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authorEric Biggers <ebiggers@google.com>2020-01-02 19:58:45 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2020-01-09 11:30:54 +0800
commitb9f76dddb1f9f70e008b982381bbc9a67c9b8c66 (patch)
tree329d8484b8eace9777db4e9965b02372c79e1a9f /crypto/lrw.c
parent77f7e94d72208a1a84c88ed4de16a9bf368e9ded (diff)
downloadlinux-b9f76dddb1f9f70e008b982381bbc9a67c9b8c66.tar.bz2
crypto: skcipher - pass instance to crypto_grab_skcipher()
Initializing a crypto_skcipher_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_skcipher(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_skcipher() take the instance as an argument. To keep the function calls from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into the affected places which weren't already using one. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/lrw.c')
-rw-r--r--crypto/lrw.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/crypto/lrw.c b/crypto/lrw.c
index 8ebd79276c78..63c485c0d8a6 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -301,6 +301,7 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
struct skcipher_alg *alg;
const char *cipher_name;
char ecb_name[CRYPTO_MAX_ALG_NAME];
+ u32 mask;
int err;
algt = crypto_get_attr_type(tb);
@@ -310,6 +311,8 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
cipher_name = crypto_attr_alg_name(tb[1]);
if (IS_ERR(cipher_name))
return PTR_ERR(cipher_name);
@@ -320,19 +323,17 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
spawn = skcipher_instance_ctx(inst);
- crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst));
- err = crypto_grab_skcipher(spawn, cipher_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(spawn, skcipher_crypto_instance(inst),
+ cipher_name, 0, mask);
if (err == -ENOENT) {
err = -ENAMETOOLONG;
if (snprintf(ecb_name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
cipher_name) >= CRYPTO_MAX_ALG_NAME)
goto err_free_inst;
- err = crypto_grab_skcipher(spawn, ecb_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(spawn,
+ skcipher_crypto_instance(inst),
+ ecb_name, 0, mask);
}
if (err)