diff options
| author | David Hildenbrand <david@redhat.com> | 2024-04-10 17:55:26 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-06 02:53:27 +0200 |
| commit | 29ae7d96d166fa08c7232daf8a314ef5ba1efd20 (patch) | |
| tree | ce705a55e77e2e85442ff965a37e5a7c980ddf97 /arch/x86 | |
| parent | drivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map() (diff) | |
| download | linux-29ae7d96d166fa08c7232daf8a314ef5ba1efd20.tar.xz linux-29ae7d96d166fa08c7232daf8a314ef5ba1efd20.zip | |
mm: pass VMA instead of MM to follow_pte()
... and centralize the VM_IO/VM_PFNMAP sanity check in there. We'll
now also perform these sanity checks for direct follow_pte()
invocations.
For generic_access_phys(), we might now check multiple times: nothing to
worry about, really.
Link: https://lkml.kernel.org/r/20240410155527.474777-3-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Sean Christopherson <seanjc@google.com> [KVM]
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Fei Li <fei1.li@intel.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Yonghua Huang <yonghua.huang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/mm/pat/memtype.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/x86/mm/pat/memtype.c b/arch/x86/mm/pat/memtype.c index d01c3b0bd6eb..bdc2a240c2aa 100644 --- a/arch/x86/mm/pat/memtype.c +++ b/arch/x86/mm/pat/memtype.c @@ -954,10 +954,7 @@ static int follow_phys(struct vm_area_struct *vma, unsigned long *prot, pte_t *ptep, pte; spinlock_t *ptl; - if (!(vma->vm_flags & (VM_IO | VM_PFNMAP))) - return -EINVAL; - - if (follow_pte(vma->vm_mm, vma->vm_start, &ptep, &ptl)) + if (follow_pte(vma, vma->vm_start, &ptep, &ptl)) return -EINVAL; pte = ptep_get(ptep); |