qemu: uncaught target signal 11 (Segmentation fault) - core dumped

[pranjaldoshi96]

This is follow-up of issue #1169
For repro steps follow #1169
Using latest image as mentioned in https://docs.docker.com/buildx/working-with-buildx/ didn't solve the issue.

docker run --privileged --rm tonistiigi/binfmt --install all

When trying to build arm64 image I am getting following Error

#7 96.84 Setting up libgd3:arm64 (2.3.0-2) ...
#7 96.85 Setting up python3-pip (20.3.4-4+deb11u1) ...
#7 99.72 Setting up python3.9-dev (3.9.2-1) ...
#7 99.73 Setting up libc-devtools (2.31-13+deb11u3) ...
#7 99.73 Setting up libpython3-dev:arm64 (3.9.2-3) ...
#7 99.74 Setting up python3-dev (3.9.2-3) ...
#7 99.75 Processing triggers for libc-bin (2.31-13+deb11u3) ...
#7 99.79 qemu: uncaught target signal 11 (Segmentation fault) - core dumped
#7 99.87 Segmentation fault (core dumped)
#7 99.88 qemu: uncaught target signal 11 (Segmentation fault) - core dumped
#7 99.97 Segmentation fault (core dumped)
#7 99.97 dpkg: error processing package libc-bin (--configure):
#7 99.97  installed libc-bin package post-installation script subprocess returned error exit status 139
#7 99.99 Errors were encountered while processing:
#7 99.99  libc-bin
#7 100.1 E: Sub-process /usr/bin/dpkg returned an error code (1)
------
dm_test.Dockerfile:9
--------------------
   7 |     # Install packages
   8 |     RUN apt update
   9 | >>> RUN apt-get install -y python3-pip
  10 |     #Python requirements
  11 |
--------------------
error: failed to solve: process "/bin/sh -c apt-get install -y python3-pip" did not complete successfully: exit code: 100

[pranjaldoshi96]

Closing this as I found the solution. It was not documented so I hope it can be documented.

The issue was with my qemu version. qemu version 7+ are know to be working fine. Oldler version might have some issues while building arm image on and machines.

Steps to install qemu

1. Install required dependency

   sudo apt update && apt upgrade -y
   sudo apt install make -y
   sudo apt install ninja-build -y
   sudo apt-get install libpixman-1-dev
   

2. Download and install qemu 7.0 on machine

   wget https://download.qemu.org/qemu-7.0.0.tar.xz
   tar xvJf qemu-7.0.0.tar.xz
   cd qemu-7.0.0
   ./configure
   make
   

3. Run binfmt container

   docker run --privileged --rm tonistiigi/binfmt --install all
   

   Check if F is present in flags in output of

   $ cat /proc/sys/fs/binfmt_misc/qemu-aarch64
   enabled
   interpreter /usr/bin/qemu-aarch64-static
   flags: OC
   offset 0
   magic 7f454c460201010000000000000000000200b700
   mask ffffffffffffff00fffffffffffffffffeffffff
   

   If flags in not set to OCF run

   docker run --rm --privileged multiarch/qemu-user-static --reset -p yes -c yes
   

4. After this setup run docker buildx as you usually do.

[Sonorpearl]

Thank you. :-)

[zlshi]

Thank you. :-)

[crazy-max]

If someone is willing to make some tests with tonistiigi/binfmt#93 (comment), that would be nice. Thanks.

[pranjaldoshi96]

@crazy-max Would love to add test. Can you give brief me on how to go about it.

[chrisguida]

I had this problem too, and OCF was displayed. However, I still had the segfault until I ran the final command, docker run --rm --privileged multiarch/qemu-user-static --reset -p yes -c yes. Then after that the segfault went away.

[Jubei-VA]

Hey, all.
This isn't related directly to buildx, but I'm just letting you know incase you run into the same issue in the future.

I get libc-bin segfaults running ldconfig with symptoms that look very similar.
Happens in docker and natively when my target is chrooting an aarch64 target and attempting to install packages with apt.
It even occurs the latest Qemu(9.0) is built from source.

But I only get this issue when the host is Ubuntu 24.04. This is strange since the docker container that does the actual chroot is running Ubuntu 18.04, 20.04 etc.

However, when the host OS is Ubuntu 20.04 on the same docker container, there are no segfaults.

[Kamatcho13]

It's says no superuser binary detected !

[NicolasDorier]

Praise to the mighty @pranjaldoshi96 for sharing with us!

docker run --rm --privileged multiarch/qemu-user-static --reset -p yes -c yes fixed it for me