On Wed, Feb 19, 2020 at 05:56:50PM +0100, Borislav Petkov wrote: > On Wed, Feb 19, 2020 at 10:31:26AM -0500, Steven Rostedt wrote: > > Probably should document somewhere (in a comment above nmi_enter()?) > > that we allow nmi_enter() to nest up to 15 times. > > Yah, and can we make the BUG_ON() WARN_ON or so instead, so that there's > at least a chance to be able to catch it for debugging. Or is the box > going to be irreparably wedged after the 4 bits overflow? It's going to be fairly buggered, because at that point in_nmi() is going to be false again. It might survive for a little, it might not.
