Scratching about to try and find any other reports.

There is something going on in https://tracker.zentyal.org/issues/3130
and a handful of their other bugs that looks similar.  Zentyal is listed
as a drop in replacement for a Microsoft Small Business Server so it
sounds likely they it could include Samba.  That was only generated from
a search for "strlen () at ../sysdeps/x86_64/strlen.S:106 Samba" though
so it could be unrelated.

A Samba bug also comes up for a later package
https://bugzilla.samba.org/show_bug.cgi?id=11530 but reading that
suggests the strlen search I am doing is too general to find more than
general protection faults.  So what would "E_md4hash (passwd=  p16=
entry= ) at ../libcli/auth/smbencrypt.c:78" turn up?

That is more hopeful.  There is this post 
http://gathering.tweakers.net/forum/list_messages/1607613 that seems to relate 
to Ubuntu 14.04 as well and contains a  similar segment of stack trace in it:
No locals.
#10 0xb768afb1 in push_ucs2_talloc (ctx=ctx@entry=0x0, 
dest=dest@entry=0xbfd3b61c, src=src@entry=0x0, 
converted_size=converted_size@entry=0xbfd3b618) at 
../lib/util/charset/pull_push.c:41
src_len = <optimized out>
#11 0xb724e574 in E_md4hash (passwd=0x0, p16=p16@entry=0xbfd3b6a8 "") at 
../libcli/auth/smbencrypt.c:78
len = 64
wpwd = 0xb7665000
ret = <optimized out>
#12 0xb7421898 in create_volume_objectid (conn=0xb82c1ac8, 
objid=objid@entry=0xbfd3b6a8 "") at ../source3/smbd/trans2.c:3017
No locals.
#13 0xb752fbde in vfswrap_fsctl (handle=0xb82c1910, fsp=0xb82ea670, 
ctx=0xb82df308, function=590016, req_flags=49217, _in_data=0x0, in_len=0, 
_out_data=0xbfd3b798, max_out_len=64, out_len=0xbfd3b79c) at 
../source3/modules/vfs_default.c:1066
Someone else might do a better job of translating the page.  I can only vaguely 
follow it but it seems to point to 
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/916576 near the end.  Bug 
#916576 was marked expired in 2013-01-02 but there are some diagnostic requests 
in there that I can attempt.  It also suggests some relation to bug 913809 
which lists a huge number of duplicates and two Samba bugs.  The Samba bugs 
mentioned seemed to trail off as unreproducible.  


I'll leave the related items there for now.  I will set my smb.cong log level 5 
and provide the output of `sudo testparm -s` as requested in Bug #916576 and 
leave it there for now.  

$ sudo testparm -s
Load smb config files from /etc/samba/smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section "[printers]"
Processing section "[print$]"
Loaded services file OK.
Server role: ROLE_STANDALONE
[global]
        server string = %h server (Samba, Ubuntu)
        server role = standalone server
        map to guest = Bad User
        obey pam restrictions = Yes
        pam password change = Yes
        passwd program = /usr/bin/passwd %u
        passwd chat = *Enter\snew\s*\spassword:* %n\n 
*Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
        unix password sync = Yes
        syslog = 0
        log file = /var/log/samba/log.%m
        dns proxy = No
        usershare allow guests = Yes
        panic action = /usr/share/samba/panic-action %d
        idmap config * : backend = tdb

[printers]
        comment = All Printers
        path = /var/spool/samba
        create mask = 0700
        printable = Yes
        print ok = Yes
        browseable = No

[print$]
        comment = Printer Drivers
        path = /var/lib/samba/printers


** Bug watch added: Samba Bugzilla #11530
   https://bugzilla.samba.org/show_bug.cgi?id=11530

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https://bugs.launchpad.net/bugs/1514766

Title:
  smbd crashed with SIGABRT in strlen() while accessing a share from a
  W7 client

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