After yanking out my USB-to-serial converter cable (ark3116), I was presented with the attached BUG. I've never seen such a thing yet (after running 2.6.36 for quite some time). The issue isn't trivially reproducible.
Created attachment 42182 [details]
screenshot of the BUG
Is this still an issue on 2.6.38-rc7?
I haven't hit it since then, unless it's the same memory corruption problem that I filed as bug 26582.
Ok, I'm closing this one as unreproducible. If you see it again, please reopen.