KVM: SEV: Fix page dirtying in sev_gmem_post_populate()

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set_page_dirty() requires that the caller holds some kind of lock to
ensure that the page's mapping does not concurrently go away.
That is not the case for a random page we got from get_user_pages_fast(),
so use set_page_dirty_lock().

Fixes: 97cd21d57e ("KVM: SEV: Mark source page dirty when writing back CPUID data on failure")
Cc: stable@vger.kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Link: https://patch.msgid.link/20260810-x86-kvm-setpagedirty-v1-1-85f180892d4f@google.com
[sean: tag for stable]
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Jann Horn 2026-08-10 17:33:59 +02:00 • committed by Sean Christopherson

parent 88c15bbd43

commit 97818b2fa7

1 changed files with 1 additions and 1 deletions

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arch/x86/kvm/svm/sev.c

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