Commit 182caa19 authored Apr 18, 2017 by Charan Teja Reddy

arm: dma-mapping: set the proper bitmap size

Set the size of bitmap area properly to ensure the proper iova address
to be returned by the bitmap_() API's through alloc_iova(). The current
implementation causes the bitmap index search out of bounds of a page
which can lead to the randomn corruption issues.

Change-Id: Ie57ca0b7465c91d318145ed270b7d47d822c8eeb
Fixes:I88ddd98a76b ("arm/arm64: dma-mapping: Fix iova region size")
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>

parent 26db1949

arch/arm/mm/dma-mapping.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2074,7 +2074,7 @@ arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size)
		mapping->nr_bitmaps = 1;
		mapping->extensions = extensions;
		mapping->base = base;
		mapping->bits = bits;
		mapping->bits = BITS_PER_BYTE * bitmap_size;

		spin_lock_init(&mapping->lock);