From de95c9574108ec304083ed574304ab3b60b4167c Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 2 Jan 2020 19:58:48 -0800 Subject: [PATCH] crypto: algapi - pass instance to crypto_grab_spawn() Currently, crypto_spawn::inst is first used temporarily to pass the instance to crypto_grab_spawn(). Then crypto_init_spawn() overwrites it with crypto_spawn::next, which shares the same union. Finally, crypto_spawn::inst is set again when the instance is registered. Make this less convoluted by just passing the instance as an argument to crypto_grab_spawn() instead. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu --- crypto/adiantum.c | 6 +++--- crypto/aead.c | 3 +-- crypto/akcipher.c | 3 +-- crypto/algapi.c | 6 +++--- crypto/skcipher.c | 3 +-- include/crypto/algapi.h | 10 ++-------- 6 files changed, 11 insertions(+), 20 deletions(-) diff --git a/crypto/adiantum.c b/crypto/adiantum.c index 567071464fab..76a41881ee8c 100644 --- a/crypto/adiantum.c +++ b/crypto/adiantum.c @@ -542,9 +542,9 @@ static int adiantum_create(struct crypto_template *tmpl, struct rtattr **tb) streamcipher_alg = crypto_spawn_skcipher_alg(&ictx->streamcipher_spawn); /* Block cipher, e.g. "aes" */ - crypto_set_spawn(&ictx->blockcipher_spawn, - skcipher_crypto_instance(inst)); - err = crypto_grab_spawn(&ictx->blockcipher_spawn, blockcipher_name, + err = crypto_grab_spawn(&ictx->blockcipher_spawn, + skcipher_crypto_instance(inst), + blockcipher_name, CRYPTO_ALG_TYPE_CIPHER, CRYPTO_ALG_TYPE_MASK); if (err) goto out_drop_streamcipher; diff --git a/crypto/aead.c b/crypto/aead.c index c7135e00b8ea..02a0db076d7e 100644 --- a/crypto/aead.c +++ b/crypto/aead.c @@ -211,9 +211,8 @@ int crypto_grab_aead(struct crypto_aead_spawn *spawn, struct crypto_instance *inst, const char *name, u32 type, u32 mask) { - spawn->base.inst = inst; spawn->base.frontend = &crypto_aead_type; - return crypto_grab_spawn(&spawn->base, name, type, mask); + return crypto_grab_spawn(&spawn->base, inst, name, type, mask); } EXPORT_SYMBOL_GPL(crypto_grab_aead); diff --git a/crypto/akcipher.c b/crypto/akcipher.c index 84ccf9b02bbe..eeed6c151d2f 100644 --- a/crypto/akcipher.c +++ b/crypto/akcipher.c @@ -94,9 +94,8 @@ int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, struct crypto_instance *inst, const char *name, u32 type, u32 mask) { - spawn->base.inst = inst; spawn->base.frontend = &crypto_akcipher_type; - return crypto_grab_spawn(&spawn->base, name, type, mask); + return crypto_grab_spawn(&spawn->base, inst, name, type, mask); } EXPORT_SYMBOL_GPL(crypto_grab_akcipher); diff --git a/crypto/algapi.c b/crypto/algapi.c index a5223c5f2275..a25ce02918f8 100644 --- a/crypto/algapi.c +++ b/crypto/algapi.c @@ -714,8 +714,8 @@ out: } EXPORT_SYMBOL_GPL(crypto_init_spawn2); -int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, - u32 type, u32 mask) +int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst, + const char *name, u32 type, u32 mask) { struct crypto_alg *alg; int err; @@ -729,7 +729,7 @@ int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, return PTR_ERR(alg); spawn->dropref = true; - err = crypto_init_spawn(spawn, alg, spawn->inst, mask); + err = crypto_init_spawn(spawn, alg, inst, mask); if (err) crypto_mod_put(alg); return err; diff --git a/crypto/skcipher.c b/crypto/skcipher.c index 8759d473a154..15c033c960f7 100644 --- a/crypto/skcipher.c +++ b/crypto/skcipher.c @@ -750,9 +750,8 @@ int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst, const char *name, u32 type, u32 mask) { - spawn->base.inst = inst; spawn->base.frontend = &crypto_skcipher_type; - return crypto_grab_spawn(&spawn->base, name, type, mask); + return crypto_grab_spawn(&spawn->base, inst, name, type, mask); } EXPORT_SYMBOL_GPL(crypto_grab_skcipher); diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index 5022cada4fc6..2779c8d34ba9 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -116,20 +116,14 @@ int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, struct crypto_instance *inst, const struct crypto_type *frontend); -int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, - u32 type, u32 mask); +int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst, + const char *name, u32 type, u32 mask); void crypto_drop_spawn(struct crypto_spawn *spawn); struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, u32 mask); void *crypto_spawn_tfm2(struct crypto_spawn *spawn); -static inline void crypto_set_spawn(struct crypto_spawn *spawn, - struct crypto_instance *inst) -{ - spawn->inst = inst; -} - struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); int crypto_check_attr_type(struct rtattr **tb, u32 type); const char *crypto_attr_alg_name(struct rtattr *rta); -- 2.39.5