Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95.

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* Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95.
@ 2003-10-28 20:57 Rodrigo Medina
  2003-10-29  9:40 ` Corinna Vinschen
  2003-10-31 21:40 ` Christian Weinberger
  0 siblings, 2 replies; 18+ messages in thread
From: Rodrigo Medina @ 2003-10-28 20:57 UTC (permalink / raw)
  To: cygwin

Hello!
I have been using cygwin 1.3.22 in a W95 machine with no problems.
I am now installing cygwin 1.5.5 in another W95 machine. I get the
following crash:

bash-2.05b$ ssh -l rmedina pion
Segmentation fault (core dumped)
bash-2.05b$ 

bash-2.05b$ cat SSH.EXE.stackdump 
Exception: STATUS_ACCESS_VIOLATION at eip=610BA4C1
eax=00000000 ebx=005606D4 ecx=FFFFFFFF edx=00000056 esi=00000010 edi=00000056
ebp=0078F658 esp=0078F654 program=C:\CYGWIN\BIN\SSH.EXE
cs=014F ds=0157 es=0157 fs=3F6F gs=3DD6 ss=0157
Stack trace:
Frame     Function  Args
0078F658  610BA4C1  (00000056, 7C3E3E7E, 00000030, 00000000)
0078F6A8  610498F4  (00000000, 005606C6, 00000002, 00000000)
0078F6F8  61044D0F  (0040B865, 0040B861, 000101BF, 00010000)
0078FB98  0040BC18  (6160260C, 00437380, 00000000, 00000000)
0078FD68  00402F9E  (00000000, 6160110C, 100F0330, 0078FD9C)
0078FDB8  61005018  (610CFEE0, FFFFFFFE, 00000002, 610CFE04)
0078FE08  610052ED  (00000000, 00000000, BFFBFA00, 0078FF68)
0078FE28  00434511  (004024D0, 037F0500, 0078FF78, BFF88E93)
0078FE38  0040103C  (816454B8, 81641FD8, 00580000, 00687353)
0078FF78  BFF88E93  (BFF88A87, 00000019, 816454B8, 00000000)
    243 [main] ssh 3401889 handle_exceptions: Error while dumping state (probably corrupted stack)

My configuration is:
bash-2.05b$ uname -a
CYGWIN_95-4.0 rixio2.ivic.ve 1.5.5(0.94/3/2) 2003-09-20 16:31 i586 unknown unknown Cygwin

The ssh version is:
bash-2.05b$ ssh -V
OpenSSH_3.7.1p2, SSH protocols 1.5/2.0, OpenSSL 0.9.7c 30 Sep 2003

gdb gives:
bash-2.05b$ gdb ssh
GNU gdb 2003-09-20-cvs (cygwin-special)
Copyright 2003 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...(no debugging symbols found)...
(gdb) run -l rmedina pion
Starting program: /usr/bin/ssh.exe -l rmedina pion

Program received signal SIGILL, Illegal instruction.
0x004024d0 in ?? ()
(gdb) bt
#0  0x004024d0 in ?? ()
#1  0x61005018 in forkpty () from /usr/bin/cygwin1.dll
#2  0x610052ed in dll_crt0@0 () from /usr/bin/cygwin1.dll
#3  0x00434511 in ?? ()
(gdb) 

The ssh deamon sshd works fine.
I hope that somebody could help me. Thanks in advance,

Rodrigo Medina



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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95.
  2003-10-28 20:57 Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95 Rodrigo Medina
@ 2003-10-29  9:40 ` Corinna Vinschen
  2003-10-31 21:40 ` Christian Weinberger
  1 sibling, 0 replies; 18+ messages in thread
From: Corinna Vinschen @ 2003-10-29  9:40 UTC (permalink / raw)
  To: cygwin

On Tue, Oct 28, 2003 at 03:01:16PM -0400, Rodrigo Medina wrote:
> Hello!
> I have been using cygwin 1.3.22 in a W95 machine with no problems.
> I am now installing cygwin 1.5.5 in another W95 machine. I get the
> following crash:
> 
> bash-2.05b$ ssh -l rmedina pion
> Segmentation fault (core dumped)
> bash-2.05b$ 
> [...]

Works for me on 98.  I don't have a 95 system for testing.  Do you
have more than one cygwin1.dll in the path?  Please send cygcheck
output according to http://cygwin.com/problems.html

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95.
  2003-10-28 20:57 Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95 Rodrigo Medina
  2003-10-29  9:40 ` Corinna Vinschen
@ 2003-10-31 21:40 ` Christian Weinberger
  1 sibling, 0 replies; 18+ messages in thread
From: Christian Weinberger @ 2003-10-31 21:40 UTC (permalink / raw)
  To: cygwin

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1095 bytes --]

Rodrigo Medina <rmedina@ivic.ve> wrote in
news:200310281901.h9SJ1GAb015767@pion.ivic.ve: 

> I have been using cygwin 1.3.22 in a W95 machine with no problems.
> I am now installing cygwin 1.5.5 in another W95 machine. I get the
> following crash:
> 
> bash-2.05b$ ssh -l rmedina pion
> Segmentation fault (core dumped)
> bash-2.05b$ 
> 
> Rodrigo Medina
> 

My further tests showed up that my ssh crash had a different cause:

I´ve two users, root and ssh. ssh is the owner for the sshd that I run.

When I call "ssh localhost" from each of the two users, it works fine.
But when I do a su to switch to the other user, the ssh call crashes.
When I use login to change to the other user, everythings works fine.

So this seems to be a "su" issue. I read somewhere that su is no longer 
supported. Is this still true?

Hope this may help for further development!

Christian

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
@ 2003-10-30  0:29 Rodrigo Medina
  2003-10-30  4:34 ` Pierre A. Humblet
  0 siblings, 1 reply; 18+ messages in thread
From: Rodrigo Medina @ 2003-10-30  0:29 UTC (permalink / raw)
  To: cygwin


Corinna wrote:

>Works for me on 98.  I don't have a 95 system for testing.  Do you
>have more than one cygwin1.dll in the path?  Please send cygcheck
>output according to http://cygwin.com/problems.html

Corinna:

This is the first time that cygwin is installed in this machine. In any case
with FIND only C:\cygwin\bin\cygwin1.dll appears.

The output of 'cygcheck -v ssh' is:

Found: C:\cygwin\bin\ssh.exe
C:/cygwin/bin/ssh.exe - os=4.0 img=1.0 sys=4.0
  C:\cygwin\bin\cygcrypto-0.9.7.dll - os=4.0 img=1.0 sys=4.0
    "cygcrypto-0.9.7.dll" v0.0 ts=2003/9/30 12:49
    C:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
      "cygwin1.dll" v0.0 ts=2003/9/20 16:31
      C:\WINDOWS\SYSTEM\KERNEL32.dll - os=1.0 img=1.9 sys=4.0
        "KERNEL32.dll" v0.0 ts=1996/8/10 1:21
    C:\WINDOWS\SYSTEM\KERNEL32.dll (already done)
  C:\cygwin\bin\cygwin1.dll (already done)
  C:\cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
    "cygz.dll" v0.0 ts=2003/8/9 2:28
    C:\cygwin\bin\cygwin1.dll (already done)
    C:\WINDOWS\SYSTEM\KERNEL32.dll (already done)
  C:\WINDOWS\SYSTEM\KERNEL32.dll (already done)
  C:\cygwin\bin\cygwin1.dll (already done)
...
...
  C:\cygwin\bin\cygwin1.dll (already done)


The output of 'cygcheck -s -v' is:


Cygwin Win95/NT Configuration Diagnostics
Current System Time: Wed Oct 29 14:29:37 2003

Windows 95 Ver 4.0 Build 1111 

Path:	C:\cygwin\bin
	C:\cygwin\usr\local\bin
	.
	c:\MSDEV\BIN
	c:\WINDOWS
	c:\WINDOWS\COMMAND
	c:\GT
	c:\GT
	c:\ARCHIV~1\BORLAND\CBUILD~1\BIN
	c:\TEXMF\MIKTEX\BIN

Output from C:\cygwin\bin\id.exe (nontsec)
UID: 664(Rodrigo) GID: 544(all)
544(all)

Output from C:\cygwin\bin\id.exe (ntsec)
UID: 664(Rodrigo) GID: 544(all)
544(all)

SysDir: C:\WINDOWS\SYSTEM
WinDir: C:\WINDOWS

HOME = `C:\cygwin\home\Rodrigo'
PWD = `/home/Rodrigo'

BLASTER = `A220 I5 D1 H5 T5'
CMDLINE = `rxvt -cr green --colorUL blue --colorBD red -e bash -l -i'
COLORFGBG = `0;default;15'
COLORTERM = `rxvt-xpm'
COMSPEC = `C:\WINDOWS\COMMAND.COM'
DISPLAY = `:0'
HOMEDRIVE = `C:'
HOMEPATH = `\cygwin\home\Rodrigo'
INCLUDE = `C:\MSDEV\INCLUDE;""'
LESSCHARSET = `latin1'
LIB = `C:\MSDEV\LIB;""'
OLDPWD = `/usr/bin'
PROMPT = `$p$g'
SHLVL = `1'
TEMP = `c:\WINDOWS\TEMP'
TERM = `xterm'
TMP = `c:\WINDOWS\TEMP'
WINBOOTDIR = `C:\WINDOWS'
WINDIR = `C:\WINDOWS'
WINDOWID = `10036976'
_ = `/bin/cygcheck'

Use `-r' to scan registry

a:  fd           N/A    N/A                    
c:  hd  FAT32   3084Mb  54% CP    UN           
d:  cd           N/A    N/A                    

C:\cygwin      /          system  binmode
C:\cygwin/bin  /usr/bin   system  binmode
C:\cygwin/lib  /usr/lib   system  binmode
.              /cygdrive  system  binmode,cygdrive

Found: C:\cygwin\bin\awk.exe
Found: C:\cygwin\bin\bash.exe
Found: C:\cygwin\bin\cat.exe
Found: C:\cygwin\bin\cp.exe
Found: C:\cygwin\bin\cpp.exe
Found: C:\cygwin\bin\find.exe
Found: c:\WINDOWS\COMMAND\find.exe
Warning: C:\cygwin\bin\find.exe hides c:\WINDOWS\COMMAND\find.exe
Found: C:\cygwin\bin\gcc.exe
Found: C:\cygwin\bin\gdb.exe
Found: C:\cygwin\bin\grep.exe
Found: c:\ARCHIV~1\BORLAND\CBUILD~1\BIN\grep.exe
Warning: C:\cygwin\bin\grep.exe hides c:\ARCHIV~1\BORLAND\CBUILD~1\BIN\grep.exe
Found: C:\cygwin\bin\ld.exe
Found: C:\cygwin\bin\ls.exe
Found: c:\ARCHIV~1\BORLAND\CBUILD~1\BIN\make.exe
Found: C:\cygwin\bin\mv.exe
Found: C:\cygwin\bin\rm.exe
Found: C:\cygwin\bin\sed.exe
Found: C:\cygwin\bin\sh.exe
Found: C:\cygwin\bin\tar.exe

  802k 2003/09/15 C:\cygwin\bin\cygaspell-15.dll - os=4.0 img=1.0 sys=4.0
                  "cygaspell-15.dll" v0.0 ts=2003/9/15 8:32
   19k 2003/03/22 C:\cygwin\bin\cyggdbm.dll - os=4.0 img=1.0 sys=4.0
                  "cyggdbm.dll" v0.0 ts=2002/2/19 23:05
   28k 2003/07/20 C:\cygwin\bin\cyggdbm-3.dll - os=4.0 img=1.0 sys=4.0
                  "cyggdbm-3.dll" v0.0 ts=2003/7/20 3:58
   15k 2003/07/20 C:\cygwin\bin\cyggdbm_compat-3.dll - os=4.0 img=1.0 sys=4.0
                  "cyggdbm_compat-3.dll" v0.0 ts=2003/7/20 4:00
   30k 2003/08/11 C:\cygwin\bin\cyggdbm-4.dll - os=4.0 img=1.0 sys=4.0
                  "cyggdbm-4.dll" v0.0 ts=2003/8/10 22:12
   15k 2003/08/11 C:\cygwin\bin\cyggdbm_compat-4.dll - os=4.0 img=1.0 sys=4.0
                  "cyggdbm_compat-4.dll" v0.0 ts=2003/8/10 22:13
   12k 2003/08/10 C:\cygwin\bin\cyggettextpo-0.dll - os=4.0 img=1.0 sys=4.0
                  "cyggettextpo-0.dll" v0.0 ts=2003/8/10 18:11
   69k 2003/08/10 C:\cygwin\bin\cyggettextlib-0-12-1.dll - os=4.0 img=1.0 sys=4.0
                  "cyggettextlib-0-12-1.dll" v0.0 ts=2003/8/10 18:10
  134k 2003/08/10 C:\cygwin\bin\cyggettextsrc-0-12-1.dll - os=4.0 img=1.0 sys=4.0
                  "cyggettextsrc-0-12-1.dll" v0.0 ts=2003/8/10 18:10
  958k 2003/08/10 C:\cygwin\bin\cygiconv-2.dll - os=4.0 img=1.0 sys=4.0
                  "cygiconv-2.dll" v0.0 ts=2003/8/10 16:57
   22k 2001/12/13 C:\cygwin\bin\cygintl-1.dll - os=4.0 img=1.0 sys=4.0
                  "cygintl-1.dll" v0.0 ts=2001/12/13 5:28
   37k 2003/08/10 C:\cygwin\bin\cygintl-2.dll - os=4.0 img=1.0 sys=4.0
                  "cygintl-2.dll" v0.0 ts=2003/8/10 17:50
   45k 2001/04/25 C:\cygwin\bin\cygform5.dll - os=4.0 img=1.0 sys=4.0
                  "cygform5.dll" v0.0 ts=2001/4/25 1:28
   26k 2001/04/25 C:\cygwin\bin\cygmenu5.dll - os=4.0 img=1.0 sys=4.0
                  "cygmenu5.dll" v0.0 ts=2001/4/25 1:27
  156k 2001/04/25 C:\cygwin\bin\cygncurses++5.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses++5.dll" v0.0 ts=2001/4/25 1:29
  226k 2001/04/25 C:\cygwin\bin\cygncurses5.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses5.dll" v0.0 ts=2001/4/25 1:17
   15k 2001/04/25 C:\cygwin\bin\cygpanel5.dll - os=4.0 img=1.0 sys=4.0
                  "cygpanel5.dll" v0.0 ts=2001/4/25 1:27
   35k 2002/01/09 C:\cygwin\bin\cygform6.dll - os=4.0 img=1.0 sys=4.0
                  "cygform6.dll" v0.0 ts=2002/1/9 2:03
   20k 2002/01/09 C:\cygwin\bin\cygmenu6.dll - os=4.0 img=1.0 sys=4.0
                  "cygmenu6.dll" v0.0 ts=2002/1/9 2:03
  175k 2002/01/09 C:\cygwin\bin\cygncurses++6.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses++6.dll" v0.0 ts=2002/1/9 2:03
  202k 2002/01/09 C:\cygwin\bin\cygncurses6.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses6.dll" v0.0 ts=2002/1/9 2:03
   12k 2002/01/09 C:\cygwin\bin\cygpanel6.dll - os=4.0 img=1.0 sys=4.0
                  "cygpanel6.dll" v0.0 ts=2002/1/9 2:03
   48k 2003/08/09 C:\cygwin\bin\cygform7.dll - os=4.0 img=1.0 sys=4.0
                  "cygform7.dll" v0.0 ts=2003/8/9 5:25
   29k 2003/08/09 C:\cygwin\bin\cygmenu7.dll - os=4.0 img=1.0 sys=4.0
                  "cygmenu7.dll" v0.0 ts=2003/8/9 5:25
  224k 2003/08/09 C:\cygwin\bin\cygncurses7.dll - os=4.0 img=1.0 sys=4.0
                  "cygncurses7.dll" v0.0 ts=2003/8/9 5:24
   19k 2003/08/09 C:\cygwin\bin\cygpanel7.dll - os=4.0 img=1.0 sys=4.0
                  "cygpanel7.dll" v0.0 ts=2003/8/9 5:24
   63k 2003/04/11 C:\cygwin\bin\cygpcre.dll - os=4.0 img=1.0 sys=4.0
                  "cygpcre.dll" v0.0 ts=2003/4/11 4:31
   61k 2003/04/11 C:\cygwin\bin\cygpcreposix.dll - os=4.0 img=1.0 sys=4.0
                  "cygpcreposix.dll" v0.0 ts=2003/4/11 4:31
   22k 2002/06/09 C:\cygwin\bin\cygpopt-0.dll - os=4.0 img=1.0 sys=4.0
                  "cygpopt-0.dll" v0.0 ts=2002/6/9 1:45
   17k 2001/06/28 C:\cygwin\bin\cyghistory4.dll - os=4.0 img=1.0 sys=4.0
                  "cyghistory4.dll" v0.0 ts=2001/1/7 0:34
  108k 2001/06/28 C:\cygwin\bin\cygreadline4.dll - os=4.0 img=1.0 sys=4.0
                  "cygreadline4.dll" v0.0 ts=2001/1/7 0:34
   29k 2003/08/10 C:\cygwin\bin\cyghistory5.dll - os=4.0 img=1.0 sys=4.0
                  "cyghistory5.dll" v0.0 ts=2003/8/10 19:16
  148k 2003/08/10 C:\cygwin\bin\cygreadline5.dll - os=4.0 img=1.0 sys=4.0
                  "cygreadline5.dll" v0.0 ts=2003/8/10 19:16
  645k 2003/04/11 C:\cygwin\bin\cygcrypto.dll - os=4.0 img=1.0 sys=4.0
                  "cygcrypto.dll" v0.0 ts=2003/4/11 6:37
  165k 2003/04/11 C:\cygwin\bin\cygssl.dll - os=4.0 img=1.0 sys=4.0
                  "cygssl.dll" v0.0 ts=2003/4/11 6:37
   60k 2003/08/09 C:\cygwin\bin\cygz.dll - os=4.0 img=1.0 sys=4.0
                  "cygz.dll" v0.0 ts=2003/8/9 2:28
   61k 2003/08/09 C:\cygwin\bin\cygbz2-1.dll - os=4.0 img=1.0 sys=4.0
                  "cygbz2-1.dll" v0.0 ts=2003/8/9 2:35
   67k 2003/09/10 C:\cygwin\bin\cygpcre-0.dll - os=4.0 img=1.0 sys=4.0
                  "cygpcre-0.dll" v0.0 ts=2003/9/10 10:25
   15k 2003/09/10 C:\cygwin\bin\cygpcreposix-0.dll - os=4.0 img=1.0 sys=4.0
                  "cygpcreposix-0.dll" v0.0 ts=2003/9/10 10:25
    7k 2003/10/19 C:\cygwin\bin\cygcrypt-0.dll - os=4.0 img=1.0 sys=4.0
                  "cygcrypt-0.dll" v0.0 ts=2003/10/19 3:57
  842k 2003/09/30 C:\cygwin\bin\cygcrypto-0.9.7.dll - os=4.0 img=1.0 sys=4.0
                  "cygcrypto-0.9.7.dll" v0.0 ts=2003/9/30 12:49
  171k 2003/09/30 C:\cygwin\bin\cygssl-0.9.7.dll - os=4.0 img=1.0 sys=4.0
                  "cygssl-0.9.7.dll" v0.0 ts=2003/9/30 12:49
  949k 2003/09/20 C:\cygwin\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
                  "cygwin1.dll" v0.0 ts=2003/9/20 16:31
    Cygwin DLL version info:
        DLL version: 1.5.5
        DLL epoch: 19
        DLL bad signal mask: 19005
        DLL old termios: 5
        DLL malloc env: 28
        API major: 0
        API minor: 94
        Shared data: 3
        DLL identifier: cygwin1
        Mount registry: 2
        Cygnus registry name: Cygnus Solutions
        Cygwin registry name: Cygwin
        Program options name: Program Options
        Cygwin mount registry name: mounts v2
        Cygdrive flags: cygdrive flags
        Cygdrive prefix: cygdrive prefix
        Cygdrive default prefix: 
        Build date: Sat Sep 20 16:31:15 EDT 2003
        CVS tag: cr-0x9b
        Shared id: cygwin1S3


Cygwin Package Information
Last downloaded files to: C:\cygwintmp
Last downloaded files from: http://mirrors.rcn.net/pub/sourceware/cygwin

Package              Version            
_update-info-dir     00221-1            
ash                  20031007-1         
aspell               0.50.3-1           
aspell-en            0.51.0-1           
base-files           2.6-1              
base-passwd          1.1-1              
bash                 2.05b-16           
binutils             20030901-1         
bzip2                1.0.2-5            
check                0.8.4-1            
clear                1.0-1              
crypt                1.1-1              
cygutils             1.2.2-1            
cygwin               1.5.5-1            
cygwin-doc           1.3-6              
diffutils            2.8.4-1            
ed                   0.2-1              
editrights           1.01-1             
file                 4.03-2             
fileutils            4.1-2              
findutils            4.1.7-4            
gawk                 3.1.3-3            
gcc                  3.3.1-2            
gcc-mingw            20030911-3         
gdb                  20030919-1         
gdbm                 1.8.3-7            
grep                 2.5-1              
groff                1.18.1-2           
gsl                  1.4-1              
gzip                 1.3.5-1            
inetutils            1.3.2-25           
less                 381-1              
libaspell15          0.50.3-1           
libbz2_1             1.0.2-5            
libgdbm              1.8.0-5            
libgdbm-devel        1.8.3-7            
libgdbm3             1.8.3-3            
libgdbm4             1.8.3-7            
libgettextpo0        0.12.1-3           
libiconv2            1.9.1-3            
libintl1             0.10.40-1          
libintl2             0.12.1-3           
libncurses5          5.2-1              
libncurses6          5.2-8              
libncurses7          5.3-4              
libpcre              4.1-1              
libpcre0             4.4-2              
libpopt0             1.6.4-4            
libreadline4         4.1-2              
libreadline5         4.3-5              
login                1.9-7              
man                  1.5j-2             
mingw-runtime        3.2-1              
mktemp               1.5-3              
ncurses              5.3-4              
openssh              3.7.1p2-1          
openssl              0.9.7c-1           
openssl096           0.9.6j-1           
readline             4.3-5              
rxvt                 2.7.10-3           
sed                  4.0.7-3            
sh-utils             2.0.15-4           
tar                  1.13.25-3          
tcltk                20030901-1         
tcsh                 6.12.00-7          
termcap              20021106-2         
terminfo             5.3_20030726-1     
texinfo              4.2-4              
textutils            2.0.21-1           
time                 1.7-1              
units                1.77-1             
unzip                5.50-5             
vim                  6.2.098-1          
w32api               2.4-1              
wget                 1.8.2-2            
which                1.5-2              
zip                  2.3-5              
zlib                 1.1.4-4            


I hope that this can be useful.

Rodrigo Medina


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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-10-30  0:29 Rodrigo Medina
@ 2003-10-30  4:34 ` Pierre A. Humblet
  2003-10-30 12:10   ` Corinna Vinschen
  0 siblings, 1 reply; 18+ messages in thread
From: Pierre A. Humblet @ 2003-10-30  4:34 UTC (permalink / raw)
  To: Rodrigo Medina, cygwin

At 03:05 PM 10/29/2003 -0400, Rodrigo Medina wrote:
>
>Corinna wrote:
>
>>Works for me on 98.  I don't have a 95 system for testing.  Do you
>>have more than one cygwin1.dll in the path?  Please send cygcheck
>>output according to http://cygwin.com/problems.html
>
>Corinna:
>
>This is the first time that cygwin is installed in this machine. In any case
>with FIND only C:\cygwin\bin\cygwin1.dll appears.

I observed a ssh crash on Win95 too, but only after running ssh-host-config
It went away after deleting the two ssh 22/ lines in c:\windows\services
They don't seem to end with CRNL.

I am not equipped to do serious debugging on my Win95 machine, strace shows
nothing of interest, the stackdump points to cygwin_getservbyname
and dup_ent.

~: cat ssh.exe.stackdump 
Exception: STATUS_ACCESS_VIOLATION at eip=610DF651
eax=00000000 ebx=00530740 ecx=FFFFFFFF edx=00000053 esi=00000010 edi=00000053
ebp=0085F678 esp=0085F674 program=\\WORLDNET\C\SSH.EXE
cs=0137 ds=013F es=013F fs=4227 gs=0000 ss=013F
Stack trace:
Frame     Function  Args
0085F678  610DF651  (00000053, 7E2E3D84, 00000032, 00000000)
0085F6C8  61060914  (00000000, 00530732, 00000002, A2038AB0)
0085F718  6106215A  (0040B221, 0040B225, F48CC23C, C59AB5C7)
0085FBB8  0040B5EE  (616966CC, 00438FD0, 00000000, 00000002)

~: addr2line -e /bin/cygwin1.dll -f 0x610DF651
??
../../../../../../src/newlib/libc/machine/i386/strlen.S:27
~: addr2line -e /bin/cygwin1.dll -f 0x61060914
_Z7dup_entPvS_11struct_type
/eroot/obj/i586-pc-cygwin/winsup/cygwin/../../../../src/winsup/cygwin/net.cc
:387
~: addr2line -e /bin/cygwin1.dll -f 0x6106215A
cygwin_getservbyname
/eroot/obj/i586-pc-cygwin/winsup/cygwin/../../../../src/winsup/cygwin/net.cc
:954

Pierre


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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-10-30  4:34 ` Pierre A. Humblet
@ 2003-10-30 12:10   ` Corinna Vinschen
  2003-10-31  3:44     ` Pierre A. Humblet
  2003-10-31  9:17     ` Christian Weinberger
  0 siblings, 2 replies; 18+ messages in thread
From: Corinna Vinschen @ 2003-10-30 12:10 UTC (permalink / raw)
  To: cygwin

On Wed, Oct 29, 2003 at 09:46:04PM -0500, Pierre A. Humblet wrote:
> At 03:05 PM 10/29/2003 -0400, Rodrigo Medina wrote:
> >
> >Corinna wrote:
> >
> >>Works for me on 98.  I don't have a 95 system for testing.  Do you
> >>have more than one cygwin1.dll in the path?  Please send cygcheck
> >>output according to http://cygwin.com/problems.html
> >
> >Corinna:
> >
> >This is the first time that cygwin is installed in this machine. In any case
> >with FIND only C:\cygwin\bin\cygwin1.dll appears.
> 
> I observed a ssh crash on Win95 too, but only after running ssh-host-config
> It went away after deleting the two ssh 22/ lines in c:\windows\services
> They don't seem to end with CRNL.

Ouch.  I see why that happens.  I'll have to modify the ssh-host-config
script.

This is no problem on 98/Me and NT, though.  Did you also test with
ssh/22 lines with CRLF?

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-10-30 12:10   ` Corinna Vinschen
@ 2003-10-31  3:44     ` Pierre A. Humblet
  2003-10-31 13:09       ` Corinna Vinschen
  2003-10-31  9:17     ` Christian Weinberger
  1 sibling, 1 reply; 18+ messages in thread
From: Pierre A. Humblet @ 2003-10-31  3:44 UTC (permalink / raw)
  To: cygwin

At 10:52 AM 10/30/2003 +0100, Corinna Vinschen wrote:
>
>Ouch.  I see why that happens.  I'll have to modify the ssh-host-config
>script.
>
>This is no problem on 98/Me and NT, though.  Did you also test with
>ssh/22 lines with CRLF?

Yes, it works. However there must be something new in 1.5 that causes 
the lack of CR to cause a crash on Win95.

I tried your new script, and ssh did not crash. I thought that was great
until I realized that the script did not write the ssh lines in services:

*******************
Olivier@erg ~
$ fgrep ssh /cygdrive/c/windows/services

Olivier@erg ~
$ ssh-host-config
Overwrite existing /etc/ssh_config file? (yes/no) no
Overwrite existing /etc/sshd_config file? (yes/no) no
Added ssh to /cygdrive/c/WINDOWS/SERVICES

Host configuration finished. Have fun!

Olivier@erg ~
$ fgrep ssh /cygdrive/c/windows/services

Olivier@erg ~
*******************

Also on my Win98 machine I had /var/log/lastlog as a directory.
I think that's legal, at least for ssh, but 

~: ssh-host-config
Creating /var/log/lastlog failed\!

Pierre

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-10-31  3:44     ` Pierre A. Humblet
@ 2003-10-31 13:09       ` Corinna Vinschen
  2003-11-01  0:13         ` Pierre A. Humblet
  0 siblings, 1 reply; 18+ messages in thread
From: Corinna Vinschen @ 2003-10-31 13:09 UTC (permalink / raw)
  To: cygwin

On Thu, Oct 30, 2003 at 08:25:58PM -0500, Pierre A. Humblet wrote:
> At 10:52 AM 10/30/2003 +0100, Corinna Vinschen wrote:
> >
> >Ouch.  I see why that happens.  I'll have to modify the ssh-host-config
> >script.
> >
> >This is no problem on 98/Me and NT, though.  Did you also test with
> >ssh/22 lines with CRLF?
> 
> Yes, it works. However there must be something new in 1.5 that causes 
> the lack of CR to cause a crash on Win95.

Whatever, I can't test it.

> I tried your new script, and ssh did not crash. I thought that was great
> until I realized that the script did not write the ssh lines in services:
> 
> *******************
> Olivier@erg ~
> $ fgrep ssh /cygdrive/c/windows/services
> 
> Olivier@erg ~
> $ ssh-host-config
> Overwrite existing /etc/ssh_config file? (yes/no) no
> Overwrite existing /etc/sshd_config file? (yes/no) no
> Added ssh to /cygdrive/c/WINDOWS/SERVICES
> 
> Host configuration finished. Have fun!
> 
> Olivier@erg ~
> $ fgrep ssh /cygdrive/c/windows/services
> 

I've just again tested it on 98 and it works fine.  Could you please
figure out what happens on your machine?

> Olivier@erg ~
> *******************
> 
> Also on my Win98 machine I had /var/log/lastlog as a directory.
> I think that's legal, at least for ssh, but 
> 
> ~: ssh-host-config
> Creating /var/log/lastlog failed\!

Fixed.  See the other thread "Testers for ..."

Corinna

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-10-31 13:09       ` Corinna Vinschen
@ 2003-11-01  0:13         ` Pierre A. Humblet
  2003-11-01 12:27           ` Corinna Vinschen
  0 siblings, 1 reply; 18+ messages in thread
From: Pierre A. Humblet @ 2003-11-01  0:13 UTC (permalink / raw)
  To: cygwin

At 11:52 AM 10/31/2003 +0100, Corinna Vinschen wrote:
>I've just again tested it on 98 and it works fine.  Could you please
>figure out what happens on your machine?

2 things:
- I had accidentally deleted the next (23) line in services, so awk 
  didn't find the pattern.
- ssh crashes even with the CR. I also had to shorten the line. It works
  with 18 spaces between {tcp,udp} and the #
Please send the next version, just to be sure.

Pierre


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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-01  0:13         ` Pierre A. Humblet
@ 2003-11-01 12:27           ` Corinna Vinschen
  2003-11-02  4:28             ` Pierre A. Humblet
  2003-11-02 14:58             ` Pierre A. Humblet
  0 siblings, 2 replies; 18+ messages in thread
From: Corinna Vinschen @ 2003-11-01 12:27 UTC (permalink / raw)
  To: cygwin

[-- Attachment #1: Type: text/plain, Size: 1370 bytes --]

On Fri, Oct 31, 2003 at 07:05:41PM -0500, Pierre A. Humblet wrote:
> At 11:52 AM 10/31/2003 +0100, Corinna Vinschen wrote:
> >I've just again tested it on 98 and it works fine.  Could you please
> >figure out what happens on your machine?
> 
> 2 things:
> - I had accidentally deleted the next (23) line in services, so awk 
>   didn't find the pattern.

Ok, so how do you suggest to react in the script if that happens?
Should the script just emit a warning or should it append the ssh lines
at the end of the services file?  The new script will just emit a
warning for now.

> - ssh crashes even with the CR. I also had to shorten the line. It works
>   with 18 spaces between {tcp,udp} and the #

Ouch.  How many spaces do I emit currently... hmm, 27.  This matches
the file layout on NT.  A quick look on a 98 machine... yes, only
18 spaces.  Oh boy...

> Please send the next version, just to be sure.

I've created a new script and attached it to this mail.

Changes:

- Emit a warning if ssh couldn't be added to services file.
- Accomodate different service file layout on 9x and NT.
- On NT: Only ask for installing sshd as service if it's not
  already installed.

Please give it a try,
Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

[-- Attachment #2: ssh-host-config --]
[-- Type: text/plain, Size: 11653 bytes --]

#!/bin/sh
#
# ssh-host-config, Copyright 2000, 2001, 2002, 2003 Red Hat Inc.
#
# This file is part of the Cygwin port of OpenSSH.

# Subdirectory where the new package is being installed
PREFIX=/usr

# Directory where the config files are stored
SYSCONFDIR=/etc
LOCALSTATEDIR=/var

progname=$0
auto_answer=""
port_number=22

privsep_configured=no
privsep_used=yes
sshd_in_passwd=no
sshd_in_sam=no

request()
{
  if [ "${auto_answer}" = "yes" ]
  then
    return 0
  elif [ "${auto_answer}" = "no" ]
  then
    return 1
  fi

  answer=""
  while [ "X${answer}" != "Xyes" -a "X${answer}" != "Xno" ]
  do
    echo -n "$1 (yes/no) "
    read answer
  done
  if [ "X${answer}" = "Xyes" ]
  then
    return 0
  else
    return 1
  fi
}

# Check options

while :
do
  case $# in
  0)
    break
    ;;
  esac

  option=$1
  shift

  case "$option" in
  -d | --debug )
    set -x
    ;;

  -y | --yes )
    auto_answer=yes
    ;;

  -n | --no )
    auto_answer=no
    ;;

  -p | --port )
    port_number=$1
    shift
    ;;

  *)
    echo "usage: ${progname} [OPTION]..."
    echo
    echo "This script creates an OpenSSH host configuration."
    echo
    echo "Options:"
    echo "    --debug  -d     Enable shell's debug output."
    echo "    --yes    -y     Answer all questions with \"yes\" automatically."
    echo "    --no     -n     Answer all questions with \"no\" automatically."
    echo "    --port   -p <n> sshd listens on port n."
    echo
    exit 1
    ;;

  esac
done

# Check if running on NT
_sys="`uname -a`"
_nt=`expr "$_sys" : "CYGWIN_NT"`

# Check for running ssh/sshd processes first. Refuse to do anything while
# some ssh processes are still running

if ps -ef | grep -v grep | grep -q ssh
then
  echo
  echo "There are still ssh processes running. Please shut them down first."
  echo
  exit 1
fi

# Check for ${SYSCONFDIR} directory

if [ -e "${SYSCONFDIR}" -a ! -d "${SYSCONFDIR}" ]
then
  echo
  echo "${SYSCONFDIR} is existant but not a directory."
  echo "Cannot create global configuration files."
  echo
  exit 1
fi

# Create it if necessary

if [ ! -e "${SYSCONFDIR}" ]
then
  mkdir "${SYSCONFDIR}"
  if [ ! -e "${SYSCONFDIR}" ]
  then
    echo
    echo "Creating ${SYSCONFDIR} directory failed"
    echo
    exit 1
  fi
fi

# Create /var/log and /var/log/lastlog if not already existing

if [ -f ${LOCALSTATEDIR}/log ]
then
  echo "Creating ${LOCALSTATEDIR}/log failed!"
else
  if [ ! -d ${LOCALSTATEDIR}/log ]
  then
    mkdir -p ${LOCALSTATEDIR}/log
  fi
  if [ -d ${LOCALSTATEDIR}/log/lastlog ]
  then
    chmod 777 ${LOCALSTATEDIR}/log/lastlog
  elif [ ! -f ${LOCALSTATEDIR}/log/lastlog ]
  then
    cat /dev/null > ${LOCALSTATEDIR}/log/lastlog
    chmod 666 ${LOCALSTATEDIR}/log/lastlog
  fi
fi

# Create /var/empty file used as chroot jail for privilege separation
if [ -f ${LOCALSTATEDIR}/empty ]
then
  echo "Creating ${LOCALSTATEDIR}/empty failed!"
else
  mkdir -p ${LOCALSTATEDIR}/empty
  if [ $_nt -gt 0 ]
  then
    chmod 755 ${LOCALSTATEDIR}/empty
  fi
fi

# First generate host keys if not already existing

if [ ! -f "${SYSCONFDIR}/ssh_host_key" ]
then
  echo "Generating ${SYSCONFDIR}/ssh_host_key"
  ssh-keygen -t rsa1 -f ${SYSCONFDIR}/ssh_host_key -N '' > /dev/null
fi

if [ ! -f "${SYSCONFDIR}/ssh_host_rsa_key" ]
then
  echo "Generating ${SYSCONFDIR}/ssh_host_rsa_key"
  ssh-keygen -t rsa -f ${SYSCONFDIR}/ssh_host_rsa_key -N '' > /dev/null
fi

if [ ! -f "${SYSCONFDIR}/ssh_host_dsa_key" ]
then
  echo "Generating ${SYSCONFDIR}/ssh_host_dsa_key"
  ssh-keygen -t dsa -f ${SYSCONFDIR}/ssh_host_dsa_key -N '' > /dev/null
fi

# Check if ssh_config exists. If yes, ask for overwriting

if [ -f "${SYSCONFDIR}/ssh_config" ]
then
  if request "Overwrite existing ${SYSCONFDIR}/ssh_config file?"
  then
    rm -f "${SYSCONFDIR}/ssh_config"
    if [ -f "${SYSCONFDIR}/ssh_config" ]
    then
      echo "Can't overwrite. ${SYSCONFDIR}/ssh_config is write protected."
    fi
  fi
fi

# Create default ssh_config from skeleton file in /etc/defaults/etc

if [ ! -f "${SYSCONFDIR}/ssh_config" ]
then
  echo "Generating ${SYSCONFDIR}/ssh_config file"
  cp ${SYSCONFDIR}/defaults/etc/ssh_config ${SYSCONFDIR}/ssh_config
  if [ "$port_number" != "22" ]
  then
    echo "Host localhost" >> ${SYSCONFDIR}/ssh_config
    echo "    Port $port_number" >> ${SYSCONFDIR}/ssh_config
  fi
fi

# Check if sshd_config exists. If yes, ask for overwriting

if [ -f "${SYSCONFDIR}/sshd_config" ]
then
  if request "Overwrite existing ${SYSCONFDIR}/sshd_config file?"
  then
    rm -f "${SYSCONFDIR}/sshd_config"
    if [ -f "${SYSCONFDIR}/sshd_config" ]
    then
      echo "Can't overwrite. ${SYSCONFDIR}/sshd_config is write protected."
    fi
  else
    grep -q UsePrivilegeSeparation ${SYSCONFDIR}/sshd_config && privsep_configured=yes
  fi
fi

# Prior to creating or modifying sshd_config, care for privilege separation

if [ "$privsep_configured" != "yes" ]
then
  if [ $_nt -gt 0 ]
  then
    echo "Privilege separation is set to yes by default since OpenSSH 3.3."
    echo "However, this requires a non-privileged account called 'sshd'."
    echo "For more info on privilege separation read /usr/doc/openssh/README.privsep."
    echo
    if request "Shall privilege separation be used?"
    then
      privsep_used=yes
      grep -q '^sshd:' ${SYSCONFDIR}/passwd && sshd_in_passwd=yes
      net user sshd >/dev/null 2>&1 && sshd_in_sam=yes
      if [ "$sshd_in_passwd" != "yes" ]
      then
        if [ "$sshd_in_sam" != "yes" ]
	then
	  echo "Warning: The following function requires administrator privileges!"
	  if request "Shall this script create a local user 'sshd' on this machine?"
	  then
	    dos_var_empty=`cygpath -w ${LOCALSTATEDIR}/empty`
	    net user sshd /add /fullname:"sshd privsep" "/homedir:$dos_var_empty" /active:no > /dev/null 2>&1 && sshd_in_sam=yes
	    if [ "$sshd_in_sam" != "yes" ]
	    then
	      echo "Warning: Creating the user 'sshd' failed!"
	    fi
	  fi
	fi
	if [ "$sshd_in_sam" != "yes" ]
	then
	  echo "Warning: Can't create user 'sshd' in ${SYSCONFDIR}/passwd!"
	  echo "         Privilege separation set to 'no' again!"
	  echo "         Check your ${SYSCONFDIR}/sshd_config file!"
	  privsep_used=no
	else
	  mkpasswd -l -u sshd | sed -e 's/bash$/false/' >> ${SYSCONFDIR}/passwd
	fi
      fi
    else
      privsep_used=no
    fi
  else
    # On 9x don't use privilege separation.  Since security isn't
    # available it just adds useless additional processes.
    privsep_used=no
  fi
fi

# Create default sshd_config from skeleton files in /etc/defaults/etc or
# modify to add the missing privsep configuration option

if [ ! -f "${SYSCONFDIR}/sshd_config" ]
then
  echo "Generating ${SYSCONFDIR}/sshd_config file"
  sed -e "s/^#UsePrivilegeSeparation yes/UsePrivilegeSeparation $privsep_used/
	  s/^#Port 22/Port $port_number/
	  s/^#StrictModes yes/StrictModes no/" \
      < ${SYSCONFDIR}/defaults/etc/sshd_config \
      > ${SYSCONFDIR}/sshd_config
elif [ "$privsep_configured" != "yes" ]
then
  echo >> ${SYSCONFDIR}/sshd_config
  echo "UsePrivilegeSeparation $privsep_used" >> ${SYSCONFDIR}/sshd_config
fi

# Care for services file
_my_etcdir="/ssh-host-config.$$"
if [ $_nt -gt 0 ]
then
  _win_etcdir="${SYSTEMROOT}\\system32\\drivers\\etc"
  _services="${_my_etcdir}/services"
  # On NT, 27 spaces, no space after the hash
  _spaces="                           #"
else
  _win_etcdir="${WINDIR}"
  _services="${_my_etcdir}/SERVICES"
  # On 9x, 18 spaces (95 is very touchy), a space after the hash
  _spaces="                  # "
fi
_serv_tmp="${_my_etcdir}/srv.out.$$"

mount -t -f "${_win_etcdir}" "${_my_etcdir}"

# Depends on the above mount
_wservices=`cygpath -w "${_services}"`

# Remove sshd 22/port from services
if [ `grep -q 'sshd[ \t][ \t]*22' "${_services}"; echo $?` -eq 0 ]
then
  grep -v 'sshd[ \t][ \t]*22' "${_services}" > "${_serv_tmp}"
  if [ -f "${_serv_tmp}" ]
  then 
    if mv "${_serv_tmp}" "${_services}"
    then
      echo "Removing sshd from ${_wservices}"
    else
      echo "Removing sshd from ${_wservices} failed!"
    fi 
    rm -f "${_serv_tmp}"
  else
    echo "Removing sshd from ${_wservices} failed!"
  fi
fi

# Add ssh 22/tcp  and ssh 22/udp to services
if [ `grep -q 'ssh[ \t][ \t]*22' "${_services}"; echo $?` -ne 0 ]
then
  if awk '{ if ( $2 ~ /^23\/tcp/ ) print "ssh                22/tcp'"${_spaces}"'SSH Remote Login Protocol\nssh                22/udp'"${_spaces}"'SSH Remote Login Protocol"; print $0; }' < "${_services}" > "${_serv_tmp}"
  then
    if mv "${_serv_tmp}" "${_services}"
    then
      echo "Added ssh to ${_wservices}"
    else
      echo "Adding ssh to ${_wservices} failed!"
    fi
    rm -f "${_serv_tmp}"
  else
    echo "WARNING: Adding ssh to ${_wservices} failed!"
  fi
fi

umount "${_my_etcdir}"

# Care for inetd.conf file
_inetcnf="${SYSCONFDIR}/inetd.conf"
_inetcnf_tmp="${SYSCONFDIR}/inetd.conf.$$"

if [ -f "${_inetcnf}" ]
then
  # Check if ssh service is already in use as sshd
  with_comment=1
  grep -q '^[ \t]*sshd' "${_inetcnf}" && with_comment=0
  # Remove sshd line from inetd.conf
  if [ `grep -q '^[# \t]*sshd' "${_inetcnf}"; echo $?` -eq 0 ]
  then
    grep -v '^[# \t]*sshd' "${_inetcnf}" >> "${_inetcnf_tmp}"
    if [ -f "${_inetcnf_tmp}" ]
    then
      if mv "${_inetcnf_tmp}" "${_inetcnf}"
      then
        echo "Removed sshd from ${_inetcnf}"
      else
        echo "Removing sshd from ${_inetcnf} failed!"
      fi
      rm -f "${_inetcnf_tmp}"
    else
      echo "Removing sshd from ${_inetcnf} failed!"
    fi
  fi

  # Add ssh line to inetd.conf
  if [ `grep -q '^[# \t]*ssh' "${_inetcnf}"; echo $?` -ne 0 ]
  then
    if [ "${with_comment}" -eq 0 ]
    then
      echo 'ssh  stream  tcp     nowait  root    /usr/sbin/sshd sshd -i' >> "${_inetcnf}"
    else
      echo '# ssh  stream  tcp     nowait  root    /usr/sbin/sshd sshd -i' >> "${_inetcnf}"
    fi
    echo "Added ssh to ${_inetcnf}"
  fi
fi

# On NT ask if sshd should be installed as service
if [ $_nt -gt 0 ]
then
  # But only if it is not already installed
  if ! cygrunsrv -Q sshd > /dev/null 2>&1
  then
    echo
    echo "Do you want to install sshd as service?"
    if request "(Say \"no\" if it's already installed as service)"
    then
      echo
      echo "Which value should the environment variable CYGWIN have when"
      echo "sshd starts? It's recommended to set at least \"ntsec\" to be"
      echo "able to change user context without password."
      echo -n "Default is \"ntsec\".  CYGWIN="
      read _cygwin
      [ -z "${_cygwin}" ] && _cygwin="ntsec"
      if cygrunsrv -I sshd -d "CYGWIN sshd" -p /usr/sbin/sshd -a -D -e "CYGWIN=${_cygwin}"
      then
	echo
	echo "The service has been installed under LocalSystem account."
      fi
    fi
    # Now check if sshd has been successfully installed.  This allows to
    # set the ownership of the affected files correctly.
    #
    # NOTE: This doesn't work flawlessly so far on Windows 2003 Server.
    # The SYSTEM account on 2003 has not the appropriate privileges to allow 
    # passwordless logon (pubkey authentication).  This requires to run the
    # service under a special account, which has administrator privileges
    # plus (at least, AFAIK) the SeCreateTokenPrivilege.
    # The next step will be, to extend this script to create an approriate
    # account for that, using the new editrights tool.
    if cygrunsrv -Q sshd > /dev/null 2>&1
    then
      chown system ${SYSCONFDIR}/ssh*
      chown system.system ${LOCALSTATEDIR}/empty
      if [ -f ${LOCALSTATEDIR}/log/sshd.log ]
      then
	chown system.system ${LOCALSTATEDIR}/log/sshd.log
      fi
    fi
  fi
fi

echo
echo "Host configuration finished. Have fun!"


[-- Attachment #3: Type: text/plain, Size: 218 bytes --]

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-01 12:27           ` Corinna Vinschen
@ 2003-11-02  4:28             ` Pierre A. Humblet
  2003-11-02 14:58             ` Pierre A. Humblet
  1 sibling, 0 replies; 18+ messages in thread
From: Pierre A. Humblet @ 2003-11-02  4:28 UTC (permalink / raw)
  To: cygwin

[-- Attachment #1: Type: text/plain, Size: 2268 bytes --]

At 01:27 PM 11/1/2003 +0100, you wrote:
>On Fri, Oct 31, 2003 at 07:05:41PM -0500, Pierre A. Humblet wrote:
>> At 11:52 AM 10/31/2003 +0100, Corinna Vinschen wrote:
>> >I've just again tested it on 98 and it works fine.  Could you please
>> >figure out what happens on your machine?
>> 
>> 2 things:
>> - I had accidentally deleted the next (23) line in services, so awk 
>>   didn't find the pattern.
>
>Ok, so how do you suggest to react in the script if that happens?
>Should the script just emit a warning or should it append the ssh lines
>at the end of the services file?  The new script will just emit a
>warning for now.

Both solutions are fine with me. 
 
>> - ssh crashes even with the CR. I also had to shorten the line. It works
>>   with 18 spaces between {tcp,udp} and the #
>
>Ouch.  How many spaces do I emit currently... hmm, 27.  This matches
>the file layout on NT.  A quick look on a 98 machine... yes, only
>18 spaces.  Oh boy...
>
>> Please send the next version, just to be sure.
>
>I've created a new script and attached it to this mail.

I have just spent a few hours on this :(

What I wrote initially is correct: ssh doesn't crash when the ssh
lines are removed from the services file.

But neither having a CR nor shortening the line have much 
to do with the problem. 
The only reason they made a difference is that I had the services
file opened in Word. In that case the getservbyname call fails
cleanly and ssh uses the default.

The real problem is that the s_proto pointer of the struct servent
returned by the Windows getservbyname on Win95 is invalid. 
That didn't matter before dup_ent was introduced.
The problem concerns all services, not only ssh, and also
affects getservbyport.

Olivier@erg ~
$ gcc getserv.c -mno-cygwin -lwsock32

Olivier@erg ~
$ ./a 25
ptr = 410732
name 4107cc smtp
aliases:
0, 4107e9 mail
port 25
Checking validy of ptr->s_proto 7e90041

(IsBadStringPtr returns true)

On Win98 one gets
~: ./a 25
ptr = 861400
name 86141d smtp
aliases:
0, 861418 mail
port 25
Checking validy of ptr->s_proto 861422
proto tcp

I attach the getserv.c program, in case others want to experiment.
A solution would be to use IsBadStringPtr (or wincap) in dup_ent.
A workaround is to delete lines in the services file.

Pierre


[-- Attachment #2: getserv.c --]
[-- Type: text/plain, Size: 1246 bytes --]

/*  gcc getserv.c -lwsock32 -mno-cygwin */
#define __USE_W32_SOCKETS

#include <windows.h>
#include <stdio.h>
#if defined(__CYGWIN__) && !defined(__USE_W32_SOCKETS)
#include <netdb.h>
#endif

main(int argc, char * argv[] )
{
  struct servent * ptr;
  int i;

#ifdef __USE_W32_SOCKETS
  WORD wVersionRequested;
  WSADATA wsaData;
  int err;

  wVersionRequested = MAKEWORD( 2, 2 );

  err = WSAStartup( wVersionRequested, &wsaData );
  if ( err != 0 ) {
    printf("Cannot initialize\n");
    return;
  }
#endif

  if (argc < 2) {
    printf("Need argument\n");
    exit(1);
  }
  if (!isdigit(*argv[1]))
    ptr = getservbyname (argv[1], "tcp");
  else
    ptr = getservbyport (ntohs (atoi (argv[1])), "tcp");
  printf("ptr = %x\n", ptr);

  if (ptr)
  {
    printf("name %x %s\n", ptr->s_name, ptr->s_name? ptr->s_name : "NULL");
    printf("aliases:\n");
    for (i = 0; ptr->s_aliases[i]; i++)
      printf("%d, %x %s\n", i, ptr->s_aliases[i], ptr->s_aliases[i]);
    printf("port %d\n", (int) ntohs(ptr->s_port));
    printf("Checking validy of ptr->s_proto %x\n", ptr->s_proto);
    if (!IsBadStringPtr (ptr->s_proto, 10))
      printf("proto %s\n", ptr->s_proto);

   }
  exit (0);
}



[-- Attachment #3: Type: text/plain, Size: 218 bytes --]

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-01 12:27           ` Corinna Vinschen
  2003-11-02  4:28             ` Pierre A. Humblet
@ 2003-11-02 14:58             ` Pierre A. Humblet
  2003-11-03 16:31               ` Corinna Vinschen
  1 sibling, 1 reply; 18+ messages in thread
From: Pierre A. Humblet @ 2003-11-02 14:58 UTC (permalink / raw)
  To: cygwin

Pierre A. Humblet wrote:

> The real problem is that the s_proto pointer of the struct servent
> returned by the Windows getservbyname on Win95 is invalid. 

Looking at net.cc, this problem seems to be well known.
However the workaround is only applied when copying the string,
not when computing its length.

Pierre


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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-02 14:58             ` Pierre A. Humblet
@ 2003-11-03 16:31               ` Corinna Vinschen
  2003-11-03 18:17                 ` Pierre A. Humblet
  0 siblings, 1 reply; 18+ messages in thread
From: Corinna Vinschen @ 2003-11-03 16:31 UTC (permalink / raw)
  To: cygwin

On Sun, Nov 02, 2003 at 09:43:14AM -0500, Pierre A. Humblet wrote:
> Pierre A. Humblet wrote:
> 
> > The real problem is that the s_proto pointer of the struct servent
> > returned by the Windows getservbyname on Win95 is invalid. 
> 
> Looking at net.cc, this problem seems to be well known.
> However the workaround is only applied when copying the string,
> not when computing its length.

I see.  I'll create a patch.

Thanks for the hint,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-03 16:31               ` Corinna Vinschen
@ 2003-11-03 18:17                 ` Pierre A. Humblet
  2003-11-03 19:06                   ` Corinna Vinschen
  0 siblings, 1 reply; 18+ messages in thread
From: Pierre A. Humblet @ 2003-11-03 18:17 UTC (permalink / raw)
  To: cygwin

On Mon, Nov 03, 2003 at 05:31:15PM +0100, Corinna Vinschen wrote:
> On Sun, Nov 02, 2003 at 09:43:14AM -0500, Pierre A. Humblet wrote:
> > Pierre A. Humblet wrote:
> > 
> > > The real problem is that the s_proto pointer of the struct servent
> > > returned by the Windows getservbyname on Win95 is invalid. 
> > 
> > Looking at net.cc, this problem seems to be well known.
> > However the workaround is only applied when copying the string,
> > not when computing its length.
> 
> I see.  I'll create a patch.
 
I started one already, must still compile and test.
Let me know if you proceed on your side.

Pierre

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-03 18:17                 ` Pierre A. Humblet
@ 2003-11-03 19:06                   ` Corinna Vinschen
  2003-11-04  3:09                     ` Pierre A. Humblet
  0 siblings, 1 reply; 18+ messages in thread
From: Corinna Vinschen @ 2003-11-03 19:06 UTC (permalink / raw)
  To: cygwin

On Mon, Nov 03, 2003 at 01:39:56PM -0500, Pierre A. Humblet wrote:
> On Mon, Nov 03, 2003 at 05:31:15PM +0100, Corinna Vinschen wrote:
> > On Sun, Nov 02, 2003 at 09:43:14AM -0500, Pierre A. Humblet wrote:
> > > Pierre A. Humblet wrote:
> > > 
> > > > The real problem is that the s_proto pointer of the struct servent
> > > > returned by the Windows getservbyname on Win95 is invalid. 
> > > 
> > > Looking at net.cc, this problem seems to be well known.
> > > However the workaround is only applied when copying the string,
> > > not when computing its length.
> > 
> > I see.  I'll create a patch.
>  
> I started one already, must still compile and test.
> Let me know if you proceed on your side.

I have a patch ready and it seems to work fine(tm).  Would you mind
to give it a try on 95?  Patch below.

Corinna

Index: net.cc
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/net.cc,v
retrieving revision 1.154
diff -u -p -r1.154 net.cc
--- net.cc	25 Sep 2003 00:37:17 -0000	1.154
+++ net.cc	3 Nov 2003 19:06:12 -0000
@@ -499,8 +499,21 @@ dup_ent (void *old, void *src0, struct_t
   /* Do servent/hostent specific processing */
   int protolen = 0;
   int addr_list_len = 0;
+  char *s_proto = NULL;
   if (type == is_servent)
-    sz += (protolen = strlen_round (src->s_proto));
+    {
+      if (src->s_proto)
+	{
+	  /* Windows 95 idiocy.  Structure is misaligned on Windows 95.
+	     Kludge around this by trying a different pointer alignment.  */
+	  if (IsBadReadPtr (src->s_proto, sizeof (src->s_proto))
+	      && !IsBadReadPtr (((pservent *) src)->s_proto, sizeof (src->s_proto)))
+	    s_proto = ((pservent *) src)->s_proto;
+	  else
+	    s_proto = src->s_proto;
+	}
+      sz += (protolen = strlen_round (s_proto));
+    }
   else if (type == is_hostent)
     {
       /* Calculate the length and storage used for h_addr_list */
@@ -549,16 +562,8 @@ dup_ent (void *old, void *src0, struct_t
       /* Do servent/hostent specific processing. */
       if (type == is_servent)
 	{
-	  if (src->s_proto)
+	  if (s_proto)
 	    {
-	      char *s_proto;
-	      /* Windows 95 idiocy.  Structure is misaligned on Windows 95.
-		 Kludge around this by trying a different pointer alignment.  */
-	      if (IsBadReadPtr (src->s_proto, sizeof (src->s_proto))
-		  && !IsBadReadPtr (((pservent *) src)->s_proto, sizeof (src->s_proto)))
-		s_proto = ((pservent *) src)->s_proto;
-	      else
-		s_proto = src->s_proto;
 	      strcpy (dst->s_proto = dp, s_proto);
 	      dp += protolen;
 	    }


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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-03 19:06                   ` Corinna Vinschen
@ 2003-11-04  3:09                     ` Pierre A. Humblet
  2003-11-04 12:57                       ` Christopher Faylor
  0 siblings, 1 reply; 18+ messages in thread
From: Pierre A. Humblet @ 2003-11-04  3:09 UTC (permalink / raw)
  To: cygwin

At 08:06 PM 11/3/2003 +0100, Corinna Vinschen wrote:
>On Mon, Nov 03, 2003 at 01:39:56PM -0500, Pierre A. Humblet wrote:
>> On Mon, Nov 03, 2003 at 05:31:15PM +0100, Corinna Vinschen wrote:
>> >
>> > I see.  I'll create a patch.
>>  
>> I started one already, must still compile and test.
>> Let me know if you proceed on your side.
>
>I have a patch ready and it seems to work fine(tm).  Would you mind
>to give it a try on 95?  Patch below.

Turns out your patch is identical to mine (there is no need to 
initialize protolen), and it worked on Win95, but a few things 
trouble me in the reused code:

1) The test "IsBadReadPtr (src->s_proto ..." will unduly fail on Win95
   if the 16 lsb of the first alias address are the 16 msb of a readable
   memory address. I don't see why that's impossible. If would safer 
   to have a wincap entry, or (horror !), testing wincap.osname ().
2) The test "&& !IsBadReadPtr (((pservent *) src) " should never fail
   when it is reached, but should it fail, s_proto would be assigned an
   invalid address and the program would crash. So if that test is kept
   it should be part of a if .. else if ..  (leaving s_proto NULL).
3) Strictly speaking, we should use IsBadStringPtr..

Pierre

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-11-04  3:09                     ` Pierre A. Humblet
@ 2003-11-04 12:57                       ` Christopher Faylor
  0 siblings, 0 replies; 18+ messages in thread
From: Christopher Faylor @ 2003-11-04 12:57 UTC (permalink / raw)
  To: cygwin

On Mon, Nov 03, 2003 at 09:19:59PM -0500, Pierre A. Humblet wrote:
>At 08:06 PM 11/3/2003 +0100, Corinna Vinschen wrote:
>>On Mon, Nov 03, 2003 at 01:39:56PM -0500, Pierre A. Humblet wrote:
>>> On Mon, Nov 03, 2003 at 05:31:15PM +0100, Corinna Vinschen wrote:
>>> >
>>> > I see.  I'll create a patch.
>>>  
>>> I started one already, must still compile and test.
>>> Let me know if you proceed on your side.
>>
>>I have a patch ready and it seems to work fine(tm).  Would you mind
>>to give it a try on 95?  Patch below.
>
>Turns out your patch is identical to mine (there is no need to 
>initialize protolen), and it worked on Win95, but a few things 
>trouble me in the reused code:
>
>1) The test "IsBadReadPtr (src->s_proto ..." will unduly fail on Win95
>   if the 16 lsb of the first alias address are the 16 msb of a readable
>   memory address. I don't see why that's impossible. If would safer 
>   to have a wincap entry, or (horror !), testing wincap.osname ().

In my testing, I never saw that, and we've never gotten a bug report to
that effect, IIRC.  I thought that the double check of this pointer made
it pretty safe.

>2) The test "&& !IsBadReadPtr (((pservent *) src) " should never fail
>   when it is reached, but should it fail, s_proto would be assigned an
>   invalid address and the program would crash. So if that test is kept
>   it should be part of a if .. else if ..  (leaving s_proto NULL).
>3) Strictly speaking, we should use IsBadStringPtr..

Yes, and strictly speaking, we should be checking all of the fields in
this structure.

I'll check in an "IsStringPtr" patch.

cgf

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95
  2003-10-30 12:10   ` Corinna Vinschen
  2003-10-31  3:44     ` Pierre A. Humblet
@ 2003-10-31  9:17     ` Christian Weinberger
  1 sibling, 0 replies; 18+ messages in thread
From: Christian Weinberger @ 2003-10-31  9:17 UTC (permalink / raw)
  To: cygwin

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1114 bytes --]

Corinna Vinschen <corinna-cygwin@cygwin.com> wrote in
news:20031030095229.GM1653@cygbert.vinschen.de: 

>> 
>> I observed a ssh crash on Win95 too, but only after running
>> ssh-host-config It went away after deleting the two ssh 22/ lines in
>> c:\windows\services They don't seem to end with CRNL.
> 
> Ouch.  I see why that happens.  I'll have to modify the
> ssh-host-config script.
> 
> This is no problem on 98/Me and NT, though.  Did you also test with
> ssh/22 lines with CRLF?
> 
> Corinna
> 

It seems to me that the missing CRLF is not the only source of the problem.
I receive a similar stackdump on XP Home, but only when I use the user 
under which sshd has been installed.

When I use root, ssh works fine.
I´ll go deeper into the differences, but up till now it seem that the ssh 
configuration scripts do not make up the difference.

I´ll come back to you later.

Christian


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^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2003-11-04 12:57 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-10-28 20:57 Segmentation Fault of ssh3.7.1 with cygwin1.5.5-1 in W95 Rodrigo Medina
2003-10-29  9:40 ` Corinna Vinschen
2003-10-31 21:40 ` Christian Weinberger
2003-10-30  0:29 Rodrigo Medina
2003-10-30  4:34 ` Pierre A. Humblet
2003-10-30 12:10   ` Corinna Vinschen
2003-10-31  3:44     ` Pierre A. Humblet
2003-10-31 13:09       ` Corinna Vinschen
2003-11-01  0:13         ` Pierre A. Humblet
2003-11-01 12:27           ` Corinna Vinschen
2003-11-02  4:28             ` Pierre A. Humblet
2003-11-02 14:58             ` Pierre A. Humblet
2003-11-03 16:31               ` Corinna Vinschen
2003-11-03 18:17                 ` Pierre A. Humblet
2003-11-03 19:06                   ` Corinna Vinschen
2003-11-04  3:09                     ` Pierre A. Humblet
2003-11-04 12:57                       ` Christopher Faylor
2003-10-31  9:17     ` Christian Weinberger

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