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Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL 22/35] hw/virtio: Add flatview update in vhost_user_cleanup() Message-ID: <20210904213506.486886-23-mst@redhat.com> References: <20210904213506.486886-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20210904213506.486886-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Disposition: inline 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=216.205.24.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.391, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Yuwei Zhang Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1630792225603100001 From: Yuwei Zhang Qemu will crash on vhost backend unexpected exit and re-connect = =E2=94=82 in some case due to access released memory. Signed-off-by: Yuwei Zhang Message-Id: <20210830123433.45727-1-zhangyuwei.9149@bytedance.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/vhost-user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 360d9bc040..2c8556237f 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -2480,7 +2480,7 @@ void vhost_user_cleanup(VhostUserState *user) if (!user->chr) { return; } - + memory_region_transaction_begin(); for (i =3D 0; i < VIRTIO_QUEUE_MAX; i++) { if (user->notifier[i].addr) { object_unparent(OBJECT(&user->notifier[i].mr)); @@ -2488,6 +2488,7 @@ void vhost_user_cleanup(VhostUserState *user) user->notifier[i].addr =3D NULL; } } + memory_region_transaction_commit(); user->chr =3D NULL; } =20 --=20 MST