[PATCH] cryptodev: avoid algorithm strings null pointers

[xixin.liu]

The crypto algorithm strings identifiers that are Continuous may be null,
so there is needed to add null judgment.
When testing with dpdk-test-crypto-perf and passing in the parameter
--auth-algo sm3-hmac, The program caused a segfault due to a null pointer
passed in by strcmp.
Adding this patch can solve the segfault problem.
---
 lib/cryptodev/rte_cryptodev.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/cryptodev/rte_cryptodev.c b/lib/cryptodev/rte_cryptodev.c
index a96114b2da..d325133319 100644
--- a/lib/cryptodev/rte_cryptodev.c
+++ b/lib/cryptodev/rte_cryptodev.c
@@ -346,6 +346,8 @@ rte_cryptodev_get_cipher_algo_enum(enum 
rte_crypto_cipher_algorithm *algo_enum,
        int ret = -1;   /* Invalid string */
 
        for (i = 1; i < RTE_DIM(crypto_cipher_algorithm_strings); i++) {
+               if (crypto_cipher_algorithm_strings[i] == NULL)
+                       continue;
                if (strcmp(algo_string, crypto_cipher_algorithm_strings[i]) == 
0) {
                        *algo_enum = (enum rte_crypto_cipher_algorithm) i;
                        ret = 0;
@@ -366,6 +368,8 @@ rte_cryptodev_get_auth_algo_enum(enum 
rte_crypto_auth_algorithm *algo_enum,
        int ret = -1;   /* Invalid string */
 
        for (i = 1; i < RTE_DIM(crypto_auth_algorithm_strings); i++) {
+               if (crypto_auth_algorithm_strings[i] == NULL)
+                       continue;
                if (strcmp(algo_string, crypto_auth_algorithm_strings[i]) == 0) 
{
                        *algo_enum = (enum rte_crypto_auth_algorithm) i;
                        ret = 0;
@@ -386,6 +390,8 @@ rte_cryptodev_get_aead_algo_enum(enum 
rte_crypto_aead_algorithm *algo_enum,
        int ret = -1;   /* Invalid string */
 
        for (i = 1; i < RTE_DIM(crypto_aead_algorithm_strings); i++) {
+               if (crypto_aead_algorithm_strings[i] == NULL）
+                       continue;
                if (strcmp(algo_string, crypto_aead_algorithm_strings[i]) == 0) 
{
                        *algo_enum = (enum rte_crypto_aead_algorithm) i;
                        ret = 0;
@@ -406,6 +412,8 @@ rte_cryptodev_asym_get_xform_enum(enum 
rte_crypto_asym_xform_type *xform_enum,
        int ret = -1;   /* Invalid string */
 
        for (i = 1; i < RTE_DIM(crypto_asym_xform_strings); i++) {
+               if (crypto_asym_xform_strings[i] = NULL)
+                       continue;
                if (strcmp(xform_string,
                        crypto_asym_xform_strings[i]) == 0) {
                        *xform_enum = (enum rte_crypto_asym_xform_type) i;
-- 
2.34.1