{"id":"CVE-2024-26871","summary":"f2fs: fix NULL pointer dereference in f2fs_submit_page_write()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix NULL pointer dereference in f2fs_submit_page_write()\n\nBUG: kernel NULL pointer dereference, address: 0000000000000014\nRIP: 0010:f2fs_submit_page_write+0x6cf/0x780 [f2fs]\nCall Trace:\n\u003cTASK\u003e\n? show_regs+0x6e/0x80\n? __die+0x29/0x70\n? page_fault_oops+0x154/0x4a0\n? prb_read_valid+0x20/0x30\n? __irq_work_queue_local+0x39/0xd0\n? irq_work_queue+0x36/0x70\n? do_user_addr_fault+0x314/0x6c0\n? exc_page_fault+0x7d/0x190\n? asm_exc_page_fault+0x2b/0x30\n? f2fs_submit_page_write+0x6cf/0x780 [f2fs]\n? f2fs_submit_page_write+0x736/0x780 [f2fs]\ndo_write_page+0x50/0x170 [f2fs]\nf2fs_outplace_write_data+0x61/0xb0 [f2fs]\nf2fs_do_write_data_page+0x3f8/0x660 [f2fs]\nf2fs_write_single_data_page+0x5bb/0x7a0 [f2fs]\nf2fs_write_cache_pages+0x3da/0xbe0 [f2fs]\n...\nIt is possible that other threads have added this fio to io-\u003ebio\nand submitted the io-\u003ebio before entering f2fs_submit_page_write().\nAt this point io-\u003ebio = NULL.\nIf is_end_zone_blkaddr(sbi, fio-\u003enew_blkaddr) of this fio is true,\nthen an NULL pointer dereference error occurs at bio_get(io-\u003ebio).\nThe original code for determining zone end was after \"out:\",\nwhich would have missed some fio who is zone end. I've moved\n this code before \"skip:\" to make sure it's done for each fio.","modified":"2026-04-02T10:06:14.979792Z","published":"2024-04-17T10:27:31.396Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26871.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4c122a32582b67bdd44ca8d25f894ee2dc54f566"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6d102382a11d5e6035f6c98f6e508a38541f7af3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8e2ea8b04cb8d976110c4568509e67d6a39b2889"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c2034ef6192a65a986a45c2aa2ed05824fdc0e9f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26871.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26871"},{"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":"e067dc3c6b9c419bac43c6a0be2d85f44681f863"},{"fixed":"8e2ea8b04cb8d976110c4568509e67d6a39b2889"},{"fixed":"4c122a32582b67bdd44ca8d25f894ee2dc54f566"},{"fixed":"6d102382a11d5e6035f6c98f6e508a38541f7af3"},{"fixed":"c2034ef6192a65a986a45c2aa2ed05824fdc0e9f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26871.json"}}],"schema_version":"1.7.5"}