Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Selectively expand io_mutex The io_mutex was defined to serialize the io_regions, but then has also sort of been associated with the I/O themselves because of the close relationship they share. With the handful of races that are possible, the choices are either to: A) expand the scope of io_mutex to close these remaining windows, or B) reduce the scope of io_mutex to just io_region, and introduce a new lock mechanism for the remaining I/O resources This patch implements A, since B brings with it a lot more interactions that would need to be tracked and kept in a correct hierarchy. It also takes advantage of the workqueue element for cp_free() that now gets called out of fsm_notoper(), which could be invoked out of an interrupt context and thus cannot acquire a mutex itself.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4f76617378ee97c557b526cb58d3c61eb0a9c963 before dab6a6627b0b0cce23653e99c7b0bf8c6cfd82e0; affected 4f76617378ee97c557b526cb58d3c61eb0a9c963 before 56d7488533ceac4e986e96e15c9e487a2245bc01; affected 4f76617378ee97c557b526cb58d3c61eb0a9c963 before f72a51810d49411bd8cad0c2df8592320a2fe5cc; affected 4f76617378ee97c557b526cb58d3c61eb0a9c963 before 2ba9efdf9ebedc4e54df4b56aa3b43a65f7967cd; affected 4f76617378ee97c557b526cb58d3c61eb0a9c963 before b6aecea4b2b246f9fbd98a5712daa1193a60818e; affected 4f76617378ee97c557b526cb58d3c61eb0a9c963 before 2a5ac0c0f1f7da33929211a2e41911bf72ee35d8; affected 4f76617378ee97c557b526cb58d3c61eb0a9c963 before 34f4feff3e90bd09308fad0974e97113b23b812a |
| Linux / Linux | affected 5.2; unaffected 0 before 5.2; unaffected 5.15.218 through 5.15.*; unaffected 6.1.185 through 6.1.*; unaffected 6.6.153 through 6.6.*; unaffected 6.12.105 through 6.12.*; unaffected 6.18.46 through 6.18.*; unaffected 7.1.10 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/dab6a6627b0b0cce23653e99c7b0bf8c6cfd82e0
- https://git.kernel.org/stable/c/56d7488533ceac4e986e96e15c9e487a2245bc01
- https://git.kernel.org/stable/c/f72a51810d49411bd8cad0c2df8592320a2fe5cc
- https://git.kernel.org/stable/c/2ba9efdf9ebedc4e54df4b56aa3b43a65f7967cd
- https://git.kernel.org/stable/c/b6aecea4b2b246f9fbd98a5712daa1193a60818e
- https://git.kernel.org/stable/c/2a5ac0c0f1f7da33929211a2e41911bf72ee35d8
- https://git.kernel.org/stable/c/34f4feff3e90bd09308fad0974e97113b23b812a
ADP enrichment
No English description supplied.
No references supplied.