0721214a60
When protecting a superpage, we would previously fall through to the non-superpage case and read the contents of the superpage as PTEs, potentially modifying them and trying to look up underlying VM pages that don't exist if they happen to look like PTEs we would care about. This led to nginx causing an unexpected page fault in pmap_protect that panic'ed the kernel. Instead, if we see a superpage, we are done for this range and should continue to the next. Reviewed by: markj, jhb (mentor) Approved by: markj, jhb (mentor) Differential Revision: https://reviews.freebsd.org/D24827 |
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