Tracker / CVE-2024-40970
CVE-2024-40970
In the Linux kernel, the following vulnerability has been resolved: Avoid hw_desc array overrun in dw-axi-dmac I have a use case where nr_buffers = 3 and in which each descriptor is composed by 3 segments, resulting in the DMA channel descs_allocated to be 9. Since axi_desc_put() handles the hw_desc considering the descs_allocated, this scenario would result in a kernel panic (hw_desc array will be overrun). To fix this, the proposal is to add a new member to the axi_dma_desc structure, where we keep the number of allocated hw_descs (axi_desc_alloc()) and use it in axi_desc_put() to handle the hw_desc array correctly. Additionally I propose to remove the axi_chan_start_first_queued() call after completing the transfer, since it was identified that unbalance can occur (started descriptors can be interrupted and transfer ignored due to DMA channel not being enabled).
Prodotti e versioni affette
| linux | linux_kernel · … → 5.15.162 |
|---|---|
| linux | linux_kernel · 5.16 → 6.1.96 |
| linux | linux_kernel · 6.2 → 6.6.36 |
| linux | linux_kernel · 6.7 → 6.9.7 |