From 6bc22eceecb6629335a5442cbec769a2629428eb Mon Sep 17 00:00:00 2001 From: Liam Mark Date: Wed, 15 Feb 2017 13:52:48 -0800 Subject: [PATCH] drivers: dma-removed: page align size on free Fix removed ops memory leak which occurs when non-page aligned memory is freed. On free we need to page align the amount of memory being freed otherwise we risk rounding down the size of the allocation to the page boundary which would leak one page. Change-Id: Idabce39cad526eeaf073748edb227b2edd76f40e Signed-off-by: Liam Mark --- drivers/base/dma-removed.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/base/dma-removed.c b/drivers/base/dma-removed.c index 87c743995a50..5fa3c6bdeea0 100644 --- a/drivers/base/dma-removed.c +++ b/drivers/base/dma-removed.c @@ -1,6 +1,6 @@ /* * - * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. + * Copyright (c) 2013-2017, The Linux Foundation. All rights reserved. * Copyright (C) 2000-2004 Russell King * * This program is free software; you can redistribute it and/or modify @@ -296,6 +296,7 @@ void removed_free(struct device *dev, size_t size, void *cpu_addr, attrs); struct removed_region *dma_mem = dev->removed_mem; + size = PAGE_ALIGN(size); if (!no_kernel_mapping) iounmap(cpu_addr); mutex_lock(&dma_mem->lock);