{"id":"CVE-2024-50199","summary":"mm/swapfile: skip HugeTLB pages for unuse_vma","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swapfile: skip HugeTLB pages for unuse_vma\n\nI got a bad pud error and lost a 1GB HugeTLB when calling swapoff.  The\nproblem can be reproduced by the following steps:\n\n 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.\n 2. Swapout the above anonymous memory.\n 3. run swapoff and we will get a bad pud error in kernel message:\n\n  mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)\n\nWe can tell that pud_clear_bad is called by pud_none_or_clear_bad in\nunuse_pud_range() by ftrace.  And therefore the HugeTLB pages will never\nbe freed because we lost it from page table.  We can skip HugeTLB pages\nfor unuse_vma to fix it.","modified":"2026-04-02T12:21:20.312533Z","published":"2024-11-08T05:54:13.403Z","related":["SUSE-SU-2025:0236-1","SUSE-SU-2025:0289-1","SUSE-SU-2025:0428-1","SUSE-SU-2025:0499-1","SUSE-SU-2025:0555-1","SUSE-SU-2025:0556-1","SUSE-SU-2025:0557-1","SUSE-SU-2025:0576-1","SUSE-SU-2025:0577-1","SUSE-SU-2025:0577-2","SUSE-SU-2025:0771-1","SUSE-SU-2025:0867-1","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","openSUSE-SU-2024:14500-1","openSUSE-SU-2025:14705-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50199.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/417d5838ca73c6331ae2fe692fab6c25c00d9a0b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7528c4fb1237512ee18049f852f014eba80bbe8d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ba7f982cdb37ff5a7739dec85d7325ea66fc1496"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bed2b9037806c62166a0ef9a559a1e7e3e1275b8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e41710f5a61aca9d6baaa8f53908a927dd9e7aa7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50199.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50199"},{"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":"0fe6e20b9c4c53b3e97096ee73a0857f60aad43f"},{"fixed":"ba7f982cdb37ff5a7739dec85d7325ea66fc1496"},{"fixed":"417d5838ca73c6331ae2fe692fab6c25c00d9a0b"},{"fixed":"e41710f5a61aca9d6baaa8f53908a927dd9e7aa7"},{"fixed":"6ec0fe3756f941f42f8c57156b8bdf2877b2ebaf"},{"fixed":"bed2b9037806c62166a0ef9a559a1e7e3e1275b8"},{"fixed":"eb66a833cdd2f7302ee05d05e0fa12a2ca32eb87"},{"fixed":"7528c4fb1237512ee18049f852f014eba80bbe8d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50199.json"}}],"schema_version":"1.7.5"}