CVE-2022-48985
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-48985
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48985.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-48985
- Downstream
- Related
- Published
- 2024-10-21T20:06:01Z
- Modified
- 2025-10-15T17:39:22.538295Z
- Summary
- net: mana: Fix race on per-CQ variable napi work_done
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: mana: Fix race on per-CQ variable napi work_done
After calling napicompletedone(), the NAPIFSTATESCHED bit may be cleared, and another CPU can start napi thread and access per-CQ variable, cq->workdone. If the other thread (for example, from busypoll) sets it to a value >= budget, this thread will continue to run when it should stop, and cause memory corruption and panic.
To fix this issue, save the per-CQ workdone variable in a local variable before napicompletedone(), so it won't be corrupted by a possible concurrent thread after napicomplete_done().
Also, add a flag bit to advertise to the NIC firmware: the NAPI workdone variable race is fixed, so the driver is able to reliably support features like busypoll.
- 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
-
Introducede1b5683ff62e7b328317aec08869495992053e9dFixedfe50a9bbeb1f042e756c5cfa7708112c944368de
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede1b5683ff62e7b328317aec08869495992053e9dFixed6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede1b5683ff62e7b328317aec08869495992053e9dFixed18010ff776fa42340efc428b3ea6d19b3e7c7b21