Bug#218657: the latest libc6 + 2.6 kernel problem

["Jeffrey W. Baker" <jwbaker@acm.org>]

Andi Kleen and David Miller believe this bug, or at the least the
symptoms of statfs64(), are caused by a bug in the kernel.  Here is the
proposed patch:

--- fs/compat.c.~1~     Wed Nov 12 16:09:49 2003
+++ fs/compat.c Wed Nov 12 16:10:35 2003
@@ -169,7 +169,6 @@
 
 static int put_compat_statfs64(struct compat_statfs64 *ubuf, struct kstatfs *kbuf)
 {
-       
        if (sizeof ubuf->f_blocks == 4) {
                if ((kbuf->f_blocks | kbuf->f_bfree |
                     kbuf->f_bavail | kbuf->f_files | kbuf->f_ffree) &
@@ -192,10 +191,13 @@
        return 0;
 }
 
-asmlinkage long compat_statfs64(const char *path, struct compat_statfs64 *buf)
+asmlinkage long compat_statfs64(const char *path, compat_size_t sz, struct compat_statfs64 *buf)
 {
        struct nameidata nd;
        int error;
+
+       if (sz != sizeof(*buf))
+               return -EINVAL;
 
        error = user_path_walk(path, &nd);
        if (!error) {