I can reproduce the failure manually now, in that test environment. Saving the info here.
root@n-ccache:/tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress# /usr/bin/ssh -m hmac-sha2-512 -c aes128-ctr -F /tmp/andreas//regress/ssh_proxy -o proxycommand="sudo env SSH_SK_HELPER= sh /tmp/andreas//regress/sshd-log-wrapper.sh -i -f /tmp/andreas//regress/sshd_proxy | /tmp/andreas//regress/modpipe -wm xor:2900:1" -oServerAliveInterval=1 -oServerAliveCountMax=30 999.999.999.999 printf "%4096" " " # cat ssh_proxy Host * Hostname 127.0.0.1 HostKeyAlias localhost-with-alias Port 4242 User openssh-tests GlobalKnownHostsFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/known_hosts UserKnownHostsFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/known_hosts PubkeyAuthentication yes ChallengeResponseAuthentication no PasswordAuthentication no BatchMode yes StrictHostKeyChecking yes LogLevel DEBUG3 SecurityKeyProvider /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/misc/sk-dummy/sk-dummy.so IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ssh-ed25519 IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sk-ssh-ed25...@openssh.com IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ecdsa-sha2-nistp256 IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ecdsa-sha2-nistp384 IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ecdsa-sha2-nistp521 IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sk-ecdsa-sha2-nistp...@openssh.com IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ssh-dss IdentityFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ssh-rsa proxycommand sudo env SSH_SK_HELPER="" /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sshd-log-wrapper.sh -i -f /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sshd_proxy # cat sshd-log-wrapper.sh #!/bin/sh timestamp="`/tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/timestamp`" logfile="/tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/log/${timestamp}.sshd.$$.log" rm -f /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sshd.log touch $logfile test -z "sudo" || chown openssh-tests $logfile ln -f -s ${logfile} /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sshd.log echo "Executing: /usr/sbin/sshd $@" log ${logfile} >>/tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/regress.log echo "Executing: /usr/sbin/sshd $@" >>${logfile} exec /usr/sbin/sshd -E${logfile} "$@" # cat sshd_proxy StrictModes no Port 4242 AddressFamily inet ListenAddress 127.0.0.1 #ListenAddress ::1 PidFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/pidfile AuthorizedKeysFile /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/authorized_keys_%u LogLevel DEBUG3 AcceptEnv _XXX_TEST_* AcceptEnv _XXX_TEST Subsystem sftp /usr/lib/openssh/sftp-server UsePAM yes StrictModes no StrictModes no SecurityKeyProvider /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/misc/sk-dummy/sk-dummy.so HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ssh-ed25519 HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sk-ssh-ed25...@openssh.com HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ecdsa-sha2-nistp256 HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ecdsa-sha2-nistp384 HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ecdsa-sha2-nistp521 HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/sk-ecdsa-sha2-nistp...@openssh.com HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ssh-dss HostKey /tmp/autopkgtest.mlareh/autopkgtest_tmp/user/regress/ssh-rsa Ciphers=aes128-ctr MACs=hmac-sha2-512 I tried different values for the printf amount (4096, 2048, 16386). I also increased the buffer size in the modpipe.c utility. Nothing like this helped. I'm trying now to get rid of the modpipe intermediary, to see if that's the thing getting in the way of the flow of data. -- 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/2091943 Title: OpenSSH autopkgtests do not like tilde character in its version string (e.g. ~ppa1) Status in openssh package in Ubuntu: New Bug description: Starting with Noble, the openssh autopkgtest "regress" (specifically "integrity.sh") fails when the version string contains a tilde character, such as "~ppa1". In such case, it would fail with a log like this: """ 943s 15:17:52.628196592 O: aes128-...@openssh.com: expected 10 mac errors, got 9 943s 15:17:52.643425013 O: test integrity: aes256-...@openssh.com @2900 973s 15:18:22.861245950 O: unexpected error mac aes256-...@openssh.com at 2900: Executing: /usr/bin/ssh -c aes256-...@openssh.com -F /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/ssh_proxy -o proxycommand=sudo env SSH_SK_HELPER= sh /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/sshd-log-wrapper.sh -i -f /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/sshd_proxy | /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/modpipe -wm xor:2900:1 -oServerAliveInterval=1 -oServerAliveCountMax=30 999.999.999.999 printf "%4096s" " ".Connection to UNKNOWN port 65535 timed out. 973s 15:18:22.873852332 O: test integrity: aes256-...@openssh.com @2901 974s 15:18:23.054367085 O: test integrity: aes256-...@openssh.com @2902 974s 15:18:23.233795263 O: test integrity: aes256-...@openssh.com @2903 974s 15:18:23.414326814 O: test integrity: aes256-...@openssh.com @2904 974s 15:18:23.593728032 O: test integrity: aes256-...@openssh.com @2905 974s 15:18:23.773737617 O: test integrity: aes256-...@openssh.com @2906 974s 15:18:23.953240316 O: test integrity: aes256-...@openssh.com @2907 975s 15:18:24.132768013 O: test integrity: aes256-...@openssh.com @2908 975s 15:18:24.314160170 O: test integrity: aes256-...@openssh.com @2909 975s 15:18:24.481575251 O: test integrity: 10 errors: mac 9 padding 0 length 0 timeout 0 975s 15:18:24.511336625 O: aes256-...@openssh.com: expected 10 mac errors, got 9 975s 15:18:24.527543807 O: test integrity: chacha20-poly1...@openssh.com @2900 1005s 15:18:54.780404775 O: unexpected error mac chacha20-poly1...@openssh.com at 2900: Executing: /usr/bin/ssh -c chacha20-poly1...@openssh.com -F /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/ssh_proxy -o proxycommand=sudo env SSH_SK_HELPER= sh /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/sshd-log-wrapper.sh -i -f /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/sshd_proxy | /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/modpipe -wm xor:2900:1 -oServerAliveInterval=1 -oServerAliveCountMax=30 999.999.999.999 printf "%4096s" " ".Connection to UNKNOWN port 65535 timed out. 1005s 15:18:54.793199833 O: test integrity: chacha20-poly1...@openssh.com @2901 1006s 15:18:54.974724705 O: test integrity: chacha20-poly1...@openssh.com @2902 1006s 15:18:55.156217135 O: test integrity: chacha20-poly1...@openssh.com @2903 1006s 15:18:55.338105249 O: test integrity: chacha20-poly1...@openssh.com @2904 1006s 15:18:55.518876831 O: test integrity: chacha20-poly1...@openssh.com @2905 1006s 15:18:55.702486443 O: test integrity: chacha20-poly1...@openssh.com @2906 1006s 15:18:55.886914864 O: test integrity: chacha20-poly1...@openssh.com @2907 1007s 15:18:56.072806620 O: test integrity: chacha20-poly1...@openssh.com @2908 1007s 15:18:56.255436459 O: test integrity: chacha20-poly1...@openssh.com @2909 1007s 15:18:56.426811377 O: test integrity: 10 errors: mac 9 padding 0 length 0 timeout 0 1007s 15:18:56.461882513 O: chacha20-poly1...@openssh.com: expected 10 mac errors, got 9 1007s 15:18:56.462364399 E: make: *** [Makefile:252: t-exec] Error 1 1007s 15:18:56.463874215 O: failed integrity 1007s 15:18:56.466716165 O: make: Leaving directory '/tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress' 1007s 15:18:56.468626306 O: ==> /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/failed-regress.log <== 1007s 15:18:56.467685576 E: tail: error writing 'standard output': Resource temporarily unavailable 1007s 15:18:56.470363804 E: tail: error writing 'standard output': Resource temporarily unavailable 1007s 15:18:56.470451085 O: Executing: /usr/bin/ssh -Q key-plain log /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/log/20241216T151643.962770.ssh.48972.log 1007s 15:18:56.471894741 O: Executing: /usr/bin/ssh -Q key-plain log /tmp/autopkgtest.IEqRfF/autopkgtest_tmp/user/regress/log/20241216T151643.972077.ssh.48979.log 1007s 15:18:56.471892661 E: tail: error writing 'standard output': Resource temporarily unavailable """ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/2091943/+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