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

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[ Upstream commit 270b6f13454cb7f2f7058c50df64df409c5dcf55 ]

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: f1c131b454 ("crypto: xts - Convert to skcipher")
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 16:34:04 +08:00
committed by Greg Kroah-Hartman
parent ba2af6855c
commit 04a39a3c7d
1 changed files with 2 additions and 2 deletions
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4
crypto/xts.c
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@@ -363,7 +363,7 @@ static int xts_create(struct crypto_template *tmpl, struct rtattr **tb)
err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
cipher_name, 0, mask);
if (err == -ENOENT) {
if (err == -ENOENT && memcmp(cipher_name, "ecb(", 4)) {
err = -ENAMETOOLONG;
if (snprintf(name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
cipher_name) >= CRYPTO_MAX_ALG_NAME)
@@ -397,7 +397,7 @@ static int xts_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(name, cipher_name + 4, sizeof(name));