| Message ID | 20211005121430.30136-4-david@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | proc/vmcore: sanitize access to virtio-mem memory | expand |
On 10/5/21 8:14 AM, David Hildenbrand wrote: > HVMOP_get_mem_type is not expected to fail, "This call failing is > indication of something going quite wrong and it would be good to know > about this." [1] > > Let's add a pr_warn_once(). > > [1] https://lkml.kernel.org/r/3b935aa0-6d85-0bcd-100e-15098add3c4c@oracle.com > > Suggested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> > Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
diff --git a/arch/x86/xen/mmu_hvm.c b/arch/x86/xen/mmu_hvm.c index d1b38c77352b..6ba8826dcdcc 100644 --- a/arch/x86/xen/mmu_hvm.c +++ b/arch/x86/xen/mmu_hvm.c @@ -22,8 +22,10 @@ static int xen_oldmem_pfn_is_ram(unsigned long pfn) .pfn = pfn, }; - if (HYPERVISOR_hvm_op(HVMOP_get_mem_type, &a)) + if (HYPERVISOR_hvm_op(HVMOP_get_mem_type, &a)) { + pr_warn_once("Unexpected HVMOP_get_mem_type failure\n"); return -ENXIO; + } return a.mem_type != HVMMEM_mmio_dm; } #endif
HVMOP_get_mem_type is not expected to fail, "This call failing is indication of something going quite wrong and it would be good to know about this." [1] Let's add a pr_warn_once(). [1] https://lkml.kernel.org/r/3b935aa0-6d85-0bcd-100e-15098add3c4c@oracle.com Suggested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: David Hildenbrand <david@redhat.com> --- arch/x86/xen/mmu_hvm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)