mod_dav_svn crashing with SVNListParentPath

Hello, I think I've found a bug with SVNListParentPath that takes down
Apache.
I'm running Apache v2.2.13 along with Subversion v1.6.4. I'm running in
win32 land on a 2003 server and a Vista box.

Relevant configuration bits:

<VirtualHost *:80>
  <Location />
    DAV svn
    SVNParentPath "C:/Subversion"
    SVNListParentPath on
  </Location>
</VirtualHost>

To reproduce the bug, I submit a request to the root url (no repository)
with a svn client:

  svn info http://localhost/

If you switch SVNListParentPath off, the server does not crash.

I've briefly looked into where the crash happens in code, and it looks like
it is in util.c when dav_svn__build_uri is called. The supplied repos
parameter has a NULL root_path, and here's the relevant code that causes the
crash:

  const char *root_path = repos->root_path;

  if (root_path[1] == '\0')
    root_path = "";

It looks like the real problem is further up the stack but I'm so unfamiliar
with the code I'm just posting what I've found so far.

Thanks,
-chris

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Received on 2009-08-11 20:35:46 CEST