Command "df -hP" segmentation fault if path with non-utf8 characters is mounted

Issue

• If system mounted NFS with non-utf8 characters in path (eg. gbk), df -P will segfault. For example, mounting a NFS with Chinese words in its mount path.

[root@df-debug ~]# mount 192.168.122.71:`echo "/vx/pub06/2008年9月"| iconv -f utf-8 -t gbk` /mnt/nfs/
[root@df-debug ~]# df -hP
Filesystem                          Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root        6.7G  1.1G  5.3G  17% /
tmpfs                               499M     0  499M   0% /dev/shm
/dev/sda1                           485M   33M  427M   8% /boot
Segmentation fault  <<-------

• df -hP dumps a core like below:

Core was generated by `df -hP'.
Program terminated with signal 11, Segmentation fault.
#0  __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:32
32      movdqu  (%rdi), %xmm1