Re: [Xen-devel] [PATCH V7 1/4] x86/mm: Add array_index_nospec to guest provided index values

2020-01-17 Thread Alexandru Stefan ISAILA
On 10.01.2020 18:12, Jan Beulich wrote: > On 08.01.2020 15:08, Alexandru Stefan ISAILA wrote: >> Changes since V6: >> - Remove stray spaces >> - Use ARRAY_SIZE(d->arch.altp2m_p2m) insead of MAX_ALTP2M. > > I'm not utterly confused: > >> --- a/xen/arch/x86/mm/mem_access.c >> +++

Re: [Xen-devel] [PATCH V7 1/4] x86/mm: Add array_index_nospec to guest provided index values

2020-01-10 Thread Jan Beulich
On 08.01.2020 15:08, Alexandru Stefan ISAILA wrote: > Changes since V6: > - Remove stray spaces > - Use ARRAY_SIZE(d->arch.altp2m_p2m) insead of MAX_ALTP2M. I'm not utterly confused: > --- a/xen/arch/x86/mm/mem_access.c > +++ b/xen/arch/x86/mm/mem_access.c > @@ -366,11 +366,13 @@

[Xen-devel] [PATCH V7 1/4] x86/mm: Add array_index_nospec to guest provided index values

2020-01-08 Thread Alexandru Stefan ISAILA
This patch aims to sanitize indexes, potentially guest provided values, for altp2m_eptp[] and altp2m_p2m[] arrays. Requested-by: Jan Beulich Signed-off-by: Alexandru Isaila Acked-by: Tamas K Lengyel --- CC: Razvan Cojocaru CC: Tamas K Lengyel CC: Petre Pircalabu CC: George Dunlap CC: Jan