[Bug libc/11333] size of struct dirent does not agree with kernel when using LFS on 32bit

["kees at outflux dot net" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From kees at outflux dot net  2010-02-27 06:38 -------
Created an attachment (id=4638)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4638&action=view)
test.c

This reports the reclen coming from the dirp->data.  sysdeps/unix/readdir_r.c:

      bytes = __GETDENTS (dirp->fd, dirp->data, maxread);
...
      dp = (DIRENT_TYPE *) &dirp->data[dirp->offset];
...
      reclen = dp->d_reclen;
...
    *result = memcpy (entry, dp, reclen);

It seems that the memcpy is what overflows.  I wonder if adding an
"assert(sizeof(*entry) >= reclen)" should be added in here for fun, too.


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Attachment #4637 is|0                           |1
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http://sourceware.org/bugzilla/show_bug.cgi?id=11333

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