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Tsirkin" , Albert Esteve Subject: [PATCH] hw/virtio/vhost-user: avoid using unitialized errp Date: Thu, 2 Mar 2023 13:17:19 +0100 Message-Id: <20230302121719.9390-1-aesteve@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Received-SPF: pass client-ip=170.10.129.124; envelope-from=aesteve@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, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org During protocol negotiation, when we the QEMU stub does not support a backend with F_CONFIG, it throws a warning and supresses the VHOST_USER_PROTOCOL_F_CONFIG bit. However, the warning uses warn_reportf_err macro and passes an unitialized errp pointer. However, the macro tries to edit the 'msg' member of the unitialized Error and segfaults. Instead, just use warn_report, which prints a warning message directly to the output. Fixes: 5653493 ("hw/virtio/vhost-user: don't suppress F_CONFIG when supported") Signed-off-by: Albert Esteve Reviewed-by: Peter Maydell --- hw/virtio/vhost-user.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index e68daa35d4..34c331b3ba 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -2031,8 +2031,8 @@ static int vhost_user_backend_init(struct vhost_dev *dev, void *opaque, } else { if (virtio_has_feature(protocol_features, VHOST_USER_PROTOCOL_F_CONFIG)) { - warn_reportf_err(*errp, "vhost-user backend supports " - "VHOST_USER_PROTOCOL_F_CONFIG but QEMU does not."); + warn_report("vhost-user backend supports " + "VHOST_USER_PROTOCOL_F_CONFIG but QEMU does not."); protocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_CONFIG); } }