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).
Weaknesses
- CVE Status
- PUBLISHED
- NVD Status
- Analyzed
- CNA
- kernel.org
- Published Date
-
2024-07-12 13:15:18
(2 months ago) - Updated Date
-
2024-09-09 18:07:59
(9 days ago)
Affected Products
Configuration #1
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