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[paul_crane <pscrane@xxxxxxxxx>]

Public bug reported:

Hi Everyone,

I'm running Ubuntu 14.04, and the samba package from the repos, and am
getting the following panic-action email when the system starts up. I'm
also not able to start samba manually after boot either.

Here's a back-trace:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
0xb7707424 in __kernel_vsyscall ()
#0  0xb7707424 in __kernel_vsyscall ()
#1  0xb6f08e53 in __waitpid_nocancel () at ../sysdeps/unix/syscall-template.S:81
#2  0xb6e92fcd in do_system (line=line@entry=0xbfa71a64 "/usr/share/samba/panic-action 1001") at ../sysdeps/posix/system.c:148
#3  0xb6e933d0 in __libc_system (line=line@entry=0xbfa71a64 "/usr/share/samba/panic-action 1001") at ../sysdeps/posix/system.c:184
#4  0xb76d810b in system (line=line@entry=0xbfa71a64 "/usr/share/samba/panic-action 1001") at pt-system.c:28
#5  0xb76af3bd in smb_panic_default (why=0xb76bc552 "internal error") at ../lib/util/fault.c:134
#6  smb_panic (why=why@entry=0xb76bc552 "internal error") at ../lib/util/fault.c:162
#7  0xb76af551 in fault_report (sig=11) at ../lib/util/fault.c:77
#8  sig_fault (sig=11) at ../lib/util/fault.c:88
#9  <signal handler called>
#10 __opendirat (dfd=dfd@entry=-100, name=name@entry=0x0) at ../sysdeps/posix/opendir.c:91
#11 0xb6f04a7d in __opendir (name=0x0) at ../sysdeps/posix/opendir.c:160
#12 0xb773253f in recursive_delete (path=0x0) at ../source4/smbd/server.c:56
#13 0xb7732e6c in cleanup_tmp_files (lp_ctx=0xb77e1018) at ../source4/smbd/server.c:102
#14 binary_smbd_main (argc=<optimized out>, argv=<optimized out>, binary_name=0xb77362e2 "samba") at ../source4/smbd/server.c:385
#15 0xb772e431 in main (argc=2, argv=0xbfa724b4) at ../source4/smbd/server.c:514
A debugging session is active.

        Inferior 1 [process 1001] will be detached.

If I'm interpreting right, the recursive_delete is getting a null path
which is causing the problems.

Other information:

$ lsb_release -rd
Description:	Ubuntu 14.04 LTS
Release:	14.04

$ apt-cache policy samba
samba:
  Installed: 2:4.1.6+dfsg-1ubuntu2.14.04.2
  Candidate: 2:4.1.6+dfsg-1ubuntu2.14.04.2
  Version table:
 *** 2:4.1.6+dfsg-1ubuntu2.14.04.2 0
        500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty-updates/main i386 Packages
        500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty-security/main i386 Packages
        100 /var/lib/dpkg/status
     2:4.1.6+dfsg-1ubuntu2 0
        500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty/main i386 Packages

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1342574

Title:
  Samba crashing on null path in cleanup_tmp_files

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