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i386: Never free migration blocker objects instead of sometimes

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invtsc_mig_blocker has static storage duration.  When a CPU with
certain features is initialized, and invtsc_mig_blocker is still null,
we add a migration blocker and store it in invtsc_mig_blocker.

The object is freed when migrate_add_blocker() fails, leaving
invtsc_mig_blocker dangling.  It is not freed on later failures.

Same for hv_passthrough_mig_blocker and hv_no_nonarch_cs_mig_blocker.

All failures are actually fatal, so whether we free or not doesn't
really matter, except as bad examples to be copied / imitated.

Clean this up in a minimal way: never free these blocker objects.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210720125408.387910-7-armbru@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Markus Armbruster 2021-07-20 14:53:58 +02:00
parent aa6f7448eb
commit a5c051b2cf
1 changed files with 0 additions and 3 deletions
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3
target/i386/kvm/kvm.c
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@ -1437,7 +1437,6 @@ static int hyperv_init_vcpu(X86CPU *cpu)
ret = migrate_add_blocker(hv_passthrough_mig_blocker, &local_err);
if (local_err) {
error_report_err(local_err);
error_free(hv_passthrough_mig_blocker);
return ret;
}
}
@ -1452,7 +1451,6 @@ static int hyperv_init_vcpu(X86CPU *cpu)
ret = migrate_add_blocker(hv_no_nonarch_cs_mig_blocker, &local_err);
if (local_err) {
error_report_err(local_err);
error_free(hv_no_nonarch_cs_mig_blocker);
return ret;
}
}
@ -1892,7 +1890,6 @@ int kvm_arch_init_vcpu(CPUState *cs)
r = migrate_add_blocker(invtsc_mig_blocker, &local_err);
if (local_err) {
error_report_err(local_err);
error_free(invtsc_mig_blocker);
return r;
}
}