[rsbac] RSBAC and OpenAFS Kernel Null Pointer Exception

[Rob See]

Chirag,

    I will apply these bugfixes, but I don't think that it will fix the 
problem that I am having. In the code that I show, the dentry has been 
dropped by the time the AFS symlink code returns, so the RSBAC code 
dereferences a null dentry pointer.

Thanks,
-Rob