{"cve":"CVE-2023-54068","nvd":{"published":"2025-12-24T13:16:08.640","modified":"2026-08-04T10:19:27.373","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: compress: fix to call f2fs_wait_on_page_writeback() in f2fs_write_raw_pages()\n\nBUG_ON() will be triggered when writing files concurrently,\nbecause the same page is writtenback multiple times.\n\n1597 void folio_end_writeback(struct folio *folio)\n1598 {\n\t\t......\n1618     if (!__folio_end_writeback(folio))\n1619         BUG();\n\t\t......\n1625 }\n\nkernel BUG at mm/filemap.c:1619!\nCall Trace:\n <TASK>\n f2fs_write_end_io+0x1a0/0x370\n blk_update_request+0x6c/0x410\n blk_mq_end_request+0x15/0x130\n blk_complete_reqs+0x3c/0x50\n __do_softirq+0xb8/0x29b\n ? sort_range+0x20/0x20\n run_ksoftirqd+0x19/0x20\n smpboot_thread_fn+0x10b/0x1d0\n kthread+0xde/0x110\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x22/0x30\n </TASK>\n\nBelow is the concurrency scenario:\n\n[Process A]\t\t[Process B]\t\t[Process C]\nf2fs_write_raw_pages()\n  - redirty_page_for_writepage()\n  - unlock page()\n\t\t\tf2fs_do_write_data_page()\n\t\t\t  - lock_page()\n\t\t\t  - clear_page_dirty_for_io()\n\t\t\t  - set_page_writeback() [1st writeback]\n\t\t\t    .....\n\t\t\t    - unlock page()\n\n\t\t\t\t\t\tgeneric_perform_write()\n\t\t\t\t\t\t  - f2fs_write_begin()\n\t\t\t\t\t\t    - wait_for_stable_page()\n\n\t\t\t\t\t\t  - f2fs_write_end()\n\t\t\t\t\t\t    - set_page_dirty()\n\n  - lock_page()\n    - f2fs_do_write_data_page()\n      - set_page_writeback() [2st writeback]\n\nThis problem was introduced by the previous commit 7377e853967b (\"f2fs:\ncompress: fix potential deadlock of compress file\"). All pagelocks were\nreleased in f2fs_write_raw_pages(), but whether the page was\nin the writeback state was ignored in the subsequent writing process.\nLet's fix it by waiting for the page to writeback before writing.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/169134da419cb8ffbe3b0743bc24573e16952ea9","https://git.kernel.org/stable/c/6604df2a9d07ba8f8fb1ac14046c2c83776faa4f","https://git.kernel.org/stable/c/9940877c4fe752923a53f0f7372f2f152b6eccf0","https://git.kernel.org/stable/c/a8226a45b2a9ce83ba7a167a387a00fecc319e71","https://git.kernel.org/stable/c/ad31eed06c3b4d63b2d38322a271d4009aee4bb3"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:18:08.089039631+00:00"},"epss":{"cve":"CVE-2023-54068","score":0.00155,"percentile":0.04572,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}