The expected return value from ion_map_kernel is an ERR_PTR. The error
path for a vmalloc failure currently just returns NULL, triggering
a warning in ion_buffer_kmap_get. Encode the vmalloc failure as an ERR_PTR.
Reported-by: syzbot+55b1d9f811650de94...@syzkaller.appspotmail.com
Signed-off-by: Laura Abbott <labb...@redhat.com>
---
drivers/staging/android/ion/ion_heap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/android/ion/ion_heap.c
b/drivers/staging/android/ion/ion_heap.c
index 772dad65396e..f32c12439eee 100644
--- a/drivers/staging/android/ion/ion_heap.c
+++ b/drivers/staging/android/ion/ion_heap.c
@@ -29,7 +29,7 @@ void *ion_heap_map_kernel(struct ion_heap *heap,
struct page **tmp = pages;
if (!pages)
- return NULL;
+ return ERR_PTR(-ENOMEM);
if (buffer->flags & ION_FLAG_CACHED)
pgprot = PAGE_KERNEL;
--
2.17.0
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