4.4-stable review patch. If anyone has any objections, please let me know.
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From: Laura Abbott labbott@redhat.com
commit 0a2bc00341dcfcc793c0dbf4f8d43adf60458b05 upstream.
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+55b1d9f811650de944c6@syzkaller.appspotmail.com Signed-off-by: Laura Abbott labbott@redhat.com Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/staging/android/ion/ion_heap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/staging/android/ion/ion_heap.c +++ b/drivers/staging/android/ion/ion_heap.c @@ -38,7 +38,7 @@ void *ion_heap_map_kernel(struct ion_hea struct page **tmp = pages;
if (!pages) - return NULL; + return ERR_PTR(-ENOMEM);
if (buffer->flags & ION_FLAG_CACHED) pgprot = PAGE_KERNEL;