Date: Thu, 25 Aug 2005 10:57:24 +0300 From: Panagiotis Astithas <past@ebs.gr> To: Nikolay Kalev <nkalev@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: unknown coredump ! Message-ID: <430D79E4.2040006@ebs.gr> In-Reply-To: <430D735D.20507@gmail.com> References: <430C36BD.1020808@gmail.com> <20050824222516.GA1106@wantadilla.lemis.com> <430D665B.9030108@gmail.com> <d227e09e05082500052afd93fb@mail.gmail.com> <430D735D.20507@gmail.com>
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Nikolay Kalev wrote:
> Pawel Worach wrote:
>
>> On 8/25/05, Nikolay Kalev <nkalev@gmail.com> wrote:
>>
>>
>>> chkgrp: /etc/group: line 30: missing field(s)
>>> Segmentation fault (core dumped)
>>> Exit 3
>>>
>>> so i found the problem in my group file there was a bugy line that i
>>> added ... i;m not sure if this is normal to coredump when the syntax in
>>> /etc/group is mistaken ???
>>>
>>> the line was : "user:1001:" and it has to be "user:*:1001:"
>>>
>>>
>>
>>
>> I can not reproduce this on a 7-CURRENT system.
>>
>> # grep -n ^user /etc/group
>> 30:user:1001:
>> # chkgrp
>> chkgrp: /etc/group: line 30: missing field(s)
>> chkgrp: /etc/group: line 30: GID is not numeric
>>
>> You can get a chkgrp with debug symbols this way:
>> # cd /usr/src/usr.sbin/chkgrp/
>> # make clean
>> # make DEBUG_FLAGS=-g
>> # make STRIP= install
>>
>> Then reproduce the problem and fire up gdb as said elsewhere..
>>
>>
>>
> [lapi]:/root# gdb -c chkgrp.core /usr/sbin/chkgrp
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 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 "i386-marcel-freebsd"...
> Core was generated by `chkgrp'.
> Program terminated with signal 11, Segmentation fault.
> Reading symbols from /lib/libc.so.6...done.
> Loaded symbols for /lib/libc.so.6
> Reading symbols from /libexec/ld-elf.so.1...done.
> Loaded symbols for /libexec/ld-elf.so.1
> #0 0x280b67b1 in strcspn () from /lib/libc.so.6
> (gdb) bt
> #0 0x280b67b1 in strcspn () from /lib/libc.so.6
> #1 0x08048a3c in main (argc=65536, argv=0x10000) at chkgrp.c:137
> (gdb)
>
>
> As i said, my system is FreeBSD 6.0 BETA3
> i wonder if others have the same problem with beta3 ?
I can confirm it too, on:
FreeBSD ajax.ebs.gr 6.0-BETA3 FreeBSD 6.0-BETA3 #2: Mon Aug 22 23:38:51
EEST 2005 root@:/usr/obj/usr/src/sys/GENERIC i386
I get the following from a full trace:
(gdb) bt full
#0 0x280bf7b1 in strcspn () from /lib/libc.so.6
No symbol table info available.
#1 0x08048a3c in main (argc=65536, argv=0x10000)
at /usr/src/usr.sbin/chkgrp/chkgrp.c:137
i = 14
len = 14
n = 30
k = 2
e = 1
line = 0xffffffff <Address 0xffffffff out of bounds>
f = {0x804b19a "past", 0x804b19f "1001",
0x804b1a4 "past\ngdm:*:92:\nmessagebus:*:556:\n", 'Π' <repeats 167
times>..., 0x804b199 ""}
p = 0x0
cp = 0xffffffff <Address 0xffffffff out of bounds>
gfn = 0x8048c1e "/etc/group"
gf = (FILE *) 0x281522c0
(gdb)
Cheers,
Panagiotis
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