diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2024-08-06 20:48:43 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-08-07 15:35:01 +0200 |
| commit | c48b5a4cf3125adb679e28ef093f66ff81368d05 (patch) | |
| tree | ec112fd4825d3743d81b429d6a0984d4c82e8536 /mm | |
| parent | de9c2c66ad8e787abec7c9d7eff4f8c3cdd28aed (diff) | |
x86/mm: Fix PTI for i386 some more
So it turns out that we have to do two passes of
pti_clone_entry_text(), once before initcalls, such that device and
late initcalls can use user-mode-helper / modprobe and once after
free_initmem() / mark_readonly().
Now obviously mark_readonly() can cause PMD splits, and
pti_clone_pgtable() doesn't like that much.
Allow the late clone to split PMDs so that pagetables stay in sync.
[peterz: Changelog and comments]
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lkml.kernel.org/r/20240806184843.GX37996@noisy.programming.kicks-ass.net
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions