5.10-stable review patch. If anyone has any objections, please let me know.
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From: Herbert Xu herbert@gondor.apana.org.au
[ 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: f1c131b45410 ("crypto: xts - Convert to skcipher") Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- crypto/xts.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/crypto/xts.c b/crypto/xts.c index 74dc199d54867..a4677e1a1611f 100644 --- a/crypto/xts.c +++ b/crypto/xts.c @@ -360,7 +360,7 @@ 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(ctx->name, CRYPTO_MAX_ALG_NAME, "ecb(%s)", cipher_name) >= CRYPTO_MAX_ALG_NAME) @@ -394,7 +394,7 @@ 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(ctx->name, cipher_name + 4, sizeof(ctx->name));