On 02/04/2018 04:30 PM, John Paul Adrian Glaubitz wrote:
On 02/04/2018 04:22 PM, Frank Scheiner wrote:
Thanks Adrian, tried that, but didn't help. After a restart, segfaults still 
happen when trying to login via serial console. But in the process of `apt -f
install` also libc-bin, libc-dev-bin, libc6 and libc6-dev were upgraded again. 
Not sure if I should have canceled those upgrades after:


Yes, your packages are no up-to-date if you're still on glibc_2.25.

They weren't up-to-date before doing `apt -f install` as I downgraded to the version of libc I had before doing the upgrade yesterday. But libc got updated to 2.26 during `apt -f install` - a recent segfault message also shows this:

```
v245 login: [ 46.563987] e1000e: enp8s0f0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[   46.564690] IPv6: ADDRCONF(NETDEV_CHANGE): enp8s0f0: link becomes ready
root
Password:
[ 51.434172] login[622]: segfault at 30 ip ffff800100517644 (rpc ffff8001020f9d54) sp 000007feffb7c451 error 1 in libc-2.26.so[ffff80010046c000+15e000]
```

Only the other (systemd related) packages I downgraded earlier were still on the older versions after the reboot. But I now did an `apt dist-upgrade` with `/etc/apt/sources.list`:

```
deb http://ftp.ports.debian.org/debian-ports/ sid main
deb http://ftp.ports.debian.org/debian-ports/ experimental main
deb http://ftp.ports.debian.org/debian-ports/ unreleased main
```

..so they should be up-to-date now. But that also didn't help, after a reboot, segfaults still happen when trying to login via serial port.

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