[Bug 913809] Re: smbd crashed with SIGABRT in rep_strlcpy()/null pointer in connections_fetch_entry

[Eric Biggers]

I am experiencing this problem with Samba 3.6.3 on Ubuntu 12.04.  I've
attached a tarball containing some files that may be useful in
diagnosing the problem.  They are:

- log.smbd for a SAMBA server session (debug level 5)
- log.127.0.0.1 for a session with the localhost where I mounted a usershare, listed files, then unmounted it.
- smb.conf
- usershares directory (from /var/lib/samba/usershares)

The internal error is near the end of log.127.0.0.1, when the share was
unmounted.  I think the error might always happen when the connection is
closed.

Also, I was unable to reproduce the problem after deleting the
usershares and replacing them with sections in smb.conf.   (The four
usershares had previously been created using Nautilus).


** Attachment added: "samba-bug.tar.gz"
   https://bugs.launchpad.net/ubuntu/+source/samba/+bug/913809/+attachment/3323438/+files/samba-bug.tar.gz

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https://bugs.launchpad.net/bugs/913809

Title:
  smbd crashed with SIGABRT in rep_strlcpy()/null pointer in
  connections_fetch_entry

Status in Samba:
  Unknown
Status in “samba” package in Ubuntu:
  Incomplete

Bug description:
  connecting from winxp when this occurred

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: samba 2:3.6.1-3ubuntu2
  ProcVersionSignature: Ubuntu 3.2.0-8.14-generic 3.2.0
  Uname: Linux 3.2.0-8-generic x86_64
  ApportVersion: 1.90-0ubuntu1
  Architecture: amd64
  Date: Mon Jan  9 09:22:58 2012
  ExecutablePath: /usr/sbin/smbd
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  ProcCmdline: smbd -F
  ProcEnviron: PATH=(custom, no user)
  Signal: 6
  SourcePackage: samba
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libc.so.6
   rep_strlcpy ()
   connections_fetch_entry ()
   yield_connection ()
   close_cnum ()
  Title: smbd crashed with SIGABRT in rep_strlcpy()
  UpgradeStatus: Upgraded to precise on 2012-01-09 (0 days ago)
  UserGroups:

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