[Pkg-auth-maintainers] Bug#783395: libpam-yubico: Segfault when using Yubikey for authentication prevents login
Stephen Paul Weber
singpolyma at singpolyma.net
Thu Mar 24 20:45:02 UTC 2016
On Sun, 26 Apr 2015 20:17:00 +0200 =?utf-8?q?Henrik_St=C3=B8rner?= <henrik at hswn.dk> wrote:
> After upgrading from Wheezy to Jessie, Yubikey authentication has stoppped working.
> Apr 26 12:55:41 osiris kernel: [ 2717.882751] login[13942]: segfault at 7f6627ae2030 ip 00007f6626f67d28 sp 00007f661cc1b538 error 4 in libc-2.19.so[7f6626ee3000+19f000]
I had this problem also. The bug is not in the pam module, it seems, but in
the client. Installing libykclient3_2.6-1_amd64.deb from oldstable fixes
this issue for me, but upgrading to libykclient3_2.14-1_amd64.deb from sid
does not. So this is a regression in libykclient3 since oldstable.
Strangely, the segfault does not happen when I use yubikey with sudo. Also,
when I use with pwauth under gdb with thread debugging enabled, then also it
does not happen. But under gdb without thread debugging or without gdb then
I still get the segfault with pwauth on affected versions. So maybe it is
a race condition of some kind?
--
Stephen Paul Weber, @singpolyma
See <http://singpolyma.net> for how I prefer to be contacted
edition right joseph
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