Commit 3fa6456e authored by Binglei Wang's avatar Binglei Wang Committed by Christoph Hellwig
Browse files

dma-contiguous: check for memory region overlap 



In the process of parsing the DTS, check whether the memory region
specified by the DTS CMA node area overlaps with the kernel text
memory space reserved by memblock before calling
early_init_fdt_scan_reserved_mem.

Signed-off-by: default avatarBinglei Wang <l3b2w1@gmail.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent bf29bfaa

kernel/dma/contiguous.c

+5 −0
Original line number Diff line number Diff line
@@ -473,6 +473,11 @@ static int __init rmem_cma_setup(struct reserved_mem *rmem) 
		return -EBUSY;

	}



	if (memblock_is_region_reserved(rmem->base, rmem->size)) {

		pr_info("Reserved memory: overlap with other memblock reserved region\n");

		return -EBUSY;

	}



	if (!of_get_flat_dt_prop(node, "reusable", NULL) ||

	    of_get_flat_dt_prop(node, "no-map", NULL))

		return -EINVAL;