The same issue persists in qemu-5.2.0. ----------------------------------------- # qemu-aarch64 --version qemu-aarch64 version 5.2.0 Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers -----------------------------------------
Symptoms when running inside the aarch64 chroot, with both aarch64 and x86_64 binaries: ----------------------------------------- # which unshare bash /usr/bin/unshare /bin/bash # file $(!!) file $(which unshare bash) /usr/bin/unshare: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, stripped /bin/bash: ELF 64-bit LSB pie executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, stripped # unshare --pid -- bash -c 'echo hello world' qemu: qemu_thread_create: Invalid argument Aborted (core dumped) # # --- switch to an x86_64 shell _inside_ the chroot # LD_LIBRARY_PATH=/x86_64/lib64 PATH=/x86_64/bin:$PATH bash # which unshare bash /x86_64/bin/unshare /x86_64/bin/bash # file $(!!) file $(which unshare bash) /x86_64/bin/unshare: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, stripped /x86_64/bin/bash: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, stripped # unshare --pid -- bash -c 'echo hello world' hello world # ----------------------------------------- I can share the core dump, in case that's useful. On this system, the qemu-aarch64 binary on the host is statically built and binfmt_misc is configured as follows: ----------------------------------------- :aarch64:M::\x7f\x45\x4c\x46\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7:\xff\xff\xff\xff\xff\xff\xff\xfc\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-aarch64:CF ----------------------------------------- -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1829459 Title: qemu seems to lack support for pid namespace. Status in QEMU: New Bug description: # Version qemu-4.0.0 glibc-2.28 # commands used to launch qemu-aarch64 in user mode. : ${QEMU_BINFMT_FLAGS:=OC} printf '%s\n' ':qemu- aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin /qemu-aarch64:'"${QEMU_BINFMT_FLAGS}" >/proc/sys/fs/binfmt_misc/register > sudo cp /usr/bin/qemu-aarch64 $RPI/usr/bin > sudo chroot $RPI /bin/ksh -l # host Gentoo Linux amd64 # Guest Gentoo Linux aarch64 # The problem that I have "emerge" program fails due to the error, "qemu: qemu_thread_create: Invalid argument". "emerge" is Gentoo's package manager that compiles and installs packages. # Workaround Disable pid-sandbox in emerge. # How to reproduce the issue Execute unshare --pid -- echo hello world or python -c "import portage.process; portage.process.spawn(['echo', 'hello', 'world'], unshare_pid=True)" To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1829459/+subscriptions
