[PATCH v2] dma-buf: dma-heap: Add a size check for allocation
From: <hidden>
Date: 2021-12-27 09:52:38
Also in:
dri-devel, linux-media, linux-mediatek, lkml
Subsystem:
dma buffer sharing framework, dma-buf heaps framework, the rest · Maintainers:
Sumit Semwal, Christian König, Linus Torvalds
From: Guangming <redacted>
Add a size check for allcation since the allocation size is
always less than the total DRAM size.
Signed-off-by: Guangming <redacted>
Signed-off-by: jianjiao zeng <redacted>
---
v2: 1. update size limitation as total_dram page size.
2. update commit message
---
drivers/dma-buf/dma-heap.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index 56bf5ad01ad5..e39d2be98d69 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c@@ -55,6 +55,8 @@ static int dma_heap_buffer_alloc(struct dma_heap *heap, size_t len, struct dma_buf *dmabuf; int fd; + if (len / PAGE_SIZE > totalram_pages()) + return -EINVAL; /* * Allocations from all heaps have to begin * and end on page boundaries.
--
2.17.1
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