CVE-2024-56641

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Source
https://cve.org/CVERecord?id=CVE-2024-56641
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-56641.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-56641
Downstream
Related
Published
2024-12-27T15:02:42.958Z
Modified
2026-03-11T07:51:28.670252Z
Summary
net/smc: initialize close_work early to avoid warning
Details

In the Linux kernel, the following vulnerability has been resolved:

net/smc: initialize close_work early to avoid warning

We encountered a warning that close_work was canceled before initialization.

WARNING: CPU: 7 PID: 111103 at kernel/workqueue.c:3047 __flushwork+0x19e/0x1b0 Workqueue: events smclgrterminatework [smc] RIP: 0010:__flush_work+0x19e/0x1b0 Call Trace: ? __wakeupcommon+0x7a/0x190 ? work_busy+0x80/0x80 __cancelworktimer+0xe3/0x160 smcclosecancelwork+0x1a/0x70 [smc] smccloseactiveabort+0x207/0x360 [smc] __smclgrterminate.part.38+0xc8/0x180 [smc] process_onework+0x19e/0x340 workerthread+0x30/0x370 ? processonework+0x340/0x340 kthread+0x117/0x130 ? __kthreadcancelwork+0x50/0x50 retfromfork+0x22/0x30

This is because when smcclosecancelwork is triggered, e.g. the RDMA driver is rmmod and the LGR is terminated, the conn->closework is flushed before initialization, resulting in WARN_ON(!work->func).

__smclgrterminate | smcconnect{rdma|ism}

                            | smc_conn_create
            | \- smc_lgr_register_conn

for conn in lgr->connsall | - smcconnkill | - smccloseactiveabort | - smcclosecancelwork | - cancelwork_sync | - __flushwork | (closework) | | smccloseinit | - INITWORK(&closework)

So fix this by initializing close_work before establishing the connection.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56641.json"
}
References

Affected packages

Git / 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
46c28dbd4c23c3f7fa37f5ea48772af79c9cc40e
Fixed
f0c37002210aaede10dae849d1a78efc2243add2
Fixed
6638e52dcfafaf1b9cbc34544f0c832db0069ea1
Fixed
0541db8ee32c09463a72d0987382b3a3336b0043

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-56641.json"