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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-12 10:39:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-12 10:39:43 -0800 |
| commit | 473348891c36ff6de3e224fefa0b3fc86a629178 (patch) | |
| tree | 21213ba19a0c010076da939c8d20d0a652c24c81 /virt | |
| parent | 7b5c8f5226bd0eb77da8a055f43b2f1a06e92ba8 (diff) | |
| parent | 826c1362e79abcd36f99092acd083b5a2d576676 (diff) | |
| download | linux-473348891c36ff6de3e224fefa0b3fc86a629178.tar.bz2 | |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Radim Krčmář:
"Minor fixes for new code, corner cases, and documentation"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
x86/kvm/nVMX: don't skip emulated instruction twice when vmptr address is not backed
Documentation/virtual/kvm: Update URL for AMD SEV API specification
KVM/VMX: Avoid return error when flush tlb successfully in the hv_remote_flush_tlb_with_range()
kvm: sev: Fail KVM_SEV_INIT if already initialized
KVM: validate userspace input in kvm_clear_dirty_log_protect()
KVM: x86: Fix bit shifting in update_intel_pt_cfg
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 1f888a103f78..5ecea812cb6a 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1227,9 +1227,9 @@ int kvm_clear_dirty_log_protect(struct kvm *kvm, { struct kvm_memslots *slots; struct kvm_memory_slot *memslot; - int as_id, id, n; + int as_id, id; gfn_t offset; - unsigned long i; + unsigned long i, n; unsigned long *dirty_bitmap; unsigned long *dirty_bitmap_buffer; @@ -1249,6 +1249,11 @@ int kvm_clear_dirty_log_protect(struct kvm *kvm, return -ENOENT; n = kvm_dirty_bitmap_bytes(memslot); + + if (log->first_page > memslot->npages || + log->num_pages > memslot->npages - log->first_page) + return -EINVAL; + *flush = false; dirty_bitmap_buffer = kvm_second_dirty_bitmap(memslot); if (copy_from_user(dirty_bitmap_buffer, log->dirty_bitmap, n)) |