CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's DMA engine, specifically in the rz-dmac driver, where the interrupt request is made before the necessary initialization is complete. This can lead to invalid memory access and potential exposure to uninitialized data, resulting in system instability or crashes. Organizations utilizing Linux systems with this kernel component should prioritize addressing this vulnerability to ensure system integrity and reliability.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: sh: rz-dmac: Move interrupt request after everything is set up Once the interrupt is requested, the interrupt handler may run immediately. Since the IRQ handler can access channel->ch_base, which is initialized only after requesting the IRQ, this may lead to invalid memory access. Likewise, the IRQ thread may access uninitialized data (the ld_free, ld_queue, and ld_active lists), which may also lead to issues. Request the interrupts only after everything is set up. To keep the error path simpler, use dmam_alloc_coherent() instead of dma_alloc_coherent().