@@ -1404,8 +1404,12 @@ static int __n2_register_one_hmac(struct n2_ahash_alg *n2ahash)
ahash->setkey = n2_hmac_async_setkey;
base = &ahash->halg.base;
- snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", p->child_alg);
- snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "hmac-%s-n2", p->child_alg);
+ if (snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
+ p->child_alg) >= CRYPTO_MAX_ALG_NAME)
+ goto out_free_p;
+ if (snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "hmac-%s-n2",
+ p->child_alg) >= CRYPTO_MAX_ALG_NAME)
+ goto out_free_p;
base->cra_ctxsize = sizeof(struct n2_hmac_ctx);
base->cra_init = n2_hmac_cra_init;
@@ -1416,6 +1420,7 @@ static int __n2_register_one_hmac(struct n2_ahash_alg *n2ahash)
if (err) {
pr_err("%s alg registration failed\n", base->cra_name);
list_del(&p->derived.entry);
+out_free_p:
kfree(p);
} else {
pr_info("%s alg registered\n", base->cra_name);
The heuristics used by gcc triggers false positive truncation warnings in hifn_alg_alloc. Add checks on snprintf calls to silence these warnings, including the one for cra_driver_name even though it does not currently trigger a gcc warning. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>