staging: android: ion: Return an ERR_PTR in ion_map_kernel
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>
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@ -30,7 +30,7 @@ void *ion_heap_map_kernel(struct ion_heap *heap,
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struct page **tmp = pages;
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if (!pages)
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return NULL;
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return ERR_PTR(-ENOMEM);
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if (buffer->flags & ION_FLAG_CACHED)
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pgprot = PAGE_KERNEL;
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