4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Laura Abbott <labbott@xxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx> Cc: stable <stable@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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;
