r248583 Kernel panic: negative refcount 0xfffffe0031b59168

Hey All,

I'm not sure if this is a result of r248583 or a different commit, but I
hit a kernel panic when closing Chrome. I've linked to the info and
core.txt files below. If you need me to ship you the vmcore file, let me
know. It's 1.1GB in size.

Other than the pasted files, I'm not too sure where to go from here. If
there's any other info you need, please let me know. I'm a newb at
submitting this kind of stuff.

Paste of info file: http://ix.io/4Qo
Paste of core.txt file: http://ix.io/4Qp

Thanks,

Shawn Webb