Commit 62518b8b1dccb67969688228f14fb379f1918ede
Committed by
Anthony Liguori
Anthony Liguori
1 parent
4495d6a7
kvm: Fix dirty log temporary buffer size
The buffer passed to KVM_GET_DIRTY_LOG requires one bit per page. Fix the size calculation in kvm_physical_sync_dirty_bitmap accordingly, avoiding allocation of extremly oversized buffers. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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kvm-all.c
| @@ -290,7 +290,7 @@ void kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, | @@ -290,7 +290,7 @@ void kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, | ||
| 290 | return; | 290 | return; |
| 291 | } | 291 | } |
| 292 | 292 | ||
| 293 | - alloc_size = mem->memory_size >> TARGET_PAGE_BITS / sizeof(d.dirty_bitmap); | 293 | + alloc_size = ((mem->memory_size >> TARGET_PAGE_BITS) + 7) / 8; |
| 294 | d.dirty_bitmap = qemu_mallocz(alloc_size); | 294 | d.dirty_bitmap = qemu_mallocz(alloc_size); |
| 295 | 295 | ||
| 296 | d.slot = mem->slot; | 296 | d.slot = mem->slot; |