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authorGustavo A. R. Silva <gustavo@embeddedor.com>2018-12-26 14:40:59 -0600
committerRadim Krčmář <rkrcmar@redhat.com>2019-01-11 18:38:07 +0100
commitd14eff1bc53e6a268c3b48da5cdb469f26832d1a (patch)
treec9375676eea85660a468998c6d17210922d91282
parentbfeffd155283772bbe78c6a05dec7c0128ee500c (diff)
downloadlinux-stericsson-d14eff1bc53e6a268c3b48da5cdb469f26832d1a.tar.gz
KVM: x86: Fix bit shifting in update_intel_pt_cfg
ctl_bitmask in pt_desc is of type u64. When an integer like 0xf is being left shifted more than 32 bits, the behavior is undefined. Fix this by adding suffix ULL to integer 0xf. Addresses-Coverity-ID: 1476095 ("Bad bit shift operation") Fixes: 6c0f0bba85a0 ("KVM: x86: Introduce a function to initialize the PT configuration") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Reviewed-by: Wei Yang <richardw.yang@linux.intel.com> Reviewed-by: Luwei Kang <luwei.kang@intel.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
-rw-r--r--arch/x86/kvm/vmx/vmx.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 4d39f731bc33..e344dc8626d0 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7044,7 +7044,7 @@ static void update_intel_pt_cfg(struct kvm_vcpu *vcpu)
/* unmask address range configure area */
for (i = 0; i < vmx->pt_desc.addr_range; i++)
- vmx->pt_desc.ctl_bitmask &= ~(0xf << (32 + i * 4));
+ vmx->pt_desc.ctl_bitmask &= ~(0xfULL << (32 + i * 4));
}
static void vmx_cpuid_update(struct kvm_vcpu *vcpu)