Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: s390/cio: Fix device lifecycle handling in css_alloc_subchannel() `css_alloc_subchannel()` calls `device_initialize()` before setting up the DMA masks. If `dma_set_coherent_mask()` or `dma_set_mask()` fails, the error path frees the subchannel structure directly, bypassing the device model reference counting. Once `device_initialize()` has been called, the embedded struct device must be released via `put_device()`, allowing the release callback to free the container structure. Fix the error path by dropping the initial device reference with `put_device()` instead of calling `kfree()` directly. This ensures correct device lifetime handling and avoids potential use-after-free or double-free issues.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e5dcf0025d7af58f525590ac86ac27cb44714e8d before abb6e07f46a740cda4f07d1b561ae4eaa7a1df42; affected e5dcf0025d7af58f525590ac86ac27cb44714e8d before f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424; affected e5dcf0025d7af58f525590ac86ac27cb44714e8d before 6715560527e343a387e4a0d2e6c401748e89fa55; affected e5dcf0025d7af58f525590ac86ac27cb44714e8d before c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603; affected e5dcf0025d7af58f525590ac86ac27cb44714e8d before f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7 |
| Linux / Linux | affected 3.10; unaffected 0 before 3.10; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.14 through 6.18.*; unaffected 6.19.4 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/abb6e07f46a740cda4f07d1b561ae4eaa7a1df42
- https://git.kernel.org/stable/c/f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424
- https://git.kernel.org/stable/c/6715560527e343a387e4a0d2e6c401748e89fa55
- https://git.kernel.org/stable/c/c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603
- https://git.kernel.org/stable/c/f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7