On Mon, Apr 06, 2020 at 06:01:55AM -0700, Christoph Hellwig wrote: > On Fri, Apr 03, 2020 at 06:32:53PM +0200, Peter Zijlstra wrote: > > > > __get_vm_area() is an exported symbol, make sure the callers stay in > > the expected memory range. When calling this function with memory > > ranges outside of the VMALLOC range *bad* things can happen. > > > > (I noticed this when I managed to corrupt the kernel text by accident) > > Maybe it is time to unexport it? There are only two users: > > - staging/media/ipu3 really should be using vmap. And given that it > is a staging driver it really doesn't matter anyway if we break it. > - pcmcia/electra_cf.c is actually using it for something that is not > a vmalloc address. But it is so special that I think prohibiting > to build it as module seems fine. I think I just sent you a patch along those lines ;-)
