From: <guangming.cao@mediatek.com>
To: "Sumit Semwal" <sumit.semwal@linaro.org>,
"Benjamin Gaignard" <benjamin.gaignard@linaro.org>,
"Liam Mark" <lmark@codeaurora.org>,
"Laura Abbott" <labbott@redhat.com>,
"Brian Starkey" <Brian.Starkey@arm.com>,
"John Stultz" <john.stultz@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"Matthias Brugger" <matthias.bgg@gmail.com>,
"open list:DMA-BUF HEAPS FRAMEWORK" <linux-media@vger.kernel.org>,
"open list:DMA-BUF HEAPS FRAMEWORK"
<dri-devel@lists.freedesktop.org>,
"moderated list:DMA-BUF HEAPS FRAMEWORK"
<linaro-mm-sig@lists.linaro.org>,
"open list" <linux-kernel@vger.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>
Cc: Bo Song <bo.song@mediatek.com>,
Libo Kang <libo.kang@mediatek.com>,
jianjiao zeng <jianjiao.zeng@mediatek.com>,
mingyuan ma <mingyuan.ma@mediatek.com>,
Yunfei Wang <yf.wang@mediatek.com>, <wsd_upstream@mediatek.com>,
Guangming <Guangming.Cao@mediatek.com>
Subject: [PATCH v2] dma-buf: dma-heap: Add a size check for allocation
Date: Mon, 27 Dec 2021 17:51:02 +0800 [thread overview]
Message-ID: <20211227095102.6054-1-guangming.cao@mediatek.com> (raw)
In-Reply-To: <20211217094104.24977-1-guangming.cao@mediatek.com>
From: Guangming <Guangming.Cao@mediatek.com>
Add a size check for allcation since the allocation size is
always less than the total DRAM size.
Signed-off-by: Guangming <Guangming.Cao@mediatek.com>
Signed-off-by: jianjiao zeng <jianjiao.zeng@mediatek.com>
---
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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next prev parent reply other threads:[~2021-12-27 9:53 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-17 9:41 [PATCH] dma-buf: dma-heap: Add a size limitation for allocation guangming.cao
2021-12-27 9:51 ` guangming.cao [this message]
2022-01-03 18:57 ` [PATCH v2] dma-buf: dma-heap: Add a size check " John Stultz
2022-01-04 7:47 ` Christian König
2022-01-04 8:44 ` Guangming.Cao
2022-01-05 6:36 ` guangming.cao
2022-01-13 10:50 ` Sumit Semwal
2022-01-13 12:34 ` [PATCH v3] " guangming.cao
2022-01-13 12:57 ` Ruhl, Michael J
2022-01-13 13:00 ` Ruhl, Michael J
2022-01-13 13:05 ` Christian König
2022-01-13 23:26 ` John Stultz
2022-01-14 7:16 ` Christian König
2022-01-14 12:05 ` Guangming.Cao
2022-01-15 1:17 ` John Stultz
2022-01-19 9:59 ` Guangming.Cao
2022-01-19 20:37 ` John Stultz
2022-01-20 3:34 ` [PATCH v4] dma-buf: system_heap: " guangming.cao
2022-01-20 3:48 ` John Stultz
2022-01-20 7:08 ` [PATCH v5] " guangming.cao
2022-01-20 8:27 ` Christian König
2022-01-20 8:52 ` [PATCH v6] " guangming.cao
2022-01-20 10:00 ` [PATCH v6 RESEND] " guangming.cao
2022-01-20 10:22 ` Christian König
2021-12-27 9:47 [PATCH v2] dma-buf: dma-heap: " guangming.cao
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