Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: io-wq: check for wq exit after adding new worker task_work We check IO_WQ_BIT_EXIT before attempting to create a new worker, and wq exit cancels pending work if we have any. But it's possible to have a race between the two, where creation checks exit finding it not set, but we're in the process of exiting. The exit side will cancel pending creation task_work, but there's a gap where we add task_work after we've canceled existing creations at exit time. Fix this by checking the EXIT bit post adding the creation task_work. If it's set, run the same cancelation that exit does.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 685fe7feedb96771683437107ba72131410e2350 before 4b4e5bbf9386d4ec21d91c0cb0fd60b9bba778ec; affected 685fe7feedb96771683437107ba72131410e2350 before 71a85387546e50b1a37b0fa45dadcae3bfb35cf6 |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 5.15.11 through 5.15.*; unaffected 5.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4b4e5bbf9386d4ec21d91c0cb0fd60b9bba778ec
- https://git.kernel.org/stable/c/71a85387546e50b1a37b0fa45dadcae3bfb35cf6
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.