{"id":"CVE-2022-49511","summary":"fbdev: defio: fix the pagelist corruption","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: defio: fix the pagelist corruption\n\nEasily hit the below list corruption:\n==\nlist_add corruption. prev-\u003enext should be next (ffffffffc0ceb090), but\nwas ffffec604507edc8. (prev=ffffec604507edc8).\nWARNING: CPU: 65 PID: 3959 at lib/list_debug.c:26\n__list_add_valid+0x53/0x80\nCPU: 65 PID: 3959 Comm: fbdev Tainted: G     U\nRIP: 0010:__list_add_valid+0x53/0x80\nCall Trace:\n \u003cTASK\u003e\n fb_deferred_io_mkwrite+0xea/0x150\n do_page_mkwrite+0x57/0xc0\n do_wp_page+0x278/0x2f0\n __handle_mm_fault+0xdc2/0x1590\n handle_mm_fault+0xdd/0x2c0\n do_user_addr_fault+0x1d3/0x650\n exc_page_fault+0x77/0x180\n ? asm_exc_page_fault+0x8/0x30\n asm_exc_page_fault+0x1e/0x30\nRIP: 0033:0x7fd98fc8fad1\n==\n\nFigure out the race happens when one process is adding &page-\u003elru into\nthe pagelist tail in fb_deferred_io_mkwrite(), another process is\nre-initializing the same &page-\u003elru in fb_deferred_io_fault(), which is\nnot protected by the lock.\n\nThis fix is to init all the page lists one time during initialization,\nit not only fixes the list corruption, but also avoids INIT_LIST_HEAD()\nredundantly.\n\nV2: change \"int i\" to \"unsigned int i\" (Geert Uytterhoeven)","modified":"2026-04-02T08:27:39.787979Z","published":"2025-02-26T02:13:41.433Z","related":["SUSE-SU-2025:1176-1","SUSE-SU-2025:1241-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49511.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/6a9ae2fe887042f76fd3d334349e64e8ab3c55a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/856082f021a28221db2c32bd0531614a8382be67"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e79b2b2aadeffe1db54a6b569b9b621575c3eb07"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49511.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49511"},{"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":"5d3aff76a3165087b0f897c0d677dfa987d9875d"},{"fixed":"e79b2b2aadeffe1db54a6b569b9b621575c3eb07"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"105a940416fc622406653b6fe54732897642dfbc"},{"fixed":"6a9ae2fe887042f76fd3d334349e64e8ab3c55a2"},{"fixed":"856082f021a28221db2c32bd0531614a8382be67"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49511.json"}}],"schema_version":"1.7.5"}