From 8328ad0f8274d7e432124d84622c06a286b81177 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Tue, 6 Feb 2018 11:51:18 -0500 Subject: media: rockchip/rga: use 64-bit arithmetic instead of 32-bit Cast p to dma_addr_t in order to avoid a potential integer overflow. This variable is being used in a context that expects an expression of type dma_addr_t (u64). The expression p << PAGE_SHIFT is currently being evaluated using 32-bit arithmetic. Addresses-Coverity-ID: 1458347 ("Unintentional integer overflow") Signed-off-by: Gustavo A. R. Silva Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/rockchip/rga/rga-buf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/media/platform/rockchip/rga') diff --git a/drivers/media/platform/rockchip/rga/rga-buf.c b/drivers/media/platform/rockchip/rga/rga-buf.c index 49cacc7a48d1..fa1ba98c96dc 100644 --- a/drivers/media/platform/rockchip/rga/rga-buf.c +++ b/drivers/media/platform/rockchip/rga/rga-buf.c @@ -140,7 +140,8 @@ void rga_buf_map(struct vb2_buffer *vb) address = sg_phys(sgl); for (p = 0; p < len; p++) { - dma_addr_t phys = address + (p << PAGE_SHIFT); + dma_addr_t phys = address + + ((dma_addr_t)p << PAGE_SHIFT); pages[mapped_size + p] = phys; } -- cgit v1.2.3