On 16.05.23 16:30, Sean Christopherson wrote:
On Tue, May 16, 2023, David Hildenbrand wrote:
On 15.05.23 21:07, Sean Christopherson wrote:
On Sun, May 14, 2023, Lorenzo Stoakes wrote:
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index cb5c13eee193..eaa5bb8dbadc 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2477,7 +2477,7 @@ static inline int check_user_page_hwpoison(unsigned long addr)
{
int rc, flags = FOLL_HWPOISON | FOLL_WRITE;
- rc = get_user_pages(addr, 1, flags, NULL, NULL);
+ rc = get_user_pages(addr, 1, flags, NULL);
return rc == -EHWPOISON;
Unrelated to this patch, I think there's a pre-existing bug here. If gup() returns
a valid page, KVM will leak the refcount and unintentionally pin the page. That's
When passing NULL as "pages" to get_user_pages(), __get_user_pages_locked()
won't set FOLL_GET. As FOLL_PIN is also not set, we won't be messing with
the mapcount of the page.
For completeness: s/mapcount/refcount/ :)
Ah, that's what I'm missing.
--
Thanks,
David / dhildenb
