diff --git a/io_uring/kbuf.c b/io_uring/kbuf.c
index cd1d9dddf58e..79c25459e8de 100644
--- a/io_uring/kbuf.c
+++ b/io_uring/kbuf.c
@@ -491,6 +491,24 @@ static int io_pin_pbuf_ring(struct io_uring_buf_reg *reg,
 		return PTR_ERR(pages);
 
 	br = page_address(pages[0]);
+#ifdef SHM_COLOUR
+	/*
+	 * On platforms that have specific aliasing requirements, SHM_COLOUR
+	 * is set and we must guarantee that the kernel and user side align
+	 * nicely. We cannot do that if IOU_PBUF_RING_MMAP isn't set and
+	 * the application mmap's the provided ring buffer. Fail the request
+	 * if we, by chance, don't end up with aligned addresses. The app
+	 * should use IOU_PBUF_RING_MMAP instead, and liburing will handle
+	 * this transparently.
+	 */
+	if ((reg->ring_addr | (unsigned long) br) & (SHM_COLOUR - 1)) {
+		int i;
+
+		for (i = 0; i < nr_pages; i++)
+			unpin_user_page(pages[i]);
+		return -EINVAL;
+	}
+#endif
 	bl->buf_pages = pages;
 	bl->buf_nr_pages = nr_pages;
 	bl->buf_ring = br;