Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: avoid socket lock inversion in listener cleanup rfcomm_sock_cleanup_listen() closes unaccepted child sockets through rfcomm_sock_close(), which takes the child socket lock before rfcomm_dlc_close() acquires rfcomm_mutex. The RFCOMM worker takes these locks in reverse order while handling connections and DLC state changes, so lockdep reports a possible deadlock. Close dequeued children without taking their socket lock. The accept queue owns a reference to each child, and bt_accept_dequeue() locks the child while unlinking it and clearing its parent pointer. Dropping the child lock makes it important to prevent a concurrent rfcomm_connect_ind() from enqueueing a new child after cleanup observes an empty queue. Set a listening socket to BT_CLOSED while its lock is still held, before dropping the lock and draining the queue. The state check in rfcomm_connect_ind() then rejects new children once cleanup starts.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b7ce436a5d798bc59e71797952566608a4b4626b before eb4adaa46e4c9e6efa7be3ce06398f4d7c39b57c; affected b7ce436a5d798bc59e71797952566608a4b4626b before 4aafb47301a799d3e01230d6568c4e93524e1523; affected b7ce436a5d798bc59e71797952566608a4b4626b before c741977e413f5b49d306700820fb55ccb8269f5a; affected b7ce436a5d798bc59e71797952566608a4b4626b before c6792c441767256030606eb82dca5d5fc360dd9a; affected b7ce436a5d798bc59e71797952566608a4b4626b before bfce253f039eb5f58b810af267942a9f59207254; affected b7ce436a5d798bc59e71797952566608a4b4626b before 18174b166547ef41973cc19feb5ef9cab39a8def; affected b7ce436a5d798bc59e71797952566608a4b4626b before 801fb950cae7048eb7d83b18857d1ca37b8cd5a4 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/eb4adaa46e4c9e6efa7be3ce06398f4d7c39b57c
- https://git.kernel.org/stable/c/4aafb47301a799d3e01230d6568c4e93524e1523
- https://git.kernel.org/stable/c/c741977e413f5b49d306700820fb55ccb8269f5a
- https://git.kernel.org/stable/c/c6792c441767256030606eb82dca5d5fc360dd9a
- https://git.kernel.org/stable/c/bfce253f039eb5f58b810af267942a9f59207254
- https://git.kernel.org/stable/c/18174b166547ef41973cc19feb5ef9cab39a8def
- https://git.kernel.org/stable/c/801fb950cae7048eb7d83b18857d1ca37b8cd5a4