fri, 11 Nov 2016 02:26:08 +0100
Source: dpkg
Binary: dpkg libdpkg-dev dpkg-dev libdpkg-perl dselect
Architecture: source
Version: 1.18.14
Distribution: unstable
Urgency: medium
Maintainer: Dpkg Developers <[email protected]>
Changed-By: Guillem Jover <[email protected]>
Description:
dpkg - Debian package management system
dpkg-dev - Debian package development tools
dselect - Debian package management front-end
libdpkg-dev - Debian package management static library
libdpkg-perl - Dpkg perl modules
Closes: 843791 843826 843829 843874
Changes:
dpkg (1.18.14) unstable; urgency=medium
.
[ Guillem Jover ]
* Improve PIE flags support:
- Rename the spec name cc1_options to self_spec.
Suggested by James Clarke <[email protected]>
- Do not set PIE options if they have been negated, and do not reset
them if they have been requested.
Closes: #843791, #843826
* Fix use after free error in dpkg. It was trying to print messages that
had already been freed as part of the database memory pool, causing in
some cases segfaults when reporting the error summary at the end.
Regression introduced in dpkg 1.18.11. Closes: #843874
* Change default color behavior to auto.
* Perl modules:
- Fix confusing date parse error message in Dpkg::Changelog::Entry::Debian
when the date contains “May”. Closes: #843829
Thanks to Nishanth Aravamudan <[email protected]>.
- New module Dpkg::Build::Info module refactored from dpkg-genbuildinfo.
Requested by Johannes Schauer <[email protected]>.
* Documentation:
- Improve the DEB_BUILD_OPTIONS description in dpkg-buildpackage(1).
And mention the parallel option there.
- Explicitly mention in dpkg-buildpackage(1) that setting the number
of parallel jobs to 1, restores the serial behavior.
Prompted by Thorsten Glaser <[email protected]>.
* Packaging:
- List public Dpkg::Control::Tests module in libdpkg-perl description.
* Test suite:
- Do not fail tests on missing fakeroot, just skip them.
* Build system:
- Fix inversion logic in libmd configure check when requested explicitly.
- Do not consider the compressor libraries available in configure if the
headers are not usable.
- Fix DPKG_BUILD_RELEASE_DATE to require DPKG_PROG_PERL, as it uses perl.
- Change DPKG_BUILD_RELEASE_DATE to use perl instead of date(1) to
format the timestamp, as the former is more portable.
.
[ Updated man pages translations ]
* German (Helge Kreutzmann).
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