[PATCH v5 1/4] test/crypto: fix wireless auth digest segment

[Ciara Power <ciara.power@intel.com>]

The segment size for some tests was too small to hold the auth digest.
This caused issues when using op->sym->auth.digest.data for comparisons
in AESNI_MB PMD after a subsequent patch enables SGL.

For example, if segment size is 2, and digest size is 4, then 4 bytes
are read from op->sym->auth.digest.data, which overflows into the memory
after the segment, rather than using the second segment that contains
the remaining half of the digest.

Fixes: 11c5485bb276 ("test/crypto: add scatter-gather tests for IP and OOP")

Signed-off-by: Ciara Power <ciara.power@intel.com>
Acked-by: Fan Zhang <roy.fan.zhang@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

---
v4: Added failure check when appending digest size to buffer.
---
 app/test/test_cryptodev.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/app/test/test_cryptodev.c b/app/test/test_cryptodev.c
index c6d47a035e..203b8b61fa 100644
--- a/app/test/test_cryptodev.c
+++ b/app/test/test_cryptodev.c
@@ -2990,6 +2990,16 @@ create_wireless_algo_auth_cipher_operation(
 			remaining_off -= rte_pktmbuf_data_len(sgl_buf);
 			sgl_buf = sgl_buf->next;
 		}
+
+		/* The last segment should be large enough to hold full digest */
+		if (sgl_buf->data_len < auth_tag_len) {
+			rte_pktmbuf_free(sgl_buf->next);
+			sgl_buf->next = NULL;
+			TEST_ASSERT_NOT_NULL(rte_pktmbuf_append(sgl_buf,
+					auth_tag_len - sgl_buf->data_len),
+					"No room to append auth tag");
+		}
+
 		sym_op->auth.digest.data = rte_pktmbuf_mtod_offset(sgl_buf,
 				uint8_t *, remaining_off);
 		sym_op->auth.digest.phys_addr = rte_pktmbuf_iova_offset(sgl_buf,
-- 
2.25.1