[Unionfs] BUG: unable to handle kernel NULL pointer dereference with unionfs and kernel 2.6.21.5

[Erez Zadok]

In message <200707061047.04222.rene.mayrhofer at gibraltar.at>, Rene Mayrhofer writes:

> I have a problem with unionfs 2.6.21.5-u3 more or less crashing my system upon 
> the first write attempt (to a tmpfs file system mounted over a read-only tree 
> from a squashfs image that is mounted loopback as the root filesystem). 
> Attached is the "dmesg" output from bootup to the BUG (which happens 
> immediately). After that, only a hard reboot will make anything happen 
> anymore...

Rene, I believe this is now fixed.  Get the latest 2.6.21.6.-u2 patch and
let me know how it works for you.

Cheers,
Erez.