Author: neel
Date: Tue Dec 30 23:38:31 2014
New Revision: 276432
URL: https://svnweb.freebsd.org/changeset/base/276432
Log:
Initialize all fields of 'struct vm_exception exception' before passing it to
vm_inject_exception(). This fixes the issue that 'exception.cpuid' is
uninitialized when calling 'vm_inject_exception()'.
However, in practice this change is a no-op because vm_inject_exception()
does not use 'exception.cpuid' for anything.
Reported by: Coverity Scan
CID: 1261297
MFC after: 3 days
Modified:
head/sys/amd64/vmm/amd/svm.c
Modified: head/sys/amd64/vmm/amd/svm.c
==============================================================================
--- head/sys/amd64/vmm/amd/svm.c Tue Dec 30 22:46:20 2014
(r276431)
+++ head/sys/amd64/vmm/amd/svm.c Tue Dec 30 23:38:31 2014
(r276432)
@@ -1322,9 +1322,12 @@ svm_vmexit(struct svm_softc *svm_sc, int
if (reflect) {
/* Reflect the exception back into the guest */
+ bzero(&exception, sizeof(struct vm_exception));
exception.vector = idtvec;
- exception.error_code_valid = errcode_valid;
- exception.error_code = errcode_valid ? info1 : 0;
+ if (errcode_valid) {
+ exception.error_code = info1;
+ exception.error_code_valid = 1;
+ }
VCPU_CTR2(svm_sc->vm, vcpu, "Reflecting exception "
"%d/%#x into the guest", exception.vector,
exception.error_code);
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