{"schema_version":"1.9.0","id":"CVE-2024-56677","published":"2024-12-28T09:46:06.497Z","modified":"2026-08-12T03:51:21.886602578Z","related":["SUSE-SU-2025:0289-1","SUSE-SU-2025:0428-1","SUSE-SU-2025:0499-1","SUSE-SU-2025:0557-1","SUSE-SU-2025:20165-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20248-1","SUSE-SU-2025:20249-1","USN-7276-1","USN-7277-1"],"summary":"powerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/fadump: Move fadump_cma_init to setup_arch() after initmem_init()\n\nDuring early init CMA_MIN_ALIGNMENT_BYTES can be PAGE_SIZE,\nsince pageblock_order is still zero and it gets initialized\nlater during initmem_init() e.g.\nsetup_arch() -> initmem_init() -> sparse_init() -> set_pageblock_order()\n\nOne such use case where this causes issue is -\nearly_setup() -> early_init_devtree() -> fadump_reserve_mem() -> fadump_cma_init()\n\nThis causes CMA memory alignment check to be bypassed in\ncma_init_reserved_mem(). Then later cma_activate_area() can hit\na VM_BUG_ON_PAGE(pfn & ((1 << order) - 1)) if the reserved memory\narea was not pageblock_order aligned.\n\nFix it by moving the fadump_cma_init() after initmem_init(),\nwhere other such cma reservations also gets called.\n\n<stack trace>\n==============\npage: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10010\nflags: 0x13ffff800000000(node=1|zone=0|lastcpupid=0x7ffff) CMA\nraw: 013ffff800000000 5deadbeef0000100 5deadbeef0000122 0000000000000000\nraw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\npage dumped because: VM_BUG_ON_PAGE(pfn & ((1 << order) - 1))\n------------[ cut here ]------------\nkernel BUG at mm/page_alloc.c:778!\n\nCall Trace:\n__free_one_page+0x57c/0x7b0 (unreliable)\nfree_pcppages_bulk+0x1a8/0x2c8\nfree_unref_page_commit+0x3d4/0x4e4\nfree_unref_page+0x458/0x6d0\ninit_cma_reserved_pageblock+0x114/0x198\ncma_init_reserved_areas+0x270/0x3e0\ndo_one_initcall+0x80/0x2f8\nkernel_init_freeable+0x33c/0x530\nkernel_init+0x34/0x26c\nret_from_kernel_user_thread+0x14/0x1c","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"11ac3e87ce09c27f4587a8c4fe0829d814021a82"},{"fixed":"aabef6301dcf410dfd2b8759cd413b2a003c7e3f"},{"fixed":"c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74"},{"fixed":"f551637fe9bf863386309e03f9d148d97f535ad1"},{"fixed":"7351c5a6507b4401aeecadb5959131410a339520"},{"fixed":"05b94cae1c47f94588c3e7096963c1007c4d9c1d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56677.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.19.0"},{"fixed":"6.1.120"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.64"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.11.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56677.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/05b94cae1c47f94588c3e7096963c1007c4d9c1d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7351c5a6507b4401aeecadb5959131410a339520"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aabef6301dcf410dfd2b8759cd413b2a003c7e3f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c5c1d1ef70834013fc3bd12b6a0f4664c6d75a74"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f551637fe9bf863386309e03f9d148d97f535ad1"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56677.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56677"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56677.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}