cve-2024-40970
Vulnerability from cvelistv5
Published
2024-07-12 12:32
Modified
2024-11-05 09:34
Severity ?
Summary
Avoid hw_desc array overrun in dw-axi-dmac
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/333e11bf47fa8d477db90e2900b1ed3c9ae9b697Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9004784e8d68bcd1ac1376407ba296fa28f04dbePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd42570018f5962c10f215ad9c21274ed5d3541ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/333e11bf47fa8d477db90e2900b1ed3c9ae9b697Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9004784e8d68bcd1ac1376407ba296fa28f04dbePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dd42570018f5962c10f215ad9c21274ed5d3541ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66Patch
Impacted products
Vendor Product Version
Linux Linux
Show details on NVD website

To clipboard 

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Since axi_desc_put()\\nhandles the hw_desc considering the descs_allocated, this scenario would result in a\\nkernel panic (hw_desc array will be overrun).\\n\\nTo fix this, the proposal is to add a new member to the axi_dma_desc structure,\\nwhere we keep the number of allocated hw_descs (axi_desc_alloc()) and use it in\\naxi_desc_put() to handle the hw_desc array correctly.\\n\\nAdditionally I propose to remove the axi_chan_start_first_queued() call after completing\\nthe transfer, since it was identified that unbalance can occur (started descriptors can\\nbe interrupted and transfer ignored due to DMA channel not being enabled).\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Evitar la saturaci\u00f3n de la matriz hw_desc en dw-axi-dmac. Tengo un caso de uso donde nr_buffers = 3 y en el que cada descriptor est\u00e1 compuesto por 3 segmentos, lo que da como resultado que el canal DMA descs_allocated sea 9. 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