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[94.36.184.250]) by smtp.gmail.com with ESMTPSA id j6-v6sm6190725wro.13.2018.07.28.16.10.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 28 Jul 2018 16:10:20 -0700 (PDT) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Liran Alon , KarimAllah Ahmed , Jim Mattson , rkrcmar@redhat.com Subject: [PATCH 04/10] kvm: selftests: ensure vcpu file is released Date: Sun, 29 Jul 2018 01:10:06 +0200 Message-Id: <1532819412-51357-5-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1532819412-51357-1-git-send-email-pbonzini@redhat.com> References: <1532819412-51357-1-git-send-email-pbonzini@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The selftests were not munmap-ing the kvm_run area from the vcpu file descriptor. The result was that kvm_vcpu_release was not called and a reference was left in the parent "struct kvm". Ultimately this was visible in the upcoming state save/restore test as an error when KVM attempted to create a duplicate debugfs entry. Signed-off-by: Paolo Bonzini --- tools/testing/selftests/kvm/lib/kvm_util.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 610d1326f03d..163482873363 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -238,8 +238,12 @@ struct vcpu *vcpu_find(struct kvm_vm *vm, static void vm_vcpu_rm(struct kvm_vm *vm, uint32_t vcpuid) { struct vcpu *vcpu = vcpu_find(vm, vcpuid); + int ret; - int ret = close(vcpu->fd); + ret = munmap(vcpu->state, sizeof(*vcpu->state)); + TEST_ASSERT(ret == 0, "munmap of VCPU fd failed, rc: %i " + "errno: %i", ret, errno); + close(vcpu->fd); TEST_ASSERT(ret == 0, "Close of VCPU fd failed, rc: %i " "errno: %i", ret, errno); @@ -295,6 +299,10 @@ void kvm_vm_free(struct kvm_vm *vmp) TEST_ASSERT(ret == 0, "Close of vm fd failed,\n" " vmp->fd: %i rc: %i errno: %i", vmp->fd, ret, errno); + close(vmp->kvm_fd); + TEST_ASSERT(ret == 0, "Close of /dev/kvm fd failed,\n" + " vmp->kvm_fd: %i rc: %i errno: %i", vmp->kvm_fd, ret, errno); + /* Free the structure describing the VM. */ free(vmp); }