Re: [PATCH v2] virt: guest_memfd: fix reference leak on hwpoisoned page

On Tue, Jun 11, 2024 at 06:25:15AM -0400, Paolo Bonzini pbonzini@redhat.com wrote:

If __kvm_gmem_get_pfn() detects an hwpoisoned page, it returns -EHWPOISON but it does not put back the reference that kvm_gmem_get_folio() had grabbed. Add the forgotten folio_put().

Fixes: a7800aa80ea4 ("KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory") Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini pbonzini@redhat.com

Reviewed-by: Isaku Yamahata isaku.yamahata@intel.com