diff options
| author | Lee Jones <lee.jones@linaro.org> | 2022-04-25 16:51:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 13:53:57 +0200 |
| commit | fea24b07edfc348c67a019b6e17b39c0698e631f (patch) | |
| tree | 8760be16732397982116549f69ed95ad79759edc | |
| parent | dccee748af17fc087ff5017152e532ef8e18c8c0 (diff) | |
staging: ion: Prevent incorrect reference counting behavour
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/android/ion/ion.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index e1fe03ceb7f1..e6d4a3ee6cda 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; } |