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blTi7SmYPh8lc4FbHoXlCsROQIfuK4ibgSLsn9EUH1ZsPp1xE/YTNFqWn0ElKFStm xWX9n4lm1By3shL3sLItauliZ1IgOvmmafK539sRR3hjlPlh3kordnZolr+WjMWNs vxwUZuF8sS4s+vi4pGzoGcpm4p9ySw2hTOdBub5zM5t0SrvXsafKIl2GkRRd/ShWn ppBmNXEuWFXxAKmUXA== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a From: Tom Desnoyers To: tom.ds1@gmx.com Cc: alex.bennee@linaro.org, dmitry.osipenko@collabora.com, mst@redhat.com, odaki@rsg.ci.i.u-tokyo.ac.jp, qemu-devel@nongnu.org Subject: [PATCH v2] virtio-gpu: fix memory leaks in virgl and rutabaga Date: Mon, 12 Oct 2026 18:57:54 +0200 Message-ID: <20261012165754.11891-1-tom.ds1@gmx.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261006135504.416083-1-tom.ds1@gmx.com> References: <20261006135504.416083-1-tom.ds1@gmx.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:yrovXRP55qsXK8HiYF7a0Pxvng2O1/x0TM1OVmijEHNTiUFH06x rl8EqS+n72KYeq0uG5dIcOC4AxpOD1Y5gI7sbnuch1PJc7lmxUgci2SQbWC8BIjw4bWU3tp 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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 tom.ds1@gmx.com) X-ZM-MESSAGEID: 1791824350436158500 Content-Type: text/plain; charset="utf-8" When a gpu buffer backed by a guest-memory blob is unreferenced, virgl and rutabaga free the resource but not its addrs field, leaking memory on every unref. In virtio-gpu-virgl.c, call virtio_gpu_cleanup_mapping() instead of virtio_gpu_cleanup_mapping_iov(). In virtio-gpu-rutabaga.c, call virtio_gpu_cleanup_mapping() before freeing the resource. Resolves: https://gitlab.com/qemu-project/qemu/-/work_items/4634 Signed-off-by: Tom Desnoyers Reviewed-by: Marc-Andr=C3=A9 Lureau --- v2: - replace virtio_gpu_cleanup_mapping_iov() by virtio_gpu_cleanup_mapping() = (Akihiko Odaki) v1: https://lore.kernel.org/qemu-devel/20261006135504.416083-1-tom.ds1@gmx.com hw/display/virtio-gpu-rutabaga.c | 2 ++ hw/display/virtio-gpu-virgl.c | 6 +++--- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/hw/display/virtio-gpu-rutabaga.c b/hw/display/virtio-gpu-rutab= aga.c index 3aafa4dc66..e5c993c758 100644 --- a/hw/display/virtio-gpu-rutabaga.c +++ b/hw/display/virtio-gpu-rutabaga.c @@ -164,6 +164,8 @@ virtio_gpu_rutabaga_resource_unref(VirtIOGPU *g, } =20 QTAILQ_REMOVE(&g->reslist, res, next); + + virtio_gpu_cleanup_mapping(g, res); g_free(res); } =20 diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c index f45571060f..f71f287d94 100644 --- a/hw/display/virtio-gpu-virgl.c +++ b/hw/display/virtio-gpu-virgl.c @@ -451,13 +451,13 @@ virtio_gpu_virgl_resource_unref(VirtIOGPU *g, virgl_renderer_resource_detach_iov(res->base.resource_id, &res_iovs, &num_iovs); - if (res_iovs !=3D NULL && num_iovs !=3D 0) { - virtio_gpu_cleanup_mapping_iov(g, res_iovs, num_iovs); - } + res->base.iov =3D res_iovs; + res->base.iov_cnt =3D num_iovs; virgl_renderer_resource_unref(res->base.resource_id); =20 QTAILQ_REMOVE(&g->reslist, &res->base, next); =20 + virtio_gpu_cleanup_mapping(g, &res->base); g_free(res); =20 return 0; --=20 2.56.0