In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/amdgpu: Fix init ordering in amdgpu_vram_mgr_init()<\/p>\n
drmm_cgroup_register_region() is called before INIT_LIST_HEAD() and
\ngpu_buddy_init() in amdgpu_vram_mgr_init(). If it fails, the function
\nreturns early and bypasses those initializations.<\/p>\n
Since adev->mman.initialized is set to true before amdgpu_vram_mgr_init()
\nis called, a failure triggers amdgpu_ttm_fini(), which calls
\namdgpu_vram_mgr_fini(), which then:<\/p>\n
– Calls list_for_each_entry_safe() on reservations_pending and
\n reserved_pages, whose list_head::next pointers are zero-initialized
\n (NULL). The loop does not recognize them as empty and dereferences NULL.<\/p>\n
– Calls gpu_buddy_fini(), which iterates free_trees[] unconditionally
\n via for_each_free_tree(). Since mm->free_trees is NULL
\n (never allocated), this dereferences NULL.<\/p>\n
Both result in a kernel panic on the module load error path.<\/p>\n
Fix by moving drmm_cgroup_register_region() to after the list and buddy
\nallocator are fully initialized, so the teardown path is safe to run.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/amdgpu: Fix init ordering in amdgpu_vram_mgr_init()<\/p>\n
drmm_cgroup_register_region() is called before INIT_LIST_HEAD() and
\ngpu_bu<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24515","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24515","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=24515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}