diff options
author | Christoffer Dall <christoffer.dall@linaro.org> | 2014-09-25 18:41:07 +0200 |
---|---|---|
committer | Luis Henriques <luis.henriques@canonical.com> | 2015-05-20 13:25:45 +0100 |
commit | e2dcb5526e52fb38396ba023bcb6b323e6a4b9fa (patch) | |
tree | ddcf717f5c55ef8e54afaca9f4b5d47a376cb34a /virt | |
parent | e719b4c8f478d6840f62063658d703f22a1a97cf (diff) |
arm/arm64: KVM: Fix set_clear_sgi_pend_reg offset
commit 0fea6d7628ed6e25a9ee1b67edf7c859718d39e8 upstream.
The sgi values calculated in read_set_clear_sgi_pend_reg() and
write_set_clear_sgi_pend_reg() were horribly incorrectly multiplied by 4
with catastrophic results in that subfunctions ended up overwriting
memory not allocated for the expected purpose.
This showed up as bugs in kfree() and the kernel complaining a lot of
you turn on memory debugging.
This addresses: http://marc.info/?l=kvm&m=141164910007868&w=2
Reported-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'virt')
-rw-r--r-- | virt/kvm/arm/vgic.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index b224b729cd0f..078e704940b3 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -674,7 +674,7 @@ static bool read_set_clear_sgi_pend_reg(struct kvm_vcpu *vcpu, { struct vgic_dist *dist = &vcpu->kvm->arch.vgic; int sgi; - int min_sgi = (offset & ~0x3) * 4; + int min_sgi = (offset & ~0x3); int max_sgi = min_sgi + 3; int vcpu_id = vcpu->vcpu_id; u32 reg = 0; @@ -695,7 +695,7 @@ static bool write_set_clear_sgi_pend_reg(struct kvm_vcpu *vcpu, { struct vgic_dist *dist = &vcpu->kvm->arch.vgic; int sgi; - int min_sgi = (offset & ~0x3) * 4; + int min_sgi = (offset & ~0x3); int max_sgi = min_sgi + 3; int vcpu_id = vcpu->vcpu_id; u32 reg; |