[lkml]   [2020]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 01/61] KVM: x86: Return -E2BIG when KVM_GET_SUPPORTED_CPUID hits max entries
On 03/02/20 16:59, Sean Christopherson wrote:
>> In particular, here the change is both the
>> return value and the fact that we don't do copy_to_user() anymore so I
>> think it's possible to meet a userspace which is going to get broken by
>> the change.
> Ugh, yeah, it would be possible. Qemu (retries), CrosVM (hardcoded to
> 256 entries) and Firecracker (doesn't use the ioctl()) are all ok,
> hopefully all other VMMs used in production environments follow suit.

Also: lkvm and selftests both hardcode the limit to 100.

Both would be broken by this change, but as long as the limit is < 100
now it is fine to change.


 \ /
  Last update: 2020-02-25 15:36    [W:0.210 / U:0.232 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site