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commitc31745d2c5upstream. 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:a7800aa80e("KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory") Cc: stable@vger.kernel.org Reviewed-by: Liam Merwick <liam.merwick@oracle.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>