File util-linux-umount-user.patch of Package util-linux.openSUSE_13.1_Update

commit 4e9f59d1ee293108cd1d577f7b1a182f5b0ac9c0
Author: Dave Reisner <dreisner@archlinux.org>
Date:   Tue Sep 17 17:05:09 2013 -0400

    libmount: use memmove when overlap possible
    
    When unmounting some mountpoints as an unprivileged user (via the
    'user' option in fstab), the umount fails. Debug output of 'umount
    /opt' reveals:
    
    17760: libmount: CXT: [0x22890e0]: do umount
    17760: libmount: UTILS: moving to /opt parent
    17760: libmount: CXT: current directory moved to / [last_component='opt']
    17760: libmount: CXT: [0x22890e0]: umount(2) [target='pt', flags=0x00000000]
    
    valgrind shows the problem:
    
    ==23544== Source and destination overlap in memcpy(0x58d1370, 0x58d1371, 4)
    ==23544==    at 0x4C2BBC3: memcpy@@GLIBC_2.14 (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
    ==23544==    by 0x4E537C3: mnt_chdir_to_parent (utils.c:168)
    ==23544==    by 0x4E45E4C: mnt_context_do_umount (context_umount.c:601)
    ==23544==    by 0x4E46513: mnt_context_umount (context_umount.c:855)
    ==23544==    by 0x403476: umount_one (umount.c:299)
    ==23544==    by 0x402B34: main (umount.c:629)
    ==23544==
    
    ref: https://bugs.archlinux.org/task/36968
    Signed-off-by: Dave Reisner <dreisner@archlinux.org>

diff --git a/libmount/src/utils.c b/libmount/src/utils.c
index 9f99241..3cab936 100644
--- a/libmount/src/utils.c
+++ b/libmount/src/utils.c
@@ -165,7 +165,7 @@ int mnt_chdir_to_parent(const char *target, char **filename)
 		if (!last || !*last)
 			memcpy(*filename, ".", 2);
 		else
-			memcpy(*filename, last, strlen(last) + 1);
+			memmove(*filename, last, strlen(last) + 1);
 	} else
 		free(buf);
 	return 0;