In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/vc4: Use managed KMS polling to fix UAF on unbind<\/p>\n
vc4_kms_load() calls drm_kms_helper_poll_init() but the driver provides
\nno matching drm_kms_helper_poll_fini(). The output poll work stays
\nscheduled after unbind and runs on the freed drm_device:<\/p>\n
# modprobe vc4; rmmod vc4; sleep 10
\n BUG: KASAN: slab-use-after-free in delayed_work_timer_fn
\n BUG: KASAN: slab-use-after-free in drm_client_dev_hotplug [drm]
\n Workqueue: events output_poll_execute [drm_kms_helper]
\n Allocated by task 171: __devm_drm_dev_alloc
\n Freed by task 262 (rmmod): drm_dev_put \/ component_del<\/p>\n
Use drmm_kms_helper_poll_init() so polling is finalized with the device,
\nas other drivers do.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/vc4: Use managed KMS polling to fix UAF on unbind<\/p>\n
vc4_kms_load() calls drm_kms_helper_poll_init() but the driver provides
\nno m<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33378","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33378","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=33378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}