The heuristics used by gcc triggers false positive truncation warnings in hifn_alg_alloc. The warning triggered by the strings here are clearly false positives (see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95755). 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@xxxxxxxxxxxxxxxxxxx> diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c index 8e4a49b7ab4f..7bddc3c786c1 100644 --- a/drivers/crypto/hifn_795x.c +++ b/drivers/crypto/hifn_795x.c @@ -2393,9 +2393,13 @@ static int hifn_alg_alloc(struct hifn_device *dev, const struct hifn_alg_templat alg->alg = t->skcipher; alg->alg.init = hifn_init_tfm; - snprintf(alg->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", t->name); - snprintf(alg->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-%s", - t->drv_name, dev->name); + err = -EINVAL; + if (snprintf(alg->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, + "%s", t->name) >= CRYPTO_MAX_ALG_NAME) + goto out_free_alg; + if (snprintf(alg->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, + "%s-%s", t->drv_name, dev->name) >= CRYPTO_MAX_ALG_NAME) + goto out_free_alg; alg->alg.base.cra_priority = 300; alg->alg.base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC; @@ -2411,6 +2415,7 @@ static int hifn_alg_alloc(struct hifn_device *dev, const struct hifn_alg_templat err = crypto_register_skcipher(&alg->alg); if (err) { list_del(&alg->entry); +out_free_alg: kfree(alg); } -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
