{"cve":"CVE-2024-56641","nvd":{"published":"2024-12-27T15:15:23.830","modified":"2026-10-15T22:18:02.013","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: initialize close_work early to avoid warning\n\nWe encountered a warning that close_work was canceled before\ninitialization.\n\n  WARNING: CPU: 7 PID: 111103 at kernel/workqueue.c:3047 __flush_work+0x19e/0x1b0\n  Workqueue: events smc_lgr_terminate_work [smc]\n  RIP: 0010:__flush_work+0x19e/0x1b0\n  Call Trace:\n   ? __wake_up_common+0x7a/0x190\n   ? work_busy+0x80/0x80\n   __cancel_work_timer+0xe3/0x160\n   smc_close_cancel_work+0x1a/0x70 [smc]\n   smc_close_active_abort+0x207/0x360 [smc]\n   __smc_lgr_terminate.part.38+0xc8/0x180 [smc]\n   process_one_work+0x19e/0x340\n   worker_thread+0x30/0x370\n   ? process_one_work+0x340/0x340\n   kthread+0x117/0x130\n   ? __kthread_cancel_work+0x50/0x50\n   ret_from_fork+0x22/0x30\n\nThis is because when smc_close_cancel_work is triggered, e.g. the RDMA\ndriver is rmmod and the LGR is terminated, the conn->close_work is\nflushed before initialization, resulting in WARN_ON(!work->func).\n\n__smc_lgr_terminate             | smc_connect_{rdma|ism}\n-------------------------------------------------------------\n                                | smc_conn_create\n\t\t\t\t| \\- smc_lgr_register_conn\nfor conn in lgr->conns_all      |\n\\- smc_conn_kill                |\n   \\- smc_close_active_abort    |\n      \\- smc_close_cancel_work  |\n         \\- cancel_work_sync    |\n            \\- __flush_work     |\n\t         (close_work)   |\n\t                        | smc_close_init\n\t                        | \\- INIT_WORK(&close_work)\n\nSo fix this by initializing close_work before establishing the\nconnection.","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":[],"references":["https://git.kernel.org/stable/c/0541db8ee32c09463a72d0987382b3a3336b0043","https://git.kernel.org/stable/c/6638e52dcfafaf1b9cbc34544f0c832db0069ea1","https://git.kernel.org/stable/c/f0c37002210aaede10dae849d1a78efc2243add2"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:57:56.913276502+00:00"},"epss":{"cve":"CVE-2024-56641","score":0.00515,"percentile":0.43591,"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."]}