{"cve":"CVE-2025-22127","nvd":{"published":"2025-04-16T15:16:06.813","modified":"2026-10-21T13:18:04.873","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix potential deadloop in prepare_compress_overwrite()\n\nJan Prusakowski reported a kernel hang issue as below:\n\nWhen running xfstests on linux-next kernel (6.14.0-rc3, 6.12) I\nencountered a problem in generic/475 test where fsstress process\ngets blocked in __f2fs_write_data_pages() and the test hangs.\nThe options I used are:\n\nMKFS_OPTIONS  -- -O compression -O extra_attr -O project_quota -O quota /dev/vdc\nMOUNT_OPTIONS -- -o acl,user_xattr -o discard,compress_extension=* /dev/vdc /vdc\n\nINFO: task kworker/u8:0:11 blocked for more than 122 seconds.\n      Not tainted 6.14.0-rc3-xfstests-lockdep #1\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:kworker/u8:0    state:D stack:0     pid:11    tgid:11    ppid:2      task_flags:0x4208160 flags:0x00004000\nWorkqueue: writeback wb_workfn (flush-253:0)\nCall Trace:\n <TASK>\n __schedule+0x309/0x8e0\n schedule+0x3a/0x100\n schedule_preempt_disabled+0x15/0x30\n __mutex_lock+0x59a/0xdb0\n __f2fs_write_data_pages+0x3ac/0x400\n do_writepages+0xe8/0x290\n __writeback_single_inode+0x5c/0x360\n writeback_sb_inodes+0x22f/0x570\n wb_writeback+0xb0/0x410\n wb_do_writeback+0x47/0x2f0\n wb_workfn+0x5a/0x1c0\n process_one_work+0x223/0x5b0\n worker_thread+0x1d5/0x3c0\n kthread+0xfd/0x230\n ret_from_fork+0x31/0x50\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n\nThe root cause is: once generic/475 starts toload error table to dm\ndevice, f2fs_prepare_compress_overwrite() will loop reading compressed\ncluster pages due to IO error, meanwhile it has held .writepages lock,\nit can block all other writeback tasks.\n\nLet's fix this issue w/ below changes:\n- add f2fs_handle_page_eio() in prepare_compress_overwrite() to\ndetect IO error.\n- detect cp_error earler in f2fs_read_multi_pages().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/3147ee567dd9004a49826ddeaf0a4b12865d4409","https://git.kernel.org/stable/c/4513843d58d8fa1daebd3817205a15309b146342","https://git.kernel.org/stable/c/7215cf8ef54bdc9082dffac4662416d54961e258","https://git.kernel.org/stable/c/7cd460bd9e7c6e6c30a33982603f65fb5deab1e4"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2025-22127","score":0.00188,"percentile":0.0832,"date":"2026-10-25"},"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."]}