Re: [PATCH v2 stable-4.4] x86/syscall: Sanitize syscall table de-references under speculation fix

On Wed, Mar 07, 2018 at 08:56:23AM +0100, Jiri Slaby wrote:

In 4.4.118, we have commit c8961332d6da (x86/syscall: Sanitize syscall table de-references under speculation), which is a backport of upstream commit 2fbd7af5af86. But it fixed only the C part of the upstream patch -- the IA32 sysentry. So it ommitted completely the assembly part -- the 64bit sysentry.

Fix that in this patch by explicit array_index_mask_nospec written in assembly. The same was used in lib/getuser.S.

<snip>

Thanks for the patch, now queued up.

greg k-h