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udmabuf: fix a buf size overflow issue during udmabuf creation

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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>
This commit is contained in:
Xiaogang Chen
2025-03-21 11:41:26 -05:00
committed by Christian König
parent cb83f4b965
commit 021ba7f1ba
1 changed files with 1 additions and 1 deletions
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2
drivers/dma-buf/udmabuf.c
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@@ -393,7 +393,7 @@ 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++) {
pgoff_t subpgcnt;