Messages in this thread | | | Date | Thu, 14 Dec 2017 18:50:32 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2 00/17] x86/ldt: Use a VMA based read only mapping |
| |
On Thu, Dec 14, 2017 at 08:35:50AM -0800, Andy Lutomirski wrote:
> > @@ -3252,6 +3256,7 @@ static const struct vm_operations_struct > > .fault = special_mapping_fault, > > .mremap = special_mapping_mremap, > > .name = special_mapping_name, > > + .split = special_mapping_split, > > }; > > > > static const struct vm_operations_struct legacy_special_mapping_vmops = { > > Disallowing splitting seems fine. Disallowing munmap might not be. > Certainly CRIU relies on being able to mremap() the VDSO.
And for mremap() we need do_munmap() to work, argh.
| |