[dpdk-dev] [PATCH] app/test: fix array subscript is above array bounds for gcc 4.5
Tomasz Kulasek
tomaszx.kulasek at intel.com
Thu Apr 7 15:07:30 CEST 2016
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
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