Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: spi: oc-tiny: switch to managed controller allocation The controller is allocated with the non-managed spi_alloc_host() while the interrupt is registered with devm_request_irq(). During removal, spi_bitbang_stop() only unregisters the controller; the subsequent spi_controller_put() then frees the controller together with its embedded driver-private devdata, which is the IRQ handler's dev_id. The devm_request_irq() release action (free_irq()), which drains the handler, does not run until after .remove() returns. A late or latched interrupt can therefore reach tiny_spi_irq() and dereference already-freed memory (e.g. hw->base). Switch to devm_spi_alloc_host() so that the devres LIFO order releases the controller only after free_irq() has drained the handler, and drop the now-redundant spi_controller_put() from .remove(). The probe error path is simplified to direct returns. This issue was found by an in-house static analysis tool.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ce792580ea2ce6f7259b45124e9ccc4574c31606 before 9265fa8190312b87637def1382d36fc16de3b8e8; affected ce792580ea2ce6f7259b45124e9ccc4574c31606 before 0260c94453a08491640e61f8cf0c384edbe7bd11; affected ce792580ea2ce6f7259b45124e9ccc4574c31606 before ef5cc4a8c088d05549f71950a72b5deff5000fd7; affected ce792580ea2ce6f7259b45124e9ccc4574c31606 before 1cd16c8d68f58e54abb8f331d05469237200631f; affected ce792580ea2ce6f7259b45124e9ccc4574c31606 before d710f43ce30975d197f73c543bfe47b958d8ba17 |
| Linux / Linux | affected 2.6.39; unaffected 0 before 2.6.39; unaffected 6.6.160 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9265fa8190312b87637def1382d36fc16de3b8e8
- https://git.kernel.org/stable/c/0260c94453a08491640e61f8cf0c384edbe7bd11
- https://git.kernel.org/stable/c/ef5cc4a8c088d05549f71950a72b5deff5000fd7
- https://git.kernel.org/stable/c/1cd16c8d68f58e54abb8f331d05469237200631f
- https://git.kernel.org/stable/c/d710f43ce30975d197f73c543bfe47b958d8ba17