segfault in mount.cifs

Binary package hint: smbfs

We have samba (3.0.22-1ubuntu3.3 on dapper) configured as PDC in our domain . When I try to mount any of the cifs shares on the client (feisty samba 3.0.24-2ubuntu1.2) using command like:
mount -t cifs //fileserver/share /some/where -o user=name
i got this:

*** glibc detected *** /sbin/mount.cifs: free(): invalid pointer: 0x0805080a ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb7ee17cd]
/lib/tls/i686/cmov/libc.so.6(cfree+0x90)[0xb7ee4e30]
/sbin/mount.cifs(main+0xef8)[0x804b458]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xdc)[0xb7e8febc]
/sbin/mount.cifs[0x80491a1]
======= Memory map: ========
08048000-0804d000 r-xp 00000000 08:05 9971078 /sbin/mount.cifs
0804d000-0804e000 rw-p 00004000 08:05 9971078 /sbin/mount.cifs
0804e000-0806f000 rw-p 0804e000 00:00 0 [heap]
b7800000-b7821000 rw-p b7800000 00:00 0
b7821000-b7900000 ---p b7821000 00:00 0
b796e000-b7979000 r-xp 00000000 08:05 25166072 /lib/libgcc_s.so.1
b7979000-b797a000 rw-p 0000a000 08:05 25166072 /lib/libgcc_s.so.1
b7988000-b7ab2000 r-xp 00000000 08:05 8427384 /usr/lib/i686/cmov/libcrypto.so.0.9.8
b7ab2000-b7ac6000 rw-p 00129000 08:05 8427384 /usr/lib/i686/cmov/libcrypto.so.0.9.8
b7ac6000-b7aca000 rw-p b7ac6000 00:00 0
b7ad4000-b7ad7000 r-xp 00000000 08:05 29389739 /usr/lib/sasl2/libplain.so.2.0.22
b7ad7000-b7ad8000 rw-p 00003000 08:05 29389739 /usr/lib/sasl2/libplain.so.2.0.22
b7ad8000-b7ae3000 r-xp 00000000 08:05 29389720 /usr/lib/sasl2/libdigestmd5.so.2.0.22
b7ae3000-b7ae4000 rw-p 0000a000 08:05 29389720 /usr/lib/sasl2/libdigestmd5.so.2.0.22
b7ae4000-b7bba000 r-xp 00000000 08:05 29361277 /usr/lib/libdb-4.2.so
b7bba000-b7bbc000 rw-p 000d6000 08:05 29361277 /usr/lib/libdb-4.2.so
b7bbd000-b7bc4000 r-xp 00000000 08:05 29389730 /usr/lib/sasl2/libntlm.so.2.0.22
b7bc4000-b7bc5000 rw-p 00006000 08:05 29389730 /usr/lib/sasl2/libntlm.so.2.0.22
b7bc5000-b7bc9000 r-xp 00000000 08:05 29389711 /usr/lib/sasl2/libcrammd5.so.2.0.22
b7bc9000-b7bca000 rw-p 00003000 08:05 29389711 /usr/lib/sasl2/libcrammd5.so.2.0.22
b7bca000-b7bcd000 r-xp 00000000 08:05 29361245 /usr/lib/libgpg-error.so.0.3.0
b7bcd000-b7bce000 rw-p 00002000 08:05 29361245 /usr/lib/libgpg-error.so.0.3.0
b7bce000-b7c1d000 r-xp 00000000 08:05 29361137 /usr/lib/libgcrypt.so.11.2.2
b7c1d000-b7c1f000 rw-p 0004e000 08:05 29361137 /usr/lib/libgcrypt.so.11.2.2
b7c1f000-b7c32000 r-xp 00000000 08:05 29361099 /usr/lib/libz.so.1.2.3
b7c32000-b7c33000 rw-p 00012000 08:05 29361099 /usr/lib/libz.so.1.2.3
b7c33000-b7c47000 r-xp 00000000 08:05 29389574 /usr/lib/libtasn1.so.3.0.6
b7c47000-b7c48000 rw-p 00013000 08:05 29389574 /usr/lib/libtasn1.so.3.0.6
b7c48000-b7c4b000 r-xp 00000000 08:05 29458947 /usr/lib/libkrb5support.so.0.0
b7c4b000-b7c4c000 rw-p 00003000 08:05 29458947 /usr/lib/libkrb5support.so.0.0
b7c4c000-b7c4e000 r-xp 00000000 08:05 25166066 /lib/libcom_err.so.2.1
b7c4e000-b7c4f000 rw-p 00001000 08:05 25166066 /lib/libcom_err.so.2.1
b7c4f000-b7c73000 r-xp 00000000 08:05 29458944 /usr/lib/libk5crypto.so.3.0
b7c73000-b7c74000 rw-p 00024000 08:05 29458944 /usr/lib/libk5crypto.so.3.0
b7c74000-b7cef000 r-xp 00000000 08:05 29458946 /usr/lib/libkrb5.so.3.2
b7cef000-b7cf1000 rw-p 0007b000 08:05 29458946 /usr/lib/libkrb5.so.3.2
b7cf1000-b7d5b000 r-xp 00000000 08:05 29361230 /usr/lib/libgnutls.so.13.0.9
b7d5b000-b7d61000 rw-p 0006a000 08:05 29361230 /usr/lib/libgnutls.so.13.0.9
b7d61000-b7d77000 r-xp 00000000 08:05 29389750 /usr/lib/libsasl2.so.2.0.22
b7d77000-b7d78000 rw-p 00015000 08:05 29389750 /usr/lib/libsasl2.so.2.0.22
b7d78000-b7d7d000 r-xp 00000000 08:05 12600782 /lib/tls/i686/cmov/libcrypt-2.5.so
b7d7d000-b7d7f000 rw-p 00004000 08:05 12600782 /lib/tls/i686/cmov/libcrypt-2.5.so
b7d7f000-b7da6000 rw-p b7d7f000 00:00 0
b7da6000-b7db9000 r-xp 00000000 08:05 12600794 /lib/tls/i686/cmov/libpthread-2.5.so
b7db9000-b7dbb000 rw-p 00013000 08:05 12600794 /lib/tls/i686/cmov/libpthread-2.5.so
b7dbb000-b7dbd000 rw-p b7dbb000 00:00 0
b7dbd000-b7dd0000 r-xp 00000000 08:05 12600786 /lib/tls/i686/cmov/libnsl-2.5.so
b7dd0000-b7dd2000 rw-p 00012000 08:05 12600786 /lib/tls/i686/cmov/libnsl-2.5.so
b7dd2000-b7dd4000 rw-p b7dd2000 00:00 0
b7dd4000-b7dd6000 r-xp 00000000 08:05 12600783 /lib/tls/i686/cmov/libdl-2.5.so
b7dd6000-b7dd8000 rw-p 00001000 08:05 12600783 /lib/tls/i686/cmov/libdl-2.5.so
b7dd8000-b7df3000 r-xp 00000000 08:05 30385661 /usr/lib/libgssapi_krb5.so.2.2
b7df3000-b7df4000 rw-p 0001b000 08:05 30385661 /usr/lib/libgssapi_krb5.so.2.2
b7df4000-b7e00000 r-xp 00000000 08:05 29361322 /usr/lib/liblber.so.2.0.130
b7e00000-b7e01000 rw-p 0000b000 08:05 29361322 /usr/lib/liblber.so.2.0.130
b7e01000-b7e36000 r-xp 00000000 08:05 29361325 /usr/lib/libldap_r.so.2.0.130
b7e36000-b7e37000 rw-p 00035000 08:05 29361325 /usr/lib/libldap_r.so.2.0.130
b7e37000-b7e49000 r-xp 00000000 08:05 25681037 /lib/libnss_ldap-2.5.so
b7e49000-b7e4a000 rw-p 00012000 08:05 25681037 /lib/libnss_ldap-2.5.so
b7e4a000-b7e55000 rw-p b7e4a000 00:00 0
b7e55000-b7e64000 r-xp 00000000 08:05 12600795 /lib/tls/i686/cmov/libresolv-2.5.so
b7e64000-b7e66000 rw-p 0000f000 08:05 12600795 /lib/tls/i686/cmov/libresolv-2.5.so
b7e66000-b7e68000 rw-p b7e66000 00:00 0
b7e68000-b7e6c000 r-xp 00000000 08:05 12600788 /lib/tls/i686/cmov/libnss_dns-2.5.so
b7e6c000-b7e6e000 rw-p 00003000 08:05 12600788 /lib/tls/i686/cmov/libnss_dns-2.5.so
b7e6e000-b7e77000 r-xp 00000000 08:05 12600789 /lib/tls/i686/cmov/libnss_files-2.5.so
b7e77000-b7e79000 rw-p 00008000 08:05 12600789 /lib/tls/i686/cmov/libnss_files-2.5.so
b7e79000-b7e7a000 rw-p b7e79000 00:00 0
b7e7a000-b7fb5000 r-xp 00000000 08:05 12600780 /lib/tls/i686/cmov/libc-2.5.so
b7fb5000-b7fb6000 r--p 0013b000 08:05 12600780 /lib/tls/i686/cmov/libc-2.5.so
b7fb6000-b7fb8000 rw-p 0013c000 08:05 12600780 /lib/tls/i686/cmov/libc-2.5.so
b7fb8000-b7fbb000 rw-p b7fb8000 00:00 0
b7fbb000-b7fbe000 r-xp 00000000 08:05 29389725 /usr/lib/sasl2/liblogin.so.2.0.22
b7fbe000-b7fbf000 rw-p 00003000 08:05 29389725 /usr/lib/sasl2/liblogin.so.2.0.22
b7fbf000-b7fc2000 r-xp 00000000 08:05 29389699 /usr/lib/sasl2/libanonymous.so.2.0.22
b7fc2000-b7fc3000 rw-p 00002000 08:05 29389699 /usr/lib/sasl2/libanonymous.so.2.0.22
b7fc3000-b7fc8000 r-xp 00000000 08:05 29389749 /usr/lib/sasl2/libsasldb.so.2.0.22
b7fc8000-b7fc9000 rw-p 00004000 08:05 29389749 /usr/lib/sasl2/libsasldb.so.2.0.22
b7fc9000-b7fcb000 rw-p b7fc9000 00:00 0
b7fcb000-b7fe4000 r-xp 00000000 08:05 25166089 /lib/ld-2.5.so
b7fe4000-b7fe6000 rw-p 00019000 08:05 25166089 /lib/ld-2.5.so
bff59000-bff6e000 rw-p bff59000 00:00 0 [stack]
ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]

Weird thing is that after this command share is being mounted and I can access it, so this error is not so fatal. Nonetheless we using pam_mount in our environment, and IMHO this error causes pam_mount to be unable to unmount shares on logout. I can supply more informations if needed.