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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2023-10-12 23:08:17 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-10-20 13:39:26 +0800 |
| commit | ca06ef976ea1cdae363dda508cc9c6502fd0dcd7 (patch) | |
| tree | 971044bcd423c91f3781d7d1dcefbdc885098f7a | |
| parent | 87d6621c07d230d9168a021f2760062f2262e8b9 (diff) | |
| download | lwn-ca06ef976ea1cdae363dda508cc9c6502fd0dcd7.tar.gz lwn-ca06ef976ea1cdae363dda508cc9c6502fd0dcd7.zip | |
crypto: hifn_795x - Silence gcc format-truncation false positive warnings
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@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/hifn_795x.c | 11 |
1 files changed, 8 insertions, 3 deletions
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); } |