[Linaro-mm-sig] Re: [PATCH] udmabuf: fix a buf size overflow issue during udmabuf creation

Am 21.03.25 um 17:41 schrieb Xiaogang.Chen:

From: Xiaogang Chen xiaogang.chen@amd.com

by casting size_limit_mb to u64 when calculate pglimit.

Signed-off-by: Xiaogang ChenXiaogang.Chen@amd.com

Reviewed-by: Christian König christian.koenig@amd.com

If nobody objects I'm going to push that to drm-misc-fixes.

Regards, Christian.

---

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 8ce1f074c2d3..e99e3a65a470 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -398,7 +398,7 @@ 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;