[dpdk-dev] [PATCH] app/test: fix array subscript is above array bounds for gcc 4.5

[Tomasz Kulasek]

cc1: warnings being treated as errors
DPDK/app/test/test_cryptodev.c: In function 'test_snow3g_encrypted_authenti
cation.clone.3':
DPDK/x86_64-ivshmem-linuxapp-gcc/include/rte_memcpy.h:796:14: error: array
subscript is above array bounds
compilation terminated due to -Wfatal-errors.


ROOT OF PROBLEM:
----------------

In lines like:

    rte_memcpy(sym_op->cipher.iv.data, iv, iv_len);

when "iv" is 64 bytes long array, and "iv_len" is "unsigned int",
compiler tries to evaluate also a code for array size larger than 255 bytes
long and reports error "array subscript is above array bounds" in line:

rte_memcpy.h:796

    rte_mov128((uint8_t *)dst + 128, (const uint8_t *)src + 128);

caused by evaluation to:

    rte_mov128((uint8_t *)sym_op->cipher.iv.data + 128, (const uint8_t *)iv
			+ 128);

where "iv" is 64 bytes long buffer and "iv + 128" point out of it, gcc 4.5.


SOLUTION:
---------

Using uint8_t as a size of copied block prevents to evaluate in rte_memcpy
code for size bigger than 255, causing the problem.


Signed-off-by: Tomasz Kulasek <tomaszx.kulasek at intel.com>
---
 app/test/test_cryptodev.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/app/test/test_cryptodev.c b/app/test/test_cryptodev.c
index 0c26804..8e8da98 100644
--- a/app/test/test_cryptodev.c
+++ b/app/test/test_cryptodev.c
@@ -2362,10 +2362,10 @@ create_snow3g_hash_operation(const uint8_t *auth_tag,
 static int
 create_snow3g_cipher_hash_operation(const uint8_t *auth_tag,
 		const unsigned auth_tag_len,
-		const uint8_t *aad, const unsigned aad_len,
+		const uint8_t *aad, const uint8_t aad_len,
 		unsigned data_pad_len,
 		enum rte_crypto_auth_operation op,
-		const uint8_t *iv, const unsigned iv_len,
+		const uint8_t *iv, const uint8_t iv_len,
 		const unsigned cipher_len, const unsigned cipher_offset,
 		const unsigned auth_len, const unsigned auth_offset)
 {
@@ -2460,8 +2460,8 @@ create_snow3g_cipher_hash_operation(const uint8_t *auth_tag,
 
 static int
 create_snow3g_auth_cipher_operation(const unsigned auth_tag_len,
-		const uint8_t *iv, const unsigned iv_len,
-		const uint8_t *aad, const unsigned aad_len,
+		const uint8_t *iv, const uint8_t iv_len,
+		const uint8_t *aad, const uint8_t aad_len,
 		unsigned data_pad_len,
 		const unsigned cipher_len, const unsigned cipher_offset,
 		const unsigned auth_len, const unsigned auth_offset)
-- 
1.7.9.5