Comment 9 for bug 1745817

Sounds good. Let me know if there is more information I can get out of gdb.

On Fri, Apr 13, 2018 at 8:14 AM, Andreas Hasenack <email address hidden>
wrote:

> Thanks for the troubleshooting. I'm taking a look.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1745817
>
> Title:
> autofs 5.1.2-1ubuntu2 crashes on nfs mount
>
> Status in autofs package in Ubuntu:
> Confirmed
>
> Bug description:
> Using the latest autofs package (with libtirpc support) the automount
> process crashes when mounting a nfs share (at least when using IPv4).
>
> I am using a file /etc/auto.master.d/net.autofs to be able to mount
> arbitrary nfs shares to /net:
>
> /net -hosts -intr,soft --timeout=60
>
> When trying to access a share (e.g. with the command "cd
> /net/192.168.1.104" - using the hostname has the same effect)
> automount crashes:
>
> $ sudo systemctl stop autofs.service
> $ source /etc/default/autofs
> $ sudo gdb --args /usr/sbin/automount $OPTIONS -d -v -f
> (gdb) run
> [...]
> attempting to mount entry /net/192.168.1.104
> lookup_mount: lookup(hosts): 192.168.1.104 -> (null)
> get_exports: lookup(hosts): fetchng export list for 192.168.1.104
>
> Thread 6 "automount" received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7ffff7fc7700 (LWP 4640)]
> 0x0000000000000000 in ?? ()
> (gdb) bt
> #0 0x0000000000000000 in ?? ()
> #1 0x00007ffff435b8dc in ?? () from /lib/x86_64-linux-gnu/libtirpc.so.1
> #2 0x00007ffff29b11ec in ?? () from /usr/lib/x86_64-linux-gnu/
> autofs/lookup_hosts.so
> #3 0x00007ffff29b23fa in rpc_get_exports () from
> /usr/lib/x86_64-linux-gnu/autofs/lookup_hosts.so
> #4 0x00007ffff29ad516 in ?? () from /usr/lib/x86_64-linux-gnu/
> autofs/lookup_hosts.so
> #5 0x00007ffff29ae013 in lookup_mount () from /usr/lib/x86_64-linux-gnu/
> autofs/lookup_hosts.so
> #6 0x000055555556c70d in do_lookup_mount ()
> #7 0x000055555556d441 in lookup_nss_mount ()
> #8 0x00005555555634d5 in ?? ()
> #9 0x00007ffff7bbd7fc in start_thread () from /lib/x86_64-linux-gnu/
> libpthread.so.0
> #10 0x00007ffff7325b0f in clone () from /lib/x86_64-linux-gnu/libc.so.6
>
> The segfault disappears if the autofs package is recompiled without
> "--with-libtirpc" in debian/rules.
>
> $ lsb_release -rd
> Description: Ubuntu Bionic Beaver (development branch)
> Release: 18.04
>
> $ apt-cache policy autofs
> autofs:
> Installiert: 5.1.2-1ubuntu2
> Installationskandidat: 5.1.2-1ubuntu2
> Versionstabelle:
> *** 5.1.2-1ubuntu2 500
> 500 http://de.archive.ubuntu.com/ubuntu bionic/main amd64
> Packages
> 100 /var/lib/dpkg/status
>
> $ apt-cache policy libtirpc1
> libtirpc1:
> Installiert: 0.2.5-1.2
> Installationskandidat: 0.2.5-1.2
> Versionstabelle:
> *** 0.2.5-1.2 500
> 500 http://de.archive.ubuntu.com/ubuntu bionic/main amd64
> Packages
> 100 /var/lib/dpkg/status
>
> BTW: libtirpc1 seems to be quite old in Ubuntu, the current release is
> 1.0.2
>
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>