CVE-2025-39869

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.

This vulnerability presents minimal risk to Red Hat Enterprise Linux environments because the affected Texas Instruments EDMA driver is not enabled in supported enterprise kernels. Exploitation is constrained to systems utilizing specific Texas Instruments hardware platforms, where driver initialization under certain memory layouts could lead to system instability or denial of service. Because Red Hat product architectures do not ship or support the vulnerable driver code, standard deployments remain unaffected.