On Mon, Apr 25, 2022 at 04:51:54PM +0100, Lee Jones wrote:

Supply additional check in order to prevent unexpected results.

Fixes: b892bf75b2034 ("ion: Switch ion to use dma-buf") Suggested-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Lee Jones lee.jones@linaro.org

---

This is a forward-port from linux-4.4.y and linux-4.9.y.

It has never been upstream.

Please apply to v4.14 through v5.10.

drivers/staging/android/ion/ion.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index e1fe03ceb7f13..e6d4a3ee6cda5 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -114,6 +114,9 @@ static void *ion_buffer_kmap_get(struct ion_buffer *buffer) void *vaddr; if (buffer->kmap_cnt) {

• if (buffer->kmap_cnt == INT_MAX)
  

• 	return ERR_PTR(-EOVERFLOW);
  

• buffer->kmap_cnt++; return buffer->vaddr; }

-- 2.36.0.rc2.479.g8af0fa9b8e-goog

Now queued up, thanks.

gre gk-h