ports/143471: nss_wins.so(samba3x) have incompatible function entry.

[Daisuke Aoyama]

>Number:         143471
>Category:       ports
>Synopsis:       nss_wins.so(samba3x) have incompatible function entry.
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Feb 02 08:40:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Daisuke Aoyama
>Release:        7.2-STABLE
>Organization:
>Environment:
FreeBSD freenas.local 7.2-STABLE FreeBSD 7.2-STABLE #0: Wed Jan 20 00:28:18 JST 2010     aoyama at fbs7.peachnw.local:/usr/obj/freenas/usr/src/sys/FREENAS-amd64  amd64
>Description:
When calls gethostbyaddr_r, nss_wins.so calls __nss_wins_freebsd_gethostbyname_r.
As a result, the caller will get signal 11.

The source (which is a part of files/patch-nsswitch__wins_freebsd.c):
        { NSDB_HOSTS, "gethostbyaddr_r",  __nss_wins_freebsd_gethostbyname_r,  _nss_wins_gethostbyname_r },

Affect:
net/samba3
net/samba32
net/samba33

Related PR:
http://www.freebsd.org/cgi/query-pr.cgi?pr=conf/123330

trace info is here:
# gdb /usr/sbin/mountd mountd.core
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
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welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "amd64-marcel-freebsd"...(no debugging symbols found)...
Core was generated by `mountd'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libutil.so.7...(no debugging symbols found)...done.
Loaded symbols for /lib/libutil.so.7
Reading symbols from /lib/libc.so.7...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /usr/local/lib/nss_winbind.so.1...done.
Loaded symbols for /usr/local/lib/nss_winbind.so.1
Reading symbols from /usr/local/lib/nss_wins.so.1...done.
Loaded symbols for /usr/local/lib/nss_wins.so.1
Reading symbols from /usr/local/lib/libldap-2.4.so.7...done.
Loaded symbols for /usr/local/lib/libldap-2.4.so.7
Reading symbols from /usr/local/lib/liblber-2.4.so.7...done.
Loaded symbols for /usr/local/lib/liblber-2.4.so.7
Reading symbols from /usr/lib/libgssapi.so.9...done.
Loaded symbols for /usr/lib/libgssapi.so.9
Reading symbols from /usr/lib/libkrb5.so.9...done.
Loaded symbols for /usr/lib/libkrb5.so.9
Reading symbols from /usr/lib/libasn1.so.9...done.
Loaded symbols for /usr/lib/libasn1.so.9
Reading symbols from /lib/libcrypto.so.5...done.
Loaded symbols for /lib/libcrypto.so.5
Reading symbols from /usr/lib/libroken.so.9...done.
Loaded symbols for /usr/lib/libroken.so.9
Reading symbols from /lib/libcrypt.so.4...done.
Loaded symbols for /lib/libcrypt.so.4
Reading symbols from /usr/lib/libcom_err.so.4...done.
Loaded symbols for /usr/lib/libcom_err.so.4
Reading symbols from /usr/local/lib/libiconv.so.3...done.
Loaded symbols for /usr/local/lib/libiconv.so.3
Reading symbols from /usr/lib/libssl.so.5...done.
Loaded symbols for /usr/lib/libssl.so.5
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x000000080083327b in memset () from /lib/libc.so.7
(gdb) info args
No symbol table info available.
(gdb) up
#1  0x0000000800cc7abc in _nss_wins_gethostbyname_r (
    hostname=0x7fffffffc910 "凄\002\037\b", he=0x7fff00000004,
    buffer=0x2 <Address 0x2 out of bounds>, buflen=34369599520,
    h_errnop=0x800967840) at nsswitch/wins.c:318
318             memset(he, '\0', sizeof(*he));
(gdb) info args
hostname = 0x7fffffffc910 "凄\002\037\b"
he = (struct hostent *) 0x7fff00000004
buffer = 0x2 <Address 0x2 out of bounds>
buflen = 34369599520
h_errnop = (int *) 0x800967840
(gdb) up
#2  0x0000000800cc7356 in __nss_wins_freebsd_gethostbyname_r (
    retval=0x7fffffffc8e0, mdata=0x800cc7a70, ap=0x7fffffffc730)
    at nsswitch/wins_freebsd.c:70
70              status = fn(hostname, he, buffer, buflen, h_errnop);
(gdb) info args
retval = (void *) 0x7fffffffc8e0
mdata = (void *) 0x800cc7a70
ap = (struct __va_list_tag *) 0x7fffffffc730
(gdb) up
#3  0x000000080080c869 in nsdispatch () from /lib/libc.so.7
(gdb) info args
No symbol table info available.
(gdb) bt
#0  0x000000080083327b in memset () from /lib/libc.so.7
#1  0x0000000800cc7abc in _nss_wins_gethostbyname_r (
    hostname=0x7fffffffc910 "凄\002\037\b", he=0x7fff00000004,
    buffer=0x2 <Address 0x2 out of bounds>, buflen=34369599520,
    h_errnop=0x800967840) at nsswitch/wins.c:318
#2  0x0000000800cc7356 in __nss_wins_freebsd_gethostbyname_r (
    retval=0x7fffffffc8e0, mdata=0x800cc7a70, ap=0x7fffffffc730)
    at nsswitch/wins_freebsd.c:70
#3  0x000000080080c869 in nsdispatch () from /lib/libc.so.7
#4  0x000000080080c203 in gethostbyaddr_r () from /lib/libc.so.7
#5  0x000000080080c35c in gethostbyaddr () from /lib/libc.so.7
#6  0x00000008007ef136 in getipnodebyaddr () from /lib/libc.so.7
#7  0x00000008007ed7bb in getnameinfo () from /lib/libc.so.7
#8  0x0000000000406bf4 in ?? ()
#9  0x00000008007cf7d3 in svc_getreq_common () from /lib/libc.so.7
#10 0x00000008007cfcec in svc_getreqset () from /lib/libc.so.7
#11 0x00000000004068b5 in ?? ()

Note:
hostname=0x7fffffffc910 contains NFS client's IP (192.168.2.31).

>How-To-Repeat:
Add wins at hosts field in /etc/nsswitch.conf.
>Fix:
Invalidate this method.

>Release-Note:
>Audit-Trail:
>Unformatted: