[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2020-02-27 Thread bob var
This fixed my problem. I am reinstalling VirtualBox 6.1.4 and the
command "sudo ln -fs gcc-8 /usr/bin/gcc" solve the problem.

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2020-01-19 Thread Daniel van Vugt
** Also affects: nvidia-graphics-drivers-390 (Ubuntu)
   Importance: Undecided
   Status: New

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2020-01-19 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nvidia-graphics-drivers-390 (Ubuntu Eoan)
   Status: New => Confirmed

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2020-01-19 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nvidia-graphics-drivers-390 (Ubuntu)
   Status: New => Confirmed

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-12-02 Thread Launchpad Bug Tracker
This bug was fixed in the package backport-iwlwifi-dkms -
7906-0ubuntu2~19.10.1

---
backport-iwlwifi-dkms (7906-0ubuntu2~19.10.1) eoan; urgency=low

  * 
debian/patches/0006-NOUPSTREAM-backport-rename-ktime_get_boot_ns-for-v5..patch
- fix build against v5.3. (LP: #1848922)
  * 
debian/patches/0005-Makefile.kernel-pass-fno-stack-clash-protection-and-.patch
- add -fcf-protection=none when using retpoline flags. (LP: #1830961)
- drop -fno-stack-clash-protection for it's no longer necessary.

 -- You-Sheng Yang   Mon, 21 Oct 2019
20:22:27 +0800

** Changed in: backport-iwlwifi-dkms (Ubuntu Eoan)
   Status: Fix Committed => Fix Released

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-11-24 Thread You-Sheng Yang
Verified version 7906-0ubuntu2~19.10.1 against following kernel headers:

  $ dkms status
  backport-iwlwifi, 7906, 4.15.0-1059-oem, x86_64: installed
  backport-iwlwifi, 7906, 5.0.0-1025-oem-osp1, x86_64: installed
  backport-iwlwifi, 7906, 5.3.0-23-generic, x86_64: installed

** Tags removed: verification-needed verification-needed-eoan
** Tags added: verification-done-eoan

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-11-22 Thread Timo Aaltonen
Hello satmandu, or anyone else affected,

Accepted backport-iwlwifi-dkms into eoan-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/backport-iwlwifi-dkms/7906-0ubuntu2~19.10.1 in a few hours, and then in
the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-eoan to verification-done-eoan. If it does not fix
the bug for you, please add a comment stating that, and change the tag
to verification-failed-eoan. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: backport-iwlwifi-dkms (Ubuntu Eoan)
   Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-eoan

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-11-21 Thread You-Sheng Yang
Copied SRU justification from bug 1848922.

** Description changed:

+ [SRU Justification for backport-iwlwifi-dkms]
+ 
+ [Impact]
+ FTBFS against v5.3 kernels on Eoan/Focal.
+ 
+ [Fix]
+ * Backport fix from upstream commit f47729b94e11 (backport: rename 
ktime_get_boot_ns for v5.3+).
+ * Also updates -fcf-protection=none usage for bug 
+ 1830961.
+ 
+ [Test Case]
+ Verified DKMS module build on linux-oem/linux-oem-osp1/linux-generic >= 4.10 
kernels on series Xenial/Bionic/Cosmic/Disco/Eoan and Focal.
+ 
+ [Regression Risk]
+ Low. There is no functional changes in comparison to 7906-0ubuntu1.
+ 
+  original bug description 
+ 
  Compiling kernels & kernel modules fails due to these errors:
  
  ./include/linux/compiler.h:193:1: error: ‘-mindirect-branch’ and ‘-fcf-
  protection’ are not compatible
  
  (This happens with any kernel modules.)
  
  This appears to be due to the changes in 9.1.0-3ubuntu1 enabling -fcf-
  protection by default on 19.10's gcc-9.
  
  Switching to gcc-8 allows compilation to proceed.
  
  WORKAROUND:
  
  sudo ln -fs gcc-8 /usr/bin/gcc

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-11-21 Thread You-Sheng Yang
** Changed in: backport-iwlwifi-dkms (Ubuntu Eoan)
   Status: New => In Progress

** Changed in: backport-iwlwifi-dkms (Ubuntu Eoan)
 Assignee: (unassigned) => You-Sheng Yang (vicamo)

** Changed in: backport-iwlwifi-dkms (Ubuntu Eoan)
   Importance: Undecided => Critical

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-11-21 Thread Łukasz Zemczak
This bug is linked in the backport-iwlwifi-dkms SRU for eoan but it does
not provide the required SRU information (Impact, Test Case, Regression
Potential [1]). Could you please update the bug description? Thank you!

[1] https://wiki.ubuntu.com/StableReleaseUpdates#SRU_Bug_Template

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-11-03 Thread Timo Aaltonen
** Also affects: backport-iwlwifi-dkms (Ubuntu)
   Importance: Undecided
   Status: New

** Also affects: virtualbox (Ubuntu Eoan)
   Importance: Undecided
   Status: New

** Also affects: linux (Ubuntu Eoan)
   Importance: Undecided
   Status: New

** Also affects: xtables-addons (Ubuntu Eoan)
   Importance: Undecided
   Status: New

** Also affects: gcc-9 (Ubuntu Eoan)
   Importance: Undecided
   Status: New

** Also affects: nvidia-graphics-drivers-430 (Ubuntu Eoan)
   Importance: Undecided
   Status: New

** Also affects: backport-iwlwifi-dkms (Ubuntu Eoan)
   Importance: Undecided
   Status: New

** Changed in: backport-iwlwifi-dkms (Ubuntu)
   Status: New => Fix Released

** Changed in: gcc-9 (Ubuntu Eoan)
   Status: New => Won't Fix

** Changed in: linux (Ubuntu Eoan)
   Status: New => Fix Released

** Changed in: nvidia-graphics-drivers-430 (Ubuntu Eoan)
   Status: New => Fix Released

** Changed in: virtualbox (Ubuntu Eoan)
   Status: New => Won't Fix

** Changed in: xtables-addons (Ubuntu Eoan)
   Status: New => Won't Fix

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-10-07 Thread Rik Mills
Redditer trying an upgrade from disco -> eoan reported broken upgrade
due to this, and like in comment #34 I can reproduce this still.

So I think this a fix backported to 19,04 kernel is definitely required
before we release 19.10.

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-09-12 Thread Seth Forshee
Hmm, I guess we should SRU the --fcf-protection=none change to the 19.04
and 18.04 kernels in that case. I will get this done.

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-09-12 Thread Christoph Reiter
Just for the record, this still breaks upgrades from 19.04 (I updated
today) because dkms tries to build things (nvidia and virtualbox here)
for the 19.04 kernel and fails.

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-22 Thread Daniel van Vugt
I think if you need to build any older kernels then the simplest answer
is the workaround in comment #8.

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-22 Thread semreh
It is nice to see this resolved for 5.3-rc1.

Excuse my ignorance of the process, but will this patch be (perhaps
automagically) backported so the next iteration of the 5.2 (and maybe
5.1) stable kernels for amd64 and i386 also get generated successfully?

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-22 Thread satmandu
Thanks all!

Mainline builds of daily and 5.3-rc1 appear to have been generated for
amd64 last night.

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-21 Thread Daniel van Vugt
** Changed in: gcc-9 (Ubuntu)
   Status: Invalid => Won't Fix

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-20 Thread Doug Smythies
Several posters are asking for the mainline builds to be fixed. The
mainline builds are an exact reflection of the upstream git master
repositories. Therefore they have to wait for Seth's patch submission,
which has been picked up and accepted by the kbuild team, to propagate
it's way to the mainline upstream git branch. Earlier today, a kernel
5.3-rc1 merge request was issued by the kbuild team [1]. Once that
branch has been "pulled" into the upstream mainline, the Ubuntu mainline
daily compiles should start working the next day. In about 8 days there
will be kernel 5.3-rc1, which should have the patch.

[1] https://www.spinics.net/lists/linux-kbuild/msg22526.html

Other references:

https://kernel.ubuntu.com/~kernel-ppa/mainline/daily/
https://www.spinics.net/lists/linux-kbuild/msg22298.html
https://patchwork.kernel.org/patch/11037379/

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-20 Thread oscarbg
+1 for fixing mainline kernel builds.. been broken for almost two weeks!

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-20 Thread oscarbg
maybe Seth Forshee  is the guy to ask

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-16 Thread satmandu
Any chance someone could get the recipes fixed for the mainline builds,
which also need the -fcf-protection=none retpoline flags added since
they're being built using "schroot -c eoan-amd64"?

(I'm not sure who needs to be looped in for that to happen.)

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-15 Thread Daniel van Vugt
If the new kernel works per comment #25 then no specific DKMS packages
need fixing.

** Changed in: xtables-addons (Ubuntu)
   Status: Confirmed => Won't Fix

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-15 Thread Daniel van Vugt
linux (5.2.0-8.9) eoan; urgency=medium

  * linux: 5.2.0-8.9 -proposed tracker (LP: #1835700)

  * Miscellaneous Ubuntu changes
- [Packaging] replace zfs and spl build with zfs 0.8.1-1ubuntu1
- SAUCE: test_bpf: remove expected fail for Ctx heavy transformations test 
on
  s390
- SAUCE: add -fcf-protection=none to retpoline flags
- SAUCE: usbip: ensure strings copied using strncpy are null-terminated
- SAUCE: usbip: add -Wno-address-of-packed-member to EXTRA_CFLAGS
- SAUCE: perf jvmti: ensure strncpy result is null-terminated
- update dkms package versions
- add removed zfs modules to modules.ignore

  [ Upstream Kernel Changes ]

  * Rebase to v5.2

 -- Seth Forshee   Mon, 08 Jul 2019 07:13:41
-0500


** Changed in: linux (Ubuntu)
   Status: Fix Committed => Fix Released

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-14 Thread Daniel van Vugt
** Changed in: linux (Ubuntu)
   Status: Confirmed => Fix Committed

** Changed in: virtualbox (Ubuntu)
   Status: Invalid => Won't Fix

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-13 Thread jean-christophe manciot
I confirm that on Ubuntu Eoan with:
- linux kernel 5.2.0-8.9
- gcc-9 9.1.0-8ubuntu1

I am able to:
- build DPDK 19.05
- install xtables-addons-dkms.

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-13 Thread Gianfranco Costamagna via ubuntu-bugs
This is fixed in the -proposed kernel, so I don't plan to hack
virtualbox sources to drop such flag.

** Changed in: virtualbox (Ubuntu)
   Status: Confirmed => Invalid

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-12 Thread Maarten Fonville
Can the patch that was applied to the kernel in
https://launchpad.net/ubuntu/+source/linux/5.2.0-8.9 please also be
applied to the daily mainline builds? (possible duplicate bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1836373 )

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-11 Thread Rocko
The patch that satmandu mentioned in
https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1830961/comments/16
fixes the v5.2.0 mainline kernel build as well.

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-11 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: xtables-addons (Ubuntu)
   Status: New => Confirmed

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-10 Thread Daniel van Vugt
Assigned to Seth per comment #16.

** Changed in: linux (Ubuntu)
 Assignee: (unassigned) => Seth Forshee (sforshee)

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-10 Thread Launchpad Bug Tracker
This bug was fixed in the package nvidia-graphics-drivers-430 -
430.34-0ubuntu2

---
nvidia-graphics-drivers-430 (430.34-0ubuntu2) eoan; urgency=medium

  * 
debian/dkms_nvidia/patches/disable_fstack-clash-protection_fcf-protection.patch:
- Refresh for 430.34 (LP: #1830961).

 -- Alberto Milone   Wed, 10 Jul 2019
15:27:36 +0200

** Changed in: nvidia-graphics-drivers-430 (Ubuntu)
   Status: Fix Committed => Fix Released

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-10 Thread actionmystique
As a follow-up tp my previous comment #12 
(https://bugs.launchpad.net/ubuntu/+source/xtables-addons/+bug/1830961/comments/12),
 I have discovered 2 new facts:
- I am not able to build dpdk 19.05 on the same system anymore, (cf. build 
log), unless I modify the gcc symlink to point to gcc-8 instead of gcc-9
- however, the xtables -addons issue encountered on the previous system has not 
been seen on 2 other Ubuntu Eoan platforms with the exact same versions of:
  + gcc-9 (and/usr/bin/gcc -> gcc-9)
  + linux kernels
  + xtables-addons-dkms/common

** Attachment added: "DPDK 19.05 build log"
   
https://bugs.launchpad.net/ubuntu/+source/xtables-addons/+bug/1830961/+attachment/5276174/+files/dpdk_19.05_amd64.build

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-10 Thread Doug Smythies
If I make the same changes to the Makefile as per the link in comment
#16, then the kernel compiles fine and without the zillions of warnings
I mentioned in comment #13. However I can not find this anywhere
"upstream" as the notes seem to indicate.

doug@serv-ee:~/temp-k-git/linux$ git diff
diff --git a/Makefile b/Makefile
index 3e4868a6498b..d8ccc47215be 100644
--- a/Makefile
+++ b/Makefile
@@ -630,8 +630,8 @@ ifdef CONFIG_FUNCTION_TRACER
   CC_FLAGS_FTRACE := -pg
 endif

-RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern 
-mindirect-branch-register
-RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline 
-mindirect-branch-register
+RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern 
-mindirect-branch-register -fcf-protection=none
+RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline 
-mindirect-branch-register -fcf-protection=none
 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call 
cc-option,$(RETPOLINE_CFLAGS_CLANG)))

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  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-10 Thread satmandu
It looks like this is being addressed in recent linux packages.

As per https://launchpad.net/ubuntu/+source/linux/5.2.0-8.9

"SAUCE: add -fcf-protection=none to retpoline flags"

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-10 Thread Matthias Klose
no, the kernel infrastructure should handle that like any other
hardening flags before.


** Changed in: gcc-9 (Ubuntu)
   Status: Confirmed => Invalid

** Changed in: gcc-9 (Ubuntu)
   Importance: Critical => Undecided

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread satmandu
The origin of this bug is the change in the gcc-9 package on 26 May
2019. Shouldn't the fcf-protection change there just be reverted?

As per the changelog:

gcc-9 (9.1.0-3) experimental; urgency=medium

  * Update to SVN 20190526 (r271629) from the gcc-9-branch.
- Fix PR libgomp/90527, PR c++/90532, PR libstdc++/90299,
  PR libstdc++/90454, PR debug/90197, PR pch/90326, PR c++/90484,
  PR tree-optimization/90385, PR c++/90383, PR tree-optimization/90303,
  PR tree-optimization/90316, PR tree-optimization/90316,
  PR libstdc++/90220, PR libstdc++/90557, PR sanitizer/90570,
  PR target/90547 (x86), PR libfortran/90038, PR fortran/90498,
  PR libfortran/90038, PR libfortran/90038, PR fortran/54613,
  PR fortran/54613, PR libstdc++/85965, PR target/90530 (PARISC),
  PR c++/90572.
  * Turn on -fstack-clash-protection and -fcf-protection in Ubuntu 19.10 on
supported architectures.
  * Fix PR bootstrap/87338 on ia64 (James Clarke). Addresses: #927976.
  * Enable LTO builds on 64bit architectures.
  * Update libstdc++ symbols files for gcc-4-compatible builds.
  * Build the nvptx offload compiler on ppc64el.
  * Build the libgomp-hsa plugin.

 -- Matthias Klose   Sun, 26 May 2019 17:59:59 +0200

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Daniel van Vugt
** Also affects: linux (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu)
   Status: New => Confirmed

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Doug Smythies
As per comment #4, i made the same change:

doug@serv-ee:~/temp-k-git/linux$ git diff
diff --git a/Makefile b/Makefile
index 3e4868a6498b..68f0858484a5 100644
--- a/Makefile
+++ b/Makefile
@@ -630,8 +630,8 @@ ifdef CONFIG_FUNCTION_TRACER
   CC_FLAGS_FTRACE := -pg
 endif

-RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern 
-mindirect-branch-register
-RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline 
-mindirect-branch-register
+RETPOLINE_CFLAGS_GCC := -mindirect-branch-register
+RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch-register
 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call 
cc-option,$(RETPOLINE_CFLAGS_CLANG)))

And while the kernel compile had a constant stream of warnings, the
resulting kernel (5.2) works fine.

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Daniel van Vugt
** Changed in: nvidia-graphics-drivers-430 (Ubuntu)
   Status: Confirmed => Fix Committed

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread jean-christophe manciot
Same issue with:

Ubuntu 19.10
xtables-addons-dkms 3.2-1ubuntu2
linux kernel 5.0.0-17 and 5.0.0-20
gcc-9: 9.1.0-6ubuntu2

The compilation complains that:
 echo >&2;  \
 echo >&2 "  ERROR: Kernel configuration is invalid.";  \
 echo >&2 " include/generated/autoconf.h or include/config/auto.conf 
are missing.";\
 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix 
it."; \

but both files are present. Later on, I get a huge number of similar errors 
like the following:
 ./include/linux/compiler.h:192:1: error: ‘-mindirect-branch’ and 
‘-fcf-protection’ are not compatible

Switching to gcc-8 works around this critical issue.

** Attachment added: "/var/crash/xtables-addons-dkms.0.crash"
   
https://bugs.launchpad.net/ubuntu/+source/xtables-addons/+bug/1830961/+attachment/5275942/+files/xtables-addons-dkms.0.crash

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread jean-christophe manciot
** Also affects: xtables-addons (Ubuntu)
   Importance: Undecided
   Status: New

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Alberto Milone
I uploaded a workaround, and it is in eoan-proposed:
https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-430/430.26-0ubuntu3

** Changed in: nvidia-graphics-drivers-430 (Ubuntu)
 Assignee: (unassigned) => Alberto Milone (albertomilone)

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread satmandu
This also appears to be breaking the Ubuntu mainline kernel builds:

https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.2/BUILD.LOG.amd64

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Daniel van Vugt
https://lists.ubuntu.com/archives/ubuntu-devel/2019-June/040741.html

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Daniel van Vugt
WORKAROUND:

sudo ln -fs gcc-8 /usr/bin/gcc

** Description changed:

  Compiling kernels & kernel modules fails due to these errors:
  
  ./include/linux/compiler.h:193:1: error: ‘-mindirect-branch’ and ‘-fcf-
  protection’ are not compatible
- 
  
  (This happens with any kernel modules.)
  
  This appears to be due to the changes in 9.1.0-3ubuntu1 enabling -fcf-
  protection by default on 19.10's gcc-9.
  
  Switching to gcc-8 allows compilation to proceed.
+ 
+ WORKAROUND:
+ 
+ sudo ln -fs gcc-8 /usr/bin/gcc

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nvidia-graphics-drivers-430 (Ubuntu)
   Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1830961

Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Daniel van Vugt
** Tags added: eoan regression

** Changed in: gcc-9 (Ubuntu)
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1830961

Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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[Bug 1830961] Re: Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible]

2019-07-09 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: virtualbox (Ubuntu)
   Status: New => Confirmed

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Title:
  Kernels & kernel drivers fail to build with gcc-9 [error: ‘-mindirect-
  branch’ and ‘-fcf-protection’ are not compatible]

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