> I want to cross-post this over here as well. I'm finding a very
similar issue as the one described. The issue linked claims this is now
fixed but I can still reproduce it 100% of the times.
Thanks for sharing that link. For what it's worth, I tried all the following
versions, which were called
I want to cross-post this over here as well. I'm finding a very similar
issue as the one described. The issue linked claims this is now fixed
but I can still reproduce it 100% of the times.
See:
https://github.com/tonistiigi/binfmt/issues/215#issuecomment-2653281724
Had also a small internal chat
FYI, this could be related and/or also covering this topic
- https://github.com/tonistiigi/binfmt/issues/215#issuecomment-2613004741
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1087822
Thanks Massimilliano for providing that, adding it here as background
might help Matthew when he iterates
Hi Matthew - we tried using your qemu updates, and unfortunately the
test failed (crashed).
A bit more information: our reproducer is running in a GitHub Actions
context. We added your custom qemu package to our base VM image and then
ran our test. (There is an implicit reboot in that process.) Ho
Hi Ben,
I have a test qemu to try. I am still working out the finer details, so I don't
reintroduce bug 1908331 from a few years ago though.
Would you be able to try it out on a test instance? If the instance is still
running the test kernel, remove the test kernel and go back to the released
off
Looking at the test package in regards to bug 1908331, so we don't
reintroduce it.
current -updates:
qemu-user-static_6.2+dfsg-2ubuntu6.24_amd64.deb
ubuntu@jammy-aaa:~$ file /usr/bin/qemu-aarch64-static
/usr/bin/qemu-aarch64-static: ELF 64-bit LSB executable, x86-64, version 1
(GNU/Linux), stat
Debdiff for the test package, for study.
** Patch added: "Test package debdiff for Jammy"
https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/2096782/+attachment/5853993/+files/lp2096782_test.debdiff
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From what I can tell only jammy needs to be fixed.
Focal didn't get any changes from bug 1908331, and has no mention of
--disable-pie.
debian/rules
198 ifeq ($(enable_linux_user),enable)
199 # do not use debian/configure-opts here, all optional stuff will be enabled
200 # automatically, dependenc
Thanks, Matthew. Yeah, my original recommendation to revert the kernel
patch was purely my opinion. If it is preferable to fix qemu instead,
that would be equally as good from my perspective.
Perhaps a dump question, but regarding this comment:
> Changed in qemu (Ubuntu):
status: New → Fix Release
** Also affects: qemu (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: qemu (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: qemu (Ubuntu)
Status: New => Fix Released
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Kernels that contain "x86: Increase brk randomness entropy for 64-bit
systems":
6.9-rc1 and later.
6.8.0-50-generic and onward
5.15.0-125-generic and onward
5.4.0-200-generic and onward
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Hi Ben,
Thanks for trying the test kernel out. Its great to hear that your analysis was
correct, and it was "x86: Increase brk randomness entropy for 64-bit systems"
causing the issues.
I am still deciding what to do.
You see, I came across this mailing list thread:
https://lore.kernel.org/all/
Hi Matthew - we tested your ppa:mruffell/lp2096782-test packages, and
the problem did NOT occur (good!). We also verified that we were running
with your kernel for the test:
uname -rv
6.8.0-1021-aws #23~22.04.1+TEST2096782v20250128b3-Ubuntu SMP Tue Jan 28 05:25:4
Thanks,
Ben
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Thanks for the quick response, Matthew! We're juggling a bunch of
priorities right now, but I'm hopeful we can test this custom kernel out
and get back to you by the end of the week.
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http
Hi Ben,
I made you a test kernel with the following commit reverted:
ubuntu-jammy-aws: f5be153733b4d3dab31e3660b54660f34ff90584
commit 44c76825d6eefee9eb7ce06c38e1a6632ac7eb7d
Author: Kees Cook
Date: Fri Feb 16 22:25:43 2024 -0800
Subject: x86: Increase brk randomness entropy for 64-bit system
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