{"id":"CVE-2024-41083","summary":"netfs: Fix netfs_page_mkwrite() to check folio-\u003emapping is valid","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix netfs_page_mkwrite() to check folio-\u003emapping is valid\n\nFix netfs_page_mkwrite() to check that folio-\u003emapping is valid once it has\ntaken the folio lock (as filemap_page_mkwrite() does).  Without this,\ngeneric/247 occasionally oopses with something like the following:\n\n    BUG: kernel NULL pointer dereference, address: 0000000000000000\n    #PF: supervisor read access in kernel mode\n    #PF: error_code(0x0000) - not-present page\n\n    RIP: 0010:trace_event_raw_event_netfs_folio+0x61/0xc0\n    ...\n    Call Trace:\n     \u003cTASK\u003e\n     ? __die_body+0x1a/0x60\n     ? page_fault_oops+0x6e/0xa0\n     ? exc_page_fault+0xc2/0xe0\n     ? asm_exc_page_fault+0x22/0x30\n     ? trace_event_raw_event_netfs_folio+0x61/0xc0\n     trace_netfs_folio+0x39/0x40\n     netfs_page_mkwrite+0x14c/0x1d0\n     do_page_mkwrite+0x50/0x90\n     do_pte_missing+0x184/0x200\n     __handle_mm_fault+0x42d/0x500\n     handle_mm_fault+0x121/0x1f0\n     do_user_addr_fault+0x23e/0x3c0\n     exc_page_fault+0xc2/0xe0\n     asm_exc_page_fault+0x22/0x30\n\nThis is due to the invalidate_inode_pages2_range() issued at the end of the\nDIO write interfering with the mmap'd writes.","modified":"2026-03-20T12:36:38.664253Z","published":"2024-07-29T15:47:59.419Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41083.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3473eb87afd402e415a8ca885b284ea0420dde25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41083.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-41083"},{"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":"102a7e2c598c22bd2621fa97eb1c93c89d469a12"},{"fixed":"3473eb87afd402e415a8ca885b284ea0420dde25"},{"fixed":"a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-41083.json"}}],"schema_version":"1.7.5"}