From: Alexander Ofitserov <[email protected]>
From: Paolo Bonzini <[email protected]>
commit 37b2a6510a48 ("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.
URL: https://lore.kernel.org/lkml/[email protected]/
Reviewed-by: David Hildenbrand <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Signed-off-by: Alexander Ofitserov <[email protected]>
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +-
arch/x86/kvm/mmu/page_track.c | 2 +-
arch/x86/kvm/x86.c | 4 ++--
virt/kvm/kvm_main.c | 4 ++--
4 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c
index 3dd58b4ee33e5..5f6b3f80023de 100644
--- a/arch/powerpc/kvm/book3s_hv_uvmem.c
+++ b/arch/powerpc/kvm/book3s_hv_uvmem.c
@@ -250,7 +250,7 @@ int kvmppc_uvmem_slot_init(struct kvm *kvm, const struct kvm_memory_slot *slot)
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (!p)
return -ENOMEM;
- p->pfns = vzalloc(array_size(slot->npages, sizeof(*p->pfns)));
+ p->pfns = vcalloc(slot->npages, sizeof(*p->pfns));
if (!p->pfns) {
kfree(p);
return -ENOMEM;
diff --git a/arch/x86/kvm/mmu/page_track.c b/arch/x86/kvm/mmu/page_track.c
index 81cf4babbd0b4..3c379335ea477 100644
--- a/arch/x86/kvm/mmu/page_track.c
+++ b/arch/x86/kvm/mmu/page_track.c
@@ -35,7 +35,7 @@ int kvm_page_track_create_memslot(struct kvm_memory_slot *slot,
for (i = 0; i < KVM_PAGE_TRACK_MAX; i++) {
slot->arch.gfn_track[i] =
- kvcalloc(npages, sizeof(*slot->arch.gfn_track[i]),
+ __vcalloc(npages, sizeof(*slot->arch.gfn_track[i]),
GFP_KERNEL_ACCOUNT);
if (!slot->arch.gfn_track[i])
goto track_free;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 13e4699a0744f..6c2bf7cd7aec6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10826,14 +10826,14 @@ static int kvm_alloc_memslot_metadata(struct kvm_memory_slot *slot,
slot->base_gfn, level) + 1;
slot->arch.rmap[i] =
- kvcalloc(lpages, sizeof(*slot->arch.rmap[i]),
+ __vcalloc(lpages, sizeof(*slot->arch.rmap[i]),
GFP_KERNEL_ACCOUNT);
if (!slot->arch.rmap[i])
goto out_free;
if (i == 0)
continue;
- linfo = kvcalloc(lpages, sizeof(*linfo), GFP_KERNEL_ACCOUNT);
+ linfo = __vcalloc(lpages, sizeof(*linfo), GFP_KERNEL_ACCOUNT);
if (!linfo)
goto out_free;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 356fd5d1a4285..b7638c3c9eb7d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1008,9 +1008,9 @@ static int kvm_vm_release(struct inode *inode, struct file *filp)
*/
static int kvm_alloc_dirty_bitmap(struct kvm_memory_slot *memslot)
{
- unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
+ unsigned long dirty_bytes = kvm_dirty_bitmap_bytes(memslot);
- memslot->dirty_bitmap = kvzalloc(dirty_bytes, GFP_KERNEL_ACCOUNT);
+ memslot->dirty_bitmap = __vcalloc(2, dirty_bytes, GFP_KERNEL_ACCOUNT);
if (!memslot->dirty_bitmap)
return -ENOMEM;
--
2.42.1