diff options
| author | Andi Kleen <ak@linux.intel.com> | 2018-08-07 15:09:37 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-15 17:42:10 +0200 |
| commit | 9feecdb6cb73feaa55b0135aee8777eaac848c78 (patch) | |
| tree | 56ac6e30f0d7b99e6103f0ca50ce5caa891516e6 /mm/page_alloc.c | |
| parent | 0aae5fe8413dfcd949d0df1c7d6b835efecd5b3b (diff) | |
x86/speculation/l1tf: Make pmd/pud_mknotpresent() invert
commit 0768f91530ff46683e0b372df14fd79fe8d156e5 upstream
Some cases in THP like:
- MADV_FREE
- mprotect
- split
mark the PMD non present for temporarily to prevent races. The window for
an L1TF attack in these contexts is very small, but it wants to be fixed
for correctness sake.
Use the proper low level functions for pmd/pud_mknotpresent() to address
this.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/page_alloc.c')
0 files changed, 0 insertions, 0 deletions