Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: dmaengine: zynqmp_dma: In struct zynqmp_dma_chan fix desc_size data type In zynqmp_dma_alloc/free_chan_resources functions there is a potential overflow in the below expressions. dma_alloc_coherent(chan->dev, (2 * chan->desc_size * ZYNQMP_DMA_NUM_DESCS), &chan->desc_pool_p, GFP_KERNEL); dma_free_coherent(chan->dev,(2 * ZYNQMP_DMA_DESC_SIZE(chan) * ZYNQMP_DMA_NUM_DESCS), chan->desc_pool_v, chan->desc_pool_p); The arguments desc_size and ZYNQMP_DMA_NUM_DESCS were 32 bit. Though this overflow condition is not observed but it is a potential problem in the case of 32-bit multiplication. Hence fix it by changing the desc_size data type to size_t. In addition to coverity fix it also reuse ZYNQMP_DMA_DESC_SIZE macro in dma_alloc_coherent API argument. Addresses-Coverity: Event overflow_before_widen.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b0cc417c1637192be658e68a74c8d1568e3d35f6 before 83960276ffc9bf5570d4106490346b61e61be5f3; affected b0cc417c1637192be658e68a74c8d1568e3d35f6 before 95a0ba85c1b51b36e909841c02d205cd223ab753; affected b0cc417c1637192be658e68a74c8d1568e3d35f6 before 7b5488f4721fed6e121e661e165bab06ae2f8675; affected b0cc417c1637192be658e68a74c8d1568e3d35f6 before 4838969e4d95d2bd2995d1605b20d3144fcb3e74; affected b0cc417c1637192be658e68a74c8d1568e3d35f6 before 90aefae2e3a770a6909d339f5d8a988c0b0ceaf0; affected b0cc417c1637192be658e68a74c8d1568e3d35f6 before f9a9f43a62a04ec3183fb0da9226c7706eed0115 |
| Linux / Linux | affected 4.8; unaffected 0 before 4.8; unaffected 5.4.198 through 5.4.*; unaffected 5.10.122 through 5.10.*; unaffected 5.15.47 through 5.15.*; unaffected 5.17.15 through 5.17.*; unaffected 5.18.4 through 5.18.*; unaffected 5.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/83960276ffc9bf5570d4106490346b61e61be5f3
- https://git.kernel.org/stable/c/95a0ba85c1b51b36e909841c02d205cd223ab753
- https://git.kernel.org/stable/c/7b5488f4721fed6e121e661e165bab06ae2f8675
- https://git.kernel.org/stable/c/4838969e4d95d2bd2995d1605b20d3144fcb3e74
- https://git.kernel.org/stable/c/90aefae2e3a770a6909d339f5d8a988c0b0ceaf0
- https://git.kernel.org/stable/c/f9a9f43a62a04ec3183fb0da9226c7706eed0115