In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/virtio: fix object leak when drm_gem_handle_create() fails<\/p>\n
virtio_gpu_gem_create() owns the reference taken by
\nvirtio_gpu_object_create(). On the drm_gem_handle_create() error path it
\ncalls drm_gem_object_release() instead of dropping that reference.<\/p>\n
drm_gem_object_release() is the inverse of drm_gem_object_init() and does
\nnot touch the reference count or call obj->funcs->free(), so it is only
\ncorrect as the last step of a destructor, as in
\nvirtio_gpu_cleanup_object(). Using it here leaves the bo at refcount 1
\nwith no remaining reference, so virtio_gpu_free_object() never runs and
\nthe shmem pages, sg table and virtio_gpu_object are leaked. Since
\nvirtio_gpu_object_create() has already set bo->created,
\nVIRTIO_GPU_CMD_RESOURCE_UNREF is not queued either, leaking the host-side
\nresource and the resource id.<\/p>\n
drm_gem_handle_create_tail() drops the handle reference on all of its
\ninternal error paths, so the caller only has to drop its own. Use
\ndrm_gem_object_put(), matching the success path below.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/virtio: fix object leak when drm_gem_handle_create() fails<\/p>\n
virtio_gpu_gem_create() owns the reference taken by
\nvirtio_gpu_obje<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41081","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41081","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41081"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41081"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41081"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}