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bh=ssSaIW3ahIip0O+ym1jhKD6aHZUz0kqQ0bfZMUBR5ng=; b=Tx6z7F1zqIvtsU4YuTR/Cn7JR7LtMJ8MOKSzXQ1wRJ+TclRFnAfpAha+BpydcsUv4sg1T/ G6PmEqhKKCTyT0u+hZ0CA4tFknoO2Fk2WrN0ZnkJobUIbEA7J04XIJxFvdL2QNAvoaT5B5 V/ZrLswIgbfk1EOgi4NyXwhpx/6q9ks= X-MC-Unique: I6VGExejMGOnVvyuvAHYkA-1 From: peterx@redhat.com To: qemu-devel@nongnu.org Cc: Fabiano Rosas , peterx@redhat.com Subject: [PULL 11/15] migration: Take reference to migration state around bg_migration_vm_start_bh Date: Fri, 26 Jan 2024 12:17:21 +0800 Message-ID: <20240126041725.124562-12-peterx@redhat.com> In-Reply-To: <20240126041725.124562-1-peterx@redhat.com> References: <20240126041725.124562-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 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=170.10.133.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.5, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: 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: 1706242737373100001 Content-Type: text/plain; charset="utf-8" From: Fabiano Rosas We need to hold a reference to the current_migration object around async calls to avoid it been freed while still in use. Signed-off-by: Fabiano Rosas Link: https://lore.kernel.org/r/20240119233922.32588-3-farosas@suse.de Signed-off-by: Peter Xu --- migration/migration.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/migration/migration.c b/migration/migration.c index cf17b68e57..b1213b59ce 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -3382,6 +3382,7 @@ static void bg_migration_vm_start_bh(void *opaque) =20 vm_resume(s->vm_old_state); migration_downtime_end(s); + object_unref(OBJECT(s)); } =20 /** @@ -3486,6 +3487,7 @@ static void *bg_migration_thread(void *opaque) * writes to virtio VQs memory which is in write-protected region. */ s->vm_start_bh =3D qemu_bh_new(bg_migration_vm_start_bh, s); + object_ref(OBJECT(s)); qemu_bh_schedule(s->vm_start_bh); =20 bql_unlock(); --=20 2.43.0