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crypto: algapi - make crypto_grab_spawn() handle an ERR_PTR() name

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To allow further simplifying template ->create() functions, make
crypto_grab_spawn() handle an ERR_PTR() name by passing back the error.

For most templates, this will allow the result of crypto_attr_alg_name()
to be passed directly to crypto_grab_*(), rather than first having to
assign it to a variable [where it can then potentially be misused, as it
was in the rfc7539 template prior to commit 5e27f38f1f ("crypto:
chacha20poly1305 - set cra_name correctly")] and check it for error.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2020-01-02 19:58:42 -08:00 committed by Herbert Xu
parent ff67062796
commit ca94e9374a
1 changed files with 4 additions and 0 deletions
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4
crypto/algapi.c
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@ -720,6 +720,10 @@ int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
struct crypto_alg *alg;
int err;
/* Allow the result of crypto_attr_alg_name() to be passed directly */
if (IS_ERR(name))
return PTR_ERR(name);
alg = crypto_find_alg(name, spawn->frontend, type, mask);
if (IS_ERR(alg))
return PTR_ERR(alg);