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Groups > linux.debian.kernel > #58125

Bug#865549: linux-image-3.16.0-4-powerpc64le: stackguard fix incorrect; probably causes cargo to segfault on ppc64el

Cross-posted to 2 groups.

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Package: linux-image-3.16.0-4-powerpc64le
Version: 3.16.43-2+deb8u1
Severity: critical
Justification: breaks unrelated software

Dear Maintainer,

I have been getting segfaults trying to build cargo on ppc64el

https://github.com/rust-lang/cargo/issues/4197

The signs point to the recent stack guard fix as being the culprit, I can
confirm that the test program given here:

http://www.openwall.com/lists/oss-security/2017/06/22/6

indicates the presence of the bug on plummer.debian.org. I'm not very familiar
with kernel development so I don't know where the proper fix is, but subsequent
discussion on that thread suggests that mainline has the "correct fix" whereas
some distros applied an incorrect one.

Thanks,
Ximin

-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 'testing-debug'), (300, 'unstable'), (200, 'experimental'), (1, 'experimental-debug')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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Bug#865549: linux-image-3.16.0-4-powerpc64le: stackguard fix incorrect; probably causes cargo to segfault on ppc64el Ximin Luo <infinity0@debian.org> - 2017-06-22 19:10 +0200
  Bug#865549: linux-image-3.16.0-4-powerpc64le: stackguard fix incorrect; probably causes cargo to segfault on ppc64el Ben Hutchings <ben@decadent.org.uk> - 2017-06-22 23:40 +0200
    Bug#865549: linux-image-3.16.0-4-powerpc64le: stackguard fix incorrect; probably causes cargo to segfault on ppc64el Ximin Luo <infinity0@debian.org> - 2017-06-23 02:10 +0200
  Processed: Re: linux-image-3.16.0-4-powerpc64le: stackguard fix  incorrect; probably causes cargo to segfault on ppc64el owner@bugs.debian.org (Debian Bug Tracking System) - 2017-06-22 23:40 +0200
  Processed (with 1 error): Re: linux-image-3.16.0-4-powerpc64le:  stackguard fix incorrect; probably causes cargo to segfault on ppc64el owner@bugs.debian.org (Debian Bug Tracking System) - 2017-06-23 09:20 +0200
  Processed: Re: [Pkg-rust-maintainers] Bug#865549: cargo still  segfaults / rustc still FTBFS with the newest fixed kernel owner@bugs.debian.org (Debian Bug Tracking System) - 2017-07-04 13:40 +0200

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