Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 7 Jan 2021 14:42:17 -0800 | Subject | Re: [PATCH 2/2] mm: soft_dirty: userfaultfd: introduce wrprotect_tlb_flush_pending |
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On Thu, Jan 7, 2021 at 2:31 PM Andrea Arcangeli <aarcange@redhat.com> wrote: > > Random memory corruption will still silently materialize as result of > the speculative lookups in the above scenario.
Explain.
Yes, you'll get random memory corruption if you keep doing wrprotect() without mmap_sem held for writing.
But I thought we agreed earlier that that is a bug. And I thought the softdirty code already got it for writing.
Linus
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