Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iio: buffer: Tie IIO dma fence lock lifetime to the fence The `iio_dma_fence` implementation currently uses a lock embedded in the `iio_dmabuf_priv`. But the `iio_dma_fence` can outlive the `iio_dmabuf_priv`, which can cause a use-after-free. Tie the lifetime of the lock to the lifetime of the fence by embedding them in the same struct. We can't just hold a reference to the `iio_dmabuf_priv` from the `iio_dma_fence` since `iio_buffer_dmabuf_release()` might sleep and the fence release callback is not allowed to sleep. Note that the `dma_fence` framework now has an internal lock that gets used when the passing `NULL` for `lock` in `dma_fence_init()`, but in order to allow this patch to be backportable use an external lock.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f before 6865d79fca17a80fbd60c12550ca9a5e0e20e0eb; affected 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f before 510497e31be4f241103507315a859e2085ccb081; affected 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f before 8b3e221590181a8beb3735bbabf166df02c839b5; affected 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f before f25ec4627d935dedfb5fe83bd2c2678cdcc19611 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.