{"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":"2026-08-12T03:51:21.854359593Z","published":"2025-02-26T02:24:01.148Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49666.json"},"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"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.34"},{"fixed":"5.15.53"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.190"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.111"},{"fixed":"5.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.16.20"},{"fixed":"5.17"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.17.3"},{"fixed":"5.18"}]}],"versions":["v5.15.52","v5.15.51","v5.15.50","v5.15.49","v5.15.48","v5.15.47","v5.15.46","v5.15.45","v5.15.44","v5.15.43","v5.15.42","v5.15.41","v5.15.40","v5.15.39","v5.15.38","v5.15.37","v5.15.36","v5.15.35","v5.15.34","v5.17","v5.4.189","v5.4.188","v5.10.110","v5.16.19","v5.17.2","v5.10.109","v5.16.18","v5.17.1","v5.17-rc6","v5.17-rc4","v5.16.17","v5.10.108","v5.4.187","v5.17-rc8","v5.17-rc7","v5.16.16","v5.10.107","v5.4.186","v5.17-rc1","v5.16.15","v5.10.106","v5.4.185","v5.17-rc3","v5.16.14","v5.10.105","v5.4.184","v5.17-rc2","v5.16.13","v5.10.104","v5.4.183","v5.16.12","v5.10.103","v5.4.182","v5.17-rc5","v5.16","v5.16.11","v5.10.102","v5.4.181","v5.16.10","v5.10.101","v5.4.180","v5.16.9","v5.10.100","v5.4.179","v5.16.8","v5.10.99","v5.4.178","v5.16.7","v5.10.98","v5.4.177","v5.16.6","v5.10.97","v5.16.5","v5.10.96","v5.4.176","v5.16.4","v5.10.95","v5.4.175","v5.16.3","v5.10.94","v5.4.174","v5.16.2","v5.10.93","v5.4.173","v5.4.172","v5.10.92","v5.16.1","v5.16-rc1","v5.4.171","v5.10.91","v5.16-rc8","v5.10.90","v5.4.170","v5.16-rc5","v5.16-rc6","v5.10.89","v5.4.169","v5.16-rc7","v5.10.88","v5.4.168","v5.16-rc3","v5.16-rc2","v5.10.87","v5.4.167","v5.10.86","v5.4.166","v5.16-rc4","v5.4.165","v5.10.85","v5.4.164","v5.10.84","v5.15","v5.10.83","v5.4.163","v5.4.162","v5.10.82","v5.4.161","v5.10.81","v5.10.80","v5.4.160","v5.10.79","v5.4.159","v5.10.78","v5.4.158","v5.10.77","v5.4.157","v5.15-rc2","v5.15-rc1","v5.15-rc4","v5.15-rc7","v5.10.76","v5.4.156","v5.15-rc3","v5.15-rc5","v5.10.75","v5.4.155","v5.15-rc6","v5.10.74","v5.4.154","v5.14","v5.14-rc3","v5.10.73","v5.4.153","v5.4.152","v5.10.72","v5.10.71","v5.4.151","v5.14-rc1","v5.10.70","v5.4.150","v5.10.69","v5.4.149","v5.10.68","v5.4.148","v5.10.67","v5.4.147","v5.10.66","v5.4.146","v5.10.65","v5.10.64","v5.4.145","v5.10.63","v5.4.144","v5.10.62","v5.10.61","v5.4.143","v5.14-rc2","v5.14-rc7","v5.14-rc6","v5.4.142","v5.10.60","v5.13-rc1","v5.14-rc5","v5.14-rc4","v5.10.59","v5.4.141","v5.10.58","v5.4.140","v5.10.57","v5.4.139","v5.10.56","v5.4.138","v5.10.55","v5.4.137","v5.13","v5.4.136","v5.10.54","v5.10.53","v5.4.135","v5.10.52","v5.4.134","v5.4.133","v5.10.51","v5.10.50","v5.4.132","v5.10.49","v5.4.131","v5.10.48","v5.4.130","v5.13-rc6","v5.4.129","v5.10.47","v5.13-rc7","v5.4.128","v5.10.46","v5.13-rc3","v5.13-rc2","v5.13-rc4","v5.10.45","v5.4.127","v5.10.44","v5.4.126","v5.13-rc5","v5.10.43","v5.4.125","v5.10.42","v5.4.124","v5.10.41","v5.4.123","v5.10.40","v5.4.122","v5.10.39","v5.4.121","v5.12","v5.10.38","v5.4.120","v5.10.37","v5.4.119","v5.10.36","v5.4.118","v5.10.35","v5.4.117","v5.10.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