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hv: fix possible buffer overflow in 'vcpu_set_eoi_exit()'

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'vector' should be no greater than 0xff,else
 'eoi_exit_bitmap[]' will overflow.

Tracked-On: #1252
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yonghua Huang 2019-01-25 00:13:31 +08:00 committed by wenlingz
parent 88eeae3f1f
commit ee066a7f1c
1 changed files with 1 additions and 1 deletions
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2
hypervisor/arch/x86/guest/vcpu.c
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@ -145,7 +145,7 @@ void vcpu_set_eoi_exit(struct acrn_vcpu *vcpu, uint32_t vector)
pr_dbg("%s", __func__);
if (bitmap_test_and_set_nolock((uint16_t)(vector & 0x3fU),
&(vcpu->arch.eoi_exit_bitmap[vector >> 6U]))) {
&(vcpu->arch.eoi_exit_bitmap[(vector & 0xffU) >> 6U]))) {
pr_warn("Duplicated vector %u vcpu%u", vector, vcpu->vcpu_id);
}
}