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crypto: lrw - Only add ecb if it is not already there

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[ Upstream commit 3d73909bdd ]

Only add ecb to the cipher name if it isn't already ecb.

Also use memcmp instead of strncmp since these strings are all
stored in an array of length CRYPTO_MAX_ALG_NAME.

Fixes: 700cb3f5fe ("crypto: lrw - Convert to skcipher")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202505151503.d8a6cf10-lkp@intel.com
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Herbert Xu 2025-05-15 16:28:08 +08:00 committed by Greg Kroah-Hartman
parent ec91ab135c
commit ba2af6855c
1 changed files with 2 additions and 2 deletions
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4
crypto/lrw.c
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@ -322,7 +322,7 @@ static int lrw_create(struct crypto_template *tmpl, struct rtattr **tb)
err = crypto_grab_skcipher(spawn, skcipher_crypto_instance(inst),
cipher_name, 0, mask);
if (err == -ENOENT) {
if (err == -ENOENT && memcmp(cipher_name, "ecb(", 4)) {
err = -ENAMETOOLONG;
if (snprintf(ecb_name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
cipher_name) >= CRYPTO_MAX_ALG_NAME)
@ -356,7 +356,7 @@ static int lrw_create(struct crypto_template *tmpl, struct rtattr **tb)
/* Alas we screwed up the naming so we have to mangle the
* cipher name.
*/
if (!strncmp(cipher_name, "ecb(", 4)) {
if (!memcmp(cipher_name, "ecb(", 4)) {
int len;
len = strscpy(ecb_name, cipher_name + 4, sizeof(ecb_name));