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-rw-r--r--crypto/algapi.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c
index 849254d7e627..f1e6ccaff853 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -716,17 +716,27 @@ EXPORT_SYMBOL_GPL(crypto_drop_spawn);
static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
{
- struct crypto_alg *alg;
+ struct crypto_alg *alg = ERR_PTR(-EAGAIN);
+ struct crypto_alg *target;
+ bool shoot = false;
down_read(&crypto_alg_sem);
- alg = spawn->alg;
- if (!spawn->dead && !crypto_mod_get(alg)) {
- alg->cra_flags |= CRYPTO_ALG_DYING;
- alg = NULL;
+ if (!spawn->dead) {
+ alg = spawn->alg;
+ if (!crypto_mod_get(alg)) {
+ target = crypto_alg_get(alg);
+ shoot = true;
+ alg = ERR_PTR(-EAGAIN);
+ }
}
up_read(&crypto_alg_sem);
- return alg ?: ERR_PTR(-EAGAIN);
+ if (shoot) {
+ crypto_shoot_alg(target);
+ crypto_alg_put(target);
+ }
+
+ return alg;
}
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,