Bug#98071: marked as done (symlink to itself hangs)

[Debian Bug Tracking System]

Your message dated Thu, 2 Aug 2001 18:49:30 +0200
with message-id <20010802184930.D895@212.23.136.22>
and subject line old bug closed
has caused the attached Bug report to be marked as done.

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If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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--------------------------------------
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Date: Sun, 20 May 2001 02:36:04 +0200
From: Marcus Brinkmann <marcus.brinkmann@ruhr-uni-bochum.de>
To: submit@bugs.debian.org
Subject: symlink to itself hangs
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Package: hurd

Hi,

the following doesn't return:

$ cd /tmp
$ ln -s /tmp/x x
$ ls x

The variant "ln -s x x" does not show such errornous behaviour.
Filesystem is ext2fs. It is sufficient to do "ls".

Here is a backtrace:

Script started on Sun May 20 02:23:35 2001
marcus@ulysses:/tmp$ gdb /b=08 =08bin/ls 17841=0D
GNU gdb 5.0=0D
Copyright 2000 Free Software Foundation, Inc.=0D
GDB is free software, covered by the GNU General Public License, and you ar=
e=0D
welcome to change it and/or distribute copies of it under certain condition=
s.=0D
Type "show copying" to see the conditions.=0D
There is absolutely no warranty for GDB.  Type "show warranty" for details.=
=0D
This GDB was configured as "i386-unknown-gnu0.2"...=0D
(no debugging symbols found)...=0D
/tmp/17841: No such file or directory.=0D
Attaching to program `/bin/ls', pid 17841=0D
Reading symbols from /lib/debug/libc.so.0.2...done.=0D
Loaded symbols for /lib/debug/libc.so.0.2=0D
Reading symbols from /lib/ld.so...done.=0D
Loaded symbols for /lib/ld.so=0D
Reading symbols from /lib/debug/libmachuser.so.1...done.=0D
Loaded symbols for /lib/debug/libmachuser.so.1=0D
Reading symbols from /lib/debug/libhurduser.so.0.0...done.=0D
Loaded symbols for /lib/debug/libhurduser.so.0.0=0D
[Switching to thread 17841.1]=0D
(gdb) bt full=0D
#0  0x105af11 in _hurd_intr_rpc_msg_in_trap () at intr-msg.c:118=0D
        err =3D 0=0D
        ss =3D (struct hurd_sigstate *) 0x11aa808=0D
        user_option =3D 3=0D
        user_timeout =3D 0=0D
        m =3D (union msg *) 0x1020c28=0D
        msgh_bits =3D 5395=0D
        remote_port =3D 22=0D
        msgid =3D 20018=0D
        save_data =3D {i =3D {335546380, 795897204}}=0D
#1  0x119bfbb in __dir_lookup (start_dir=3D22, file_name=3D0x102165d "tmp/x=
", =0D
    flags=3D0, mode=3D0, do_retry=3D0x1021610, retry_name=3D0x102165c "/tmp=
/x", =0D
    result=3D0x1021a98)=0D
    at /mnt/marcus/gnu/hurd/glibc/glibc-2.2.2/i386-gnu/obj/hurd/RPC_dir_loo=
kup.c:183=0D
        flags =3D 0=0D
        do_retry =3D (retry_type *) 0x11aa808=0D
        result =3D (mach_port_t *) 0x0=0D
        Mess =3D {In =3D {Head =3D {msgh_bits =3D 2147488256, msgh_size =3D=
 1076, =0D
      msgh_remote_port =3D 0, msgh_local_port =3D 43, msgh_seqno =3D 241946=
, =0D
      msgh_id =3D 20118}, file_nameType =3D {msgt_name =3D 2, msgt_size =3D=
 32, =0D
      msgt_number =3D 1, msgt_inline =3D 1, msgt_longform =3D 0, =0D
      msgt_deallocate =3D 0, msgt_unused =3D 0}, =0D
    file_name =3D "\000\000\000\000\002 \001\020\003\000\000\000\f\b\000\02=
4/tmp/x---Type <return> to continue, or q <return> to quit---=0D
", '\000' <repeats 1001 times>, flagsType =3D {msgt_name =3D 2, msgt_size =
=3D 32, =0D
      msgt_number =3D 1, msgt_inline =3D 1, msgt_longform =3D 0, =0D
      msgt_deallocate =3D 0, msgt_unused =3D 0}, flags =3D 0, modeType =3D =
{=0D
      msgt_name =3D 2, msgt_size =3D 32, msgt_number =3D 1, msgt_inline =3D=
 1, =0D
      msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unused =3D 0}, mode =
=3D 0}, =0D
  Out =3D {Head =3D {msgh_bits =3D 2147488256, msgh_size =3D 1076, =0D
      msgh_remote_port =3D 0, msgh_local_port =3D 43, msgh_seqno =3D 241946=
, =0D
      msgh_id =3D 20118}, RetCodeType =3D {msgt_name =3D 2, msgt_size =3D 3=
2, =0D
      msgt_number =3D 1, msgt_inline =3D 1, msgt_longform =3D 0, =0D
      msgt_deallocate =3D 0, msgt_unused =3D 0}, RetCode =3D 0, do_retryTyp=
e =3D {=0D
      msgt_name =3D 2, msgt_size =3D 32, msgt_number =3D 1, msgt_inline =3D=
 1, =0D
      msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unused =3D 0}, =0D
    do_retry =3D FS_RETRY_MAGICAL, retry_nameType =3D {msgt_name =3D 12, =0D
      msgt_size =3D 8, msgt_number =3D 1024, msgt_inline =3D 1, msgt_longfo=
rm =3D 0, =0D
      msgt_deallocate =3D 0, msgt_unused =3D 0}, =0D
    retry_name =3D "/tmp/x", '\000' <repeats 1002 times>, "\002 \001\020\00=
0\000\000\000\002 \001\020\000\000\000", resultType =3D {msgt_name =3D 17, =
=0D
      msgt_size =3D 32, msgt_number =3D 1, msgt_inline =3D 1, msgt_longform=
 =3D 0, =0D
      msgt_deallocate =3D 0, msgt_unused =3D 0}, result =3D 0}}=0D
        OutP =3D (Reply *) 0x1020c28=0D
        msg_result =3D 0=0D
        msgh_simple =3D 0=0D
        msgh_size =3D 18524168=0D
        file_nameType =3D {msgt_name =3D 12, msgt_size =3D 8, msgt_number =
=3D 1024, =0D
---Type <return> to continue, or q <return> to quit---=0D
  msgt_inline =3D 1, msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unuse=
d =3D 0}=0D
        flagsType =3D {msgt_name =3D 2, msgt_size =3D 32, msgt_number =3D 1=
, =0D
  msgt_inline =3D 1, msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unuse=
d =3D 0}=0D
        modeType =3D {msgt_name =3D 2, msgt_size =3D 32, msgt_number =3D 1,=
 =0D
  msgt_inline =3D 1, msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unuse=
d =3D 0}=0D
        RetCodeCheck =3D {msgt_name =3D 2, msgt_size =3D 32, msgt_number =
=3D 1, =0D
  msgt_inline =3D 1, msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unuse=
d =3D 0}=0D
        do_retryCheck =3D {msgt_name =3D 2, msgt_size =3D 32, msgt_number =
=3D 1, =0D
  msgt_inline =3D 1, msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unuse=
d =3D 0}=0D
        retry_nameCheck =3D {msgt_name =3D 12, msgt_size =3D 8, msgt_number=
 =3D 1024, =0D
  msgt_inline =3D 1, msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unuse=
d =3D 0}=0D
        resultCheck =3D {msgt_name =3D 17, msgt_size =3D 32, msgt_number =
=3D 1, =0D
  msgt_inline =3D 1, msgt_longform =3D 0, msgt_deallocate =3D 0, msgt_unuse=
d =3D 0}=0D
#2  0x1047b18 in lookup_op (startdir=3D22) at hurdlookup.c:128=0D
        error =3D 0=0D
#3  0x1046b74 in _hurd_ports_use (which=3D1, operate=3D0x1021150) at hurdin=
it.c:42=0D
        port =3D (struct hurd_port *) 0x11a9f94=0D
        __p =3D (struct hurd_port *) 0x11a9f94=0D
        __link =3D {resource =3D {next =3D 0x0, prevp =3D 0x11a9f98}, threa=
d =3D {=0D
    next =3D 0x0, prevp =3D 0x11aac5c}, cleanup =3D 0x1065f3c <_hurd_port_c=
leanup>, =0D
  cleanup_data =3D 0x16}=0D
        __result =3D 0=0D
        which =3D 0=0D
#4  0x104830f in __hurd_file_name_lookup_retry (=0D
---Type <return> to continue, or q <return> to quit---=0D
    use_init_port=3D0x10469a0 <_hurd_ports_use>, =0D
    get_dtable_port=3D0x105e1e0 <__getdport>, lookup=3D0x119bf10 <__dir_loo=
kup>, =0D
    doretry=3DFS_RETRY_MAGICAL, retryname=3D0x102165c "/tmp/x", flags=3D0, =
mode=3D0, =0D
    result=3D0x1021a98) at hurdlookup.c:376=0D
        startdir =3D 0=0D
        dirport =3D 1=0D
        err =3D 0=0D
        file_name =3D 0x102165d "tmp/x"=0D
        nloops =3D 0=0D
#5  0x1047ab6 in __hurd_file_name_lookup (=0D
    use_init_port=3D0x10469a0 <_hurd_ports_use>, =0D
    get_dtable_port=3D0x105e1e0 <__getdport>, lookup=3D0x119bf10 <__dir_loo=
kup>, =0D
    file_name=3D0x80578e1 "tmp/x", flags=3D0, mode=3D0, result=3D0x1021a98)=
=0D
    at hurdlookup.c:97=0D
        err =3D 0=0D
        doretry =3D FS_RETRY_MAGICAL=0D
        retryname =3D "/tmp/x", '\000' <repeats 1017 times>=0D
        startport =3D 1=0D
#6  0x10485e9 in __file_name_lookup (file_name=3D0x80578e0 "/tmp/x", flags=
=3D0, =0D
    mode=3D0) at hurdlookup.c:514=0D
        err =3D 0=0D
        result =3D 0=0D
#7  0x1105be0 in __xstat (vers=3D0, file=3D0x80578e0 "/tmp/x", buf=3D0x1021=
b1c)=0D
    at ../sysdeps/mach/hurd/xstat.c:34=0D
---Type <return> to continue, or q <return> to quit---=0D
        err =3D EKERN_PROTECTION_FAILURE=0D
        port =3D 16915228=0D
#8  0x804b0e2 in strcpy () at ../sysdeps/generic/strcpy.c:31=0D
No symbol table info available.=0D
#9  0x8049822 in strcpy () at ../sysdeps/generic/strcpy.c:31=0D
No symbol table info available.=0D
#10 0x1067720 in __libc_start_main (main=3D0x8049658 <strcpy+480>, argc=3D2=
, =0D
    ubp_av=3D0x1021c30, =0D
    init=3D0x8049020 <_hurdsig_fault_exc_server_routines+116003704>, =0D
    fini=3D0x804f83c <__umoddi3+460>, rtld_fini=3D0xe6a0 <_dl_fini>, =0D
    stack_end=3D0x1021c2c) at ../sysdeps/generic/libc-start.c:129=0D
        fini =3D (void (*)()) 0x1021b1c=0D
        rtld_fini =3D (void (*)()) 0x1020b94=0D
        ubp_ev =3D (char **) 0x0=0D
(gdb) quit=0D
The program is running.  Quit anyway (and detach it)? (y or n) y=0D
Detaching from program `/bin/ls' pid 17841=0D
marcus@ulysses:/tmp$ exit=0D

Script done on Sun May 20 02:24:02 2001


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Received: (at 98071-done) by bugs.debian.org; 2 Aug 2001 16:49:41 +0000
>From Marcus.Brinkmann@ruhr-uni-bochum.de Thu Aug 02 11:49:41 2001
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Date: Thu, 2 Aug 2001 18:49:30 +0200
From: Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>
To: 98071-done@bugs.debian.org
Subject: old bug closed
Message-ID: <20010802184930.D895@212.23.136.22>
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Sender: Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>
Delivered-To: 98071-done@bugs.debian.org

Hi,

symlink to itself doesn't crash anymore.

Marcus

-- 
`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de