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| author | Maxim Levitsky <mlevitsk@redhat.com> | 2020-10-01 14:29:51 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-21 17:36:34 -0400 |
| commit | 36385ccc9b185e6958e2911d41202dd0f386298d (patch) | |
| tree | 1aacd7e77c045a7f8844eda320d3d08d25e05c33 /arch/x86 | |
| parent | d5d6c18dc454f0ee410d035429dd9e1412c01f8a (diff) | |
| download | linux-36385ccc9b185e6958e2911d41202dd0f386298d.tar.bz2 | |
KVM: x86: xen_hvm_config: cleanup return values
Return 1 on errors that are caused by wrong guest behavior
(which will inject #GP to the guest)
And return a negative error value on issues that are
the kernel's fault (e.g -ENOMEM)
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20201001112954.6258-2-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/x86.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 92f85003b4bb..3f5d08f7a637 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2842,24 +2842,19 @@ static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) u32 page_num = data & ~PAGE_MASK; u64 page_addr = data & PAGE_MASK; u8 *page; - int r; - r = -E2BIG; if (page_num >= blob_size) - goto out; - r = -ENOMEM; + return 1; + page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE); - if (IS_ERR(page)) { - r = PTR_ERR(page); - goto out; + if (IS_ERR(page)) + return PTR_ERR(page); + + if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) { + kfree(page); + return 1; } - if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) - goto out_free; - r = 0; -out_free: - kfree(page); -out: - return r; + return 0; } static inline bool kvm_pv_async_pf_enabled(struct kvm_vcpu *vcpu) |