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Mon, 26 Jan 2026 21:17:35 -0800 (PST) X-Received: by 2002:a05:6a21:7a90:b0:384:f573:42bf with SMTP id adf61e73a8af0-38ec63fb1d9mr471146637.53.1769491055207; Mon, 26 Jan 2026 21:17:35 -0800 (PST) From: Ani Sinha To: Paolo Bonzini , Marcelo Tosatti , Zhao Liu Cc: kraxel@redhat.com, Ani Sinha , kvm@vger.kernel.org, qemu-devel@nongnu.org Subject: [PATCH v3 20/33] i386/sev: free existing launch update data and kernel hashes data on init Date: Tue, 27 Jan 2026 10:45:48 +0530 Message-ID: <20260127051612.219475-21-anisinha@redhat.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20260127051612.219475-1-anisinha@redhat.com> References: <20260127051612.219475-1-anisinha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=anisinha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1769491101881154100 Content-Type: text/plain; charset="utf-8" If there is existing launch update data and kernel hashes data, they need t= o be freed when initialization code is executed. This is important for resettable confidential guests where the initialization happens once every reset. Signed-off-by: Ani Sinha --- target/i386/sev.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/target/i386/sev.c b/target/i386/sev.c index a65a924fb3..d1dc0f3c1d 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -1772,6 +1772,7 @@ static int sev_common_kvm_init(ConfidentialGuestSuppo= rt *cgs, Error **errp) uint32_t ebx; uint32_t host_cbitpos; struct sev_user_data_status status =3D {}; + SevLaunchUpdateData *data, *next_elm; SevCommonState *sev_common =3D SEV_COMMON(cgs); SevCommonStateClass *klass =3D SEV_COMMON_GET_CLASS(cgs); X86ConfidentialGuestClass *x86_klass =3D @@ -1779,6 +1780,11 @@ static int sev_common_kvm_init(ConfidentialGuestSupp= ort *cgs, Error **errp) =20 sev_common->state =3D SEV_STATE_UNINIT; =20 + /* free existing launch update data if any */ + QTAILQ_FOREACH_SAFE(data, &launch_update, next, next_elm) { + g_free(data); + } + host_cpuid(0x8000001F, 0, NULL, &ebx, NULL, NULL); host_cbitpos =3D ebx & 0x3f; =20 @@ -1968,6 +1974,8 @@ static int sev_snp_kvm_init(ConfidentialGuestSupport = *cgs, Error **errp) { MachineState *ms =3D MACHINE(qdev_get_machine()); X86MachineState *x86ms =3D X86_MACHINE(ms); + SevCommonState *sev_common =3D SEV_COMMON(cgs); + SevSnpGuestState *sev_snp_guest =3D SEV_SNP_GUEST(sev_common); =20 if (x86ms->smm =3D=3D ON_OFF_AUTO_AUTO) { x86ms->smm =3D ON_OFF_AUTO_OFF; @@ -1976,6 +1984,10 @@ static int sev_snp_kvm_init(ConfidentialGuestSupport= *cgs, Error **errp) return -1; } =20 + /* free existing kernel hashes data if any */ + g_free(sev_snp_guest->kernel_hashes_data); + sev_snp_guest->kernel_hashes_data =3D NULL; + return 0; } =20 --=20 2.42.0