I only have one s390x guest and adding another would be painful due to the slowness of its emulation :) but I have just tried removing all of /etc/ssh and reinstalling openssh-client/openssh-server, same crash.
To be clear, this is only happening on my s390x guest. I have a few other non-x86 qemu guests (arm64, ppc64el, riscv64, etc) which have also been upgraded to jammy, none of which have this problem. So I'm willing to bet this is more of a kernel or qemu problem and that openssh is just a symptom. (Though it seems to be a recurring indicative symptom... ISTR openssh segfaults during the bootstrap of riscv64 on qemu; William Grant may be able to chime in.) I've attached my libvirt definition in case it's relevant, but it's pretty standard. ** Attachment added: "s390x-dev.xml" https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1970076/+attachment/5584015/+files/s390x-dev.xml -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1970076 Title: "User process fault: interruption code 0011 ilc:3" on SSH client/server upon Jammy upgrade Status in openssh package in Ubuntu: New Bug description: This s390x VM has been upgraded to Jammy, including the host (qemu- system-s390x 1:6.2+dfsg-2ubuntu6). Now any attempt to use ssh, or any incoming sshd attempt immediately results in e.g.: ryan@s390x-dev:~$ ssh g...@github.com [ 433.672800] User process fault: interruption code 0011 ilc:3 in libc.so.6[3ffa6c00000+1ca000] [ 433.672946] Failing address: 000002aa0b84d000 TEID: 000002aa0b84d800 [ 433.672977] Fault in primary space mode while using user ASCE. [ 433.673030] AS:0000000002bc01c7 R3:00000000087cc007 S:000000000798a000 P:0000000000000400 Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1970076/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp