Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: can: j1939: make j1939_session_activate() fail if device is no longer registered syzbot is still reporting unregister_netdevice: waiting for vcan0 to become free. Usage count = 2 even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed. Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9d71dd0c70099914fcd063135da3c580865e924c before ebb0dfd718dd31c8d3600612ca4b7207ec3d923a; affected 9d71dd0c70099914fcd063135da3c580865e924c before c3a4316e3c746af415c0fd6c6d489ad13f53714d; affected 9d71dd0c70099914fcd063135da3c580865e924c before 46ca9dc978923c5e1247a9e9519240ba7ace413c; affected 9d71dd0c70099914fcd063135da3c580865e924c before 78d87b72cebe2a993fd5b017e9f14fb6278f2eae; affected 9d71dd0c70099914fcd063135da3c580865e924c before ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536; affected 9d71dd0c70099914fcd063135da3c580865e924c before 79dd3f1d9dd310c2af89b09c71f34d93973b200f; affected 9d71dd0c70099914fcd063135da3c580865e924c before 5d5602236f5db19e8b337a2cd87a90ace5ea776d |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 5.10.248 through 5.10.*; unaffected 5.15.198 through 5.15.*; unaffected 6.1.161 through 6.1.*; unaffected 6.6.121 through 6.6.*; unaffected 6.12.66 through 6.12.*; unaffected 6.18.6 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a
- https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d
- https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c
- https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae
- https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536
- https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f
- https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d
ADP enrichment
No English description supplied.
No references supplied.