{"id":"CVE-2022-49666","summary":"powerpc/memhotplug: Add add_pages override for PPC","details":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/memhotplug: Add add_pages override for PPC\n\nWith commit ffa0b64e3be5 (\"powerpc: Fix virt_addr_valid() for 64-bit Book3E & 32-bit\")\nthe kernel now validate the addr against high_memory value. This results\nin the below BUG_ON with dax pfns.\n\n[  635.798741][T26531] kernel BUG at mm/page_alloc.c:5521!\n1:mon\u003e e\ncpu 0x1: Vector: 700 (Program Check) at [c000000007287630]\n    pc: c00000000055ed48: free_pages.part.0+0x48/0x110\n    lr: c00000000053ca70: tlb_finish_mmu+0x80/0xd0\n    sp: c0000000072878d0\n   msr: 800000000282b033\n  current = 0xc00000000afabe00\n  paca    = 0xc00000037ffff300   irqmask: 0x03   irq_happened: 0x05\n    pid   = 26531, comm = 50-landscape-sy\nkernel BUG at :5521!\nLinux version 5.19.0-rc3-14659-g4ec05be7c2e1 (kvaneesh@ltc-boston8) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #625 SMP Thu Jun 23 00:35:43 CDT 2022\n1:mon\u003e t\n[link register   ] c00000000053ca70 tlb_finish_mmu+0x80/0xd0\n[c0000000072878d0] c00000000053ca54 tlb_finish_mmu+0x64/0xd0 (unreliable)\n[c000000007287900] c000000000539424 exit_mmap+0xe4/0x2a0\n[c0000000072879e0] c00000000019fc1c mmput+0xcc/0x210\n[c000000007287a20] c000000000629230 begin_new_exec+0x5e0/0xf40\n[c000000007287ae0] c00000000070b3cc load_elf_binary+0x3ac/0x1e00\n[c000000007287c10] c000000000627af0 bprm_execve+0x3b0/0xaf0\n[c000000007287cd0] c000000000628414 do_execveat_common.isra.0+0x1e4/0x310\n[c000000007287d80] c00000000062858c sys_execve+0x4c/0x60\n[c000000007287db0] c00000000002c1b0 system_call_exception+0x160/0x2c0\n[c000000007287e10] c00000000000c53c system_call_common+0xec/0x250\n\nThe fix is to make sure we update high_memory on memory hotplug.\nThis is similar to what x86 does in commit 3072e413e305 (\"mm/memory_hotplug: introduce add_pages\")","modified":"2026-04-11T12:44:21.409611Z","published":"2025-02-26T02:24:01.148Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49666.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/84d146fd35a01b08e9515041de60f0f915a417d5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/89296ac435e2cf8a5101f7fab8f0c7b754b92052"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ac790d09885d36143076e7e02825c541e8eee899"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49666.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49666"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fddb88bd266f4513abab7c36bca98935c9148a98"},{"fixed":"89296ac435e2cf8a5101f7fab8f0c7b754b92052"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ffa0b64e3be58519ae472ea29a1a1ad681e32f48"},{"fixed":"84d146fd35a01b08e9515041de60f0f915a417d5"},{"fixed":"ac790d09885d36143076e7e02825c541e8eee899"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"deab81144d5a043f42804207fb76cfbd8a806978"},{"last_affected":"d36febbcd537fcc50284e8b89609632d0146529f"},{"last_affected":"a3727c25eacd7e437c4f560957fa3a376fe93e6b"},{"last_affected":"cbc065efcba000ad8f615f506ebe61b6d3c5145b"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49666.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.18.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49666.json"}}],"schema_version":"1.7.5"}