On Tue, Apr 11, 2023 at 06:22:20PM +0200, Guennadi Liakhovetski wrote: > Hi, > > Actually there's no black magic there because there's no dereference but > only pointer arithmetic. The compiler just adds the calculated offset to > NULL and passes that small pointer to printk(). > The code in check_pointer_msg() is supposed to detect bugs but we're taking advantage of it and introducing bugs... It's might not be magic but it's pretty astonishing. regards, dan carpenter
