[Bug 407297] Re: PANIC: internal error (usershare related)

[Bryan Quigley]

This should have expired already, closing.

** Changed in: samba (Ubuntu)
       Status: Incomplete => Invalid

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Title:
  PANIC: internal error (usershare related)

Status in Samba:
  Invalid
Status in “samba” package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: samba

  I've set up a samba usershare in ubuntu 9.04 using samba
  2:3.3.2-1ubuntu3.1

  [snip]
  cat /var/lib/samba/usershares/us 
  #VERSION 2
  path=/home/lezuo/Desktop/us
  comment=
  usershare_acl=S-1-1-0:F
  guest_ok=n
  [snap]

  which _IS_ working as I can write/read files on it. I have a visual
  studio source project hosted there. Every few minutes a "data loss on
  write" message appears in windows. It is always affecting the projects
  .ncb file. Each time this message appears the following lines appear
  in /var/log/samba/log.workstation:

  [2009/07/31 11:37:14,  0] param/loadparm.c:process_usershare_file(8322)
    process_usershare_file: stat of /var/lib/samba/usershares/us failed. Permission denied
  [2009/07/31 11:37:21,  0] param/loadparm.c:process_usershare_file(8322)
    process_usershare_file: stat of /var/lib/samba/usershares/us failed. Permission denied
  [2009/07/31 11:37:21,  0] lib/substitute.c:alloc_sub_basic(561)
    alloc_sub_basic: NULL source string!  This should not happen
  [2009/07/31 11:37:21,  0] lib/substitute.c:alloc_sub_basic(561)
    alloc_sub_basic: NULL source string!  This should not happen
  [2009/07/31 11:37:21,  0] lib/fault.c:fault_report(40)
    ===============================================================
  [2009/07/31 11:37:21,  0] lib/fault.c:fault_report(41)
    INTERNAL ERROR: Signal 11 in pid 7287 (3.3.2)
    Please read the Trouble-Shooting section of the Samba3-HOWTO
  [2009/07/31 11:37:21,  0] lib/fault.c:fault_report(43)
    
    From: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf
  [2009/07/31 11:37:21,  0] lib/fault.c:fault_report(44)
    ===============================================================
  [2009/07/31 11:37:21,  0] lib/util.c:smb_panic(1673)
    PANIC (pid 7287): internal error
  [2009/07/31 11:37:21,  0] lib/util.c:log_stack_trace(1777)
    BACKTRACE: 12 stack frames:
     #0 /usr/sbin/smbd(log_stack_trace+0x2d) [0xb7c6917c]
     #1 /usr/sbin/smbd(smb_panic+0x80) [0xb7c692d9]
     #2 /usr/sbin/smbd [0xb7c54c7e]
     #3 [0xb7a9c400]
     #4 /usr/sbin/smbd [0xb7ec009a]
     #5 /usr/sbin/smbd [0xb7ecb91d]
     #6 /usr/sbin/smbd(reply_trans2+0x69f) [0xb7ecdba4]
     #7 /usr/sbin/smbd [0xb7b64bf0]
     #8 /usr/sbin/smbd(smbd_process+0xf44) [0xb7b66c2c]
     #9 /usr/sbin/smbd(main+0x1126) [0xb7b2e2ff]
     #10 /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7633775]
     #11 /usr/sbin/smbd [0xb7b2b071]
  [2009/07/31 11:37:21,  0] lib/util.c:smb_panic(1678)
    smb_panic(): calling panic action [/usr/share/samba/panic-action 7287]
  [2009/07/31 11:37:21,  0] lib/util.c:smb_panic(1686)
    smb_panic(): action returned status 0
  [2009/07/31 11:37:21,  0] lib/fault.c:dump_core(231)
    dumping core in /var/log/samba/cores/smbd
  [2009/07/31 11:37:25,  0] param/loadparm.c:process_usershare_file(8322)
    process_usershare_file: stat of /var/lib/samba/usershares/us failed. Permission denied
  [2009/07/31 11:37:30,  0] lib/substitute.c:alloc_sub_basic(561)
    alloc_sub_basic: NULL source string!  This should not happen

  I've tried to debug it further but was unable to obtain a coredump /
  attach a debugger. The "Permission denied" messages appears a few
  times when samba recorvers (sometimes just once, sometimes 3 times - I
  suspect some race here?).

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