dmaengine: ti: edma: Fix memory allocation size for queue_priority_map

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: edma: Fix memory allocation size for queue_priority_map Fix a critical memory allocation bug in edma_setup_from_hw() where queue_priority_map was allocated with insufficient memory. The code declared queue_priority_map as s8 (*)[2] (pointer to array of 2 s8), but allocated memory using sizeof(s8) instead of the correct size. This caused out-of-bounds memory writes when accessing: queue_priority_map[i][0] = i; queue_priority_map[i][1] = i; The bug manifested as kernel crashes with "Oops - undefined instruction" on ARM platforms (BeagleBoard-X15) during EDMA driver probe, as the memory corruption triggered kernel hardening features on Clang. Change the allocation to use sizeof(*queue_priority_map) which automatically gets the correct size for the 2D array structure.

References

• https://git.kernel.org/stable/c/7d4de60d6db02d9b01d5890d5156b04fad65d07a
• https://git.kernel.org/stable/c/d722de80ce037dccf6931e778f4a46499d51bdf9
• https://git.kernel.org/stable/c/301a96cc4dc006c9a285913d301e681cfbf7edb6
• https://git.kernel.org/stable/c/5e462fa0dfdb52b3983cf41532d3d4c7d63e2f93
• https://git.kernel.org/stable/c/1baed10553fc8b388351d8fc803e3ae6f1a863bc
• https://git.kernel.org/stable/c/069fd1688c57c0cc8a3de64d108579b31676f74b
• https://git.kernel.org/stable/c/d5e82f3f2c918d446df46e8d65f8083fd97cdec5
• https://git.kernel.org/stable/c/e63419dbf2ceb083c1651852209c7f048089ac0f