CVE-2022-48985

In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix race on per-CQ variable napi work_done After calling napi_complete_done(), the NAPIF_STATE_SCHED bit may be cleared, and another CPU can start napi thread and access per-CQ variable, cq->work_done. If the other thread (for example, from busy_poll) 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 work_done variable in a local variable before napi_complete_done(), so it won't be corrupted by a possible concurrent thread after napi_complete_done(). Also, add a flag bit to advertise to the NIC firmware: the NAPI work_done variable race is fixed, so the driver is able to reliably support features like busy_poll.

The following products are affected by CVE-2022-48985 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2022-48985.

URL	Resource
https://git.kernel.org/stable/c/18010ff776fa42340efc428b3ea6d19b3e7c7b21
https://git.kernel.org/stable/c/6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3
https://git.kernel.org/stable/c/fe50a9bbeb1f042e756c5cfa7708112c944368de
https://lore.kernel.org/linux-cve-announce/2024102147-CVE-2022-48985-40b5@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-48985
https://www.cve.org/CVERecord?id=CVE-2022-48985