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staging: android: ion: Return an ERR_PTR in ion_map_kernel

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commit 0a2bc00341 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>
This commit is contained in:
Laura Abbott
2018-06-11 11:06:53 -07:00
committed by Greg Kroah-Hartman
parent a1f75c3f3a
commit 58fcaeb30e
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/android/ion/ion_heap.c
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@@ -38,7 +38,7 @@ 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;