Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tipc: wait and exit until all work queues are done On some host, a crash could be triggered simply by repeating these commands several times: # modprobe tipc # tipc bearer enable media udp name UDP1 localip 127.0.0.1 # rmmod tipc [] BUG: unable to handle kernel paging request at ffffffffc096bb00 [] Workqueue: events 0xffffffffc096bb00 [] Call Trace: [] ? process_one_work+0x1a7/0x360 [] ? worker_thread+0x30/0x390 [] ? create_worker+0x1a0/0x1a0 [] ? kthread+0x116/0x130 [] ? kthread_flush_work_fn+0x10/0x10 [] ? ret_from_fork+0x35/0x40 When removing the TIPC module, the UDP tunnel sock will be delayed to release in a work queue as sock_release() can't be done in rtnl_lock(). If the work queue is schedule to run after the TIPC module is removed, kernel will crash as the work queue function cleanup_beareri() code no longer exists when trying to invoke it. To fix it, this patch introduce a member wq_count in tipc_net to track the numbers of work queues in schedule, and wait and exit until all work queues are done in tipc_exit_net().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d0f91938bede204a343473792529e0db7d599836 before d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa; affected d0f91938bede204a343473792529e0db7d599836 before 5195ec5e365a2a9331bfeb585b613a6e94f98dba; affected d0f91938bede204a343473792529e0db7d599836 before b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d; affected d0f91938bede204a343473792529e0db7d599836 before 04c26faa51d1e2fe71cf13c45791f5174c37f986 |
| Linux / Linux | affected 4.1; unaffected 0 before 4.1; unaffected 5.4.124 through 5.4.*; unaffected 5.10.42 through 5.10.*; unaffected 5.12.9 through 5.12.*; unaffected 5.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa
- https://git.kernel.org/stable/c/5195ec5e365a2a9331bfeb585b613a6e94f98dba
- https://git.kernel.org/stable/c/b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d
- https://git.kernel.org/stable/c/04c26faa51d1e2fe71cf13c45791f5174c37f986
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.