Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e1b5683ff62e7b328317aec08869495992053e9d before fe50a9bbeb1f042e756c5cfa7708112c944368de; affected e1b5683ff62e7b328317aec08869495992053e9d before 6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3; affected e1b5683ff62e7b328317aec08869495992053e9d before 18010ff776fa42340efc428b3ea6d19b3e7c7b21 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 5.15.83 through 5.15.*; unaffected 6.0.13 through 6.0.*; unaffected 6.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/fe50a9bbeb1f042e756c5cfa7708112c944368de
- https://git.kernel.org/stable/c/6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3
- https://git.kernel.org/stable/c/18010ff776fa42340efc428b3ea6d19b3e7c7b21
ADP enrichment
No English description supplied.
No references supplied.