* [PATCH AUTOSEL 5.15 02/15] udmabuf: fix a buf size overflow issue during udmabuf creation
[not found] <20250414133126.680846-1-sashal@kernel.org>
@ 2025-04-14 13:31 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2025-04-14 13:31 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Xiaogang Chen, Xiaogang Chen, Christian König, Sasha Levin,
kraxel, vivek.kasireddy, sumit.semwal, dri-devel, linux-media,
linaro-mm-sig
From: Xiaogang Chen <xiaogang.chen@amd.com>
[ Upstream commit 021ba7f1babd029e714d13a6bf2571b08af96d0f ]
by casting size_limit_mb to u64 when calculate pglimit.
Signed-off-by: Xiaogang Chen<Xiaogang.Chen@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250321164126.329638-1-xiaogang.chen@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/dma-buf/udmabuf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index a8094d57d2d06..84f7611c765b9 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -186,7 +186,7 @@ static long udmabuf_create(struct miscdevice *device,
if (!ubuf)
return -ENOMEM;
- pglimit = (size_limit_mb * 1024 * 1024) >> PAGE_SHIFT;
+ pglimit = ((u64)size_limit_mb * 1024 * 1024) >> PAGE_SHIFT;
for (i = 0; i < head->count; i++) {
if (!IS_ALIGNED(list[i].offset, PAGE_SIZE))
goto err;
--
2.39.5
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