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| author | Paolo Bonzini <pbonzini@redhat.com> | 2022-03-08 04:49:37 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-03-08 09:30:57 -0500 |
| commit | 37b2a6510a48ca361ced679f92682b7b7d7d0330 (patch) | |
| tree | fb2d48b31b583fff946d7472ecfb8d89ad70f7fe /arch/x86/kvm/mmu/page_track.c | |
| parent | 3000f2e2fc855664c28d3e6a47e0373737974eb4 (diff) | |
| download | linux-37b2a6510a48ca361ced679f92682b7b7d7d0330.tar.gz linux-37b2a6510a48ca361ced679f92682b7b7d7d0330.tar.bz2 linux-37b2a6510a48ca361ced679f92682b7b7d7d0330.zip | |
KVM: use __vcalloc for very large allocations
Allocations whose size is related to the memslot size can be arbitrarily
large. Do not use kvzalloc/kvcalloc, as those are limited to "not crazy"
sizes that fit in 32 bits.
Cc: stable@vger.kernel.org
Fixes: 7661809d493b ("mm: don't allow oversized kvmalloc() calls")
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/page_track.c')
| -rw-r--r-- | arch/x86/kvm/mmu/page_track.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/kvm/mmu/page_track.c b/arch/x86/kvm/mmu/page_track.c index 68eb1fb548b6..2e09d1b6249f 100644 --- a/arch/x86/kvm/mmu/page_track.c +++ b/arch/x86/kvm/mmu/page_track.c @@ -47,8 +47,8 @@ int kvm_page_track_create_memslot(struct kvm *kvm, continue; slot->arch.gfn_track[i] = - kvcalloc(npages, sizeof(*slot->arch.gfn_track[i]), - GFP_KERNEL_ACCOUNT); + __vcalloc(npages, sizeof(*slot->arch.gfn_track[i]), + GFP_KERNEL_ACCOUNT); if (!slot->arch.gfn_track[i]) goto track_free; } @@ -75,7 +75,8 @@ int kvm_page_track_write_tracking_alloc(struct kvm_memory_slot *slot) if (slot->arch.gfn_track[KVM_PAGE_TRACK_WRITE]) return 0; - gfn_track = kvcalloc(slot->npages, sizeof(*gfn_track), GFP_KERNEL_ACCOUNT); + gfn_track = __vcalloc(slot->npages, sizeof(*gfn_track), + GFP_KERNEL_ACCOUNT); if (gfn_track == NULL) return -ENOMEM; |