Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: i40e: Fix macvlan leak by synchronizing access to mac_filter_hash This patch addresses a macvlan leak issue in the i40e driver caused by concurrent access to vsi->mac_filter_hash. The leak occurs when multiple threads attempt to modify the mac_filter_hash simultaneously, leading to inconsistent state and potential memory leaks. To fix this, we now wrap the calls to i40e_del_mac_filter() and zeroing vf->default_lan_addr.addr with spin_lock/unlock_bh(&vsi->mac_filter_hash_lock), ensuring atomic operations and preventing concurrent access. Additionally, we add lockdep_assert_held(&vsi->mac_filter_hash_lock) in i40e_add_mac_filter() to help catch similar issues in the future. Reproduction steps: 1. Spawn VFs and configure port vlan on them. 2. Trigger concurrent macvlan operations (e.g., adding and deleting portvlan and/or mac filters). 3. Observe the potential memory leak and inconsistent state in the mac_filter_hash. This synchronization ensures the integrity of the mac_filter_hash and prevents the described leak.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ddec6cbbe22781d17965f1e6386e5a6363c058d2 before 9db6ce9e2738b05a3672aff4d42169cf3bb5a3e3; affected fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 before 9a9747288ba0a9ad4f5c9877f18dd245770ad64e; affected fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 before 703c4d820b31bcadf465288d5746c53445f02a55; affected fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 before 8831abff1bd5b6bc8224f0c0671f46fbd702b5b2; affected fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 before dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb; affected 8bfcbaa379694e05290fcff21f4bd40afcf88776; affected 5.15.54 before 5.15.168; affected 5.18.11 before 5.19 |
| Linux / Linux | affected 5.19; unaffected 0 before 5.19; unaffected 5.15.168 through 5.15.*; unaffected 6.1.113 through 6.1.*; unaffected 6.6.57 through 6.6.*; unaffected 6.11.4 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9db6ce9e2738b05a3672aff4d42169cf3bb5a3e3
- https://git.kernel.org/stable/c/9a9747288ba0a9ad4f5c9877f18dd245770ad64e
- https://git.kernel.org/stable/c/703c4d820b31bcadf465288d5746c53445f02a55
- https://git.kernel.org/stable/c/8831abff1bd5b6bc8224f0c0671f46fbd702b5b2
- https://git.kernel.org/stable/c/dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.