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authorEric Biggers <ebiggers@google.com>2017-12-29 10:00:46 -0600
committerHerbert Xu <herbert@gondor.apana.org.au>2018-01-05 18:43:09 +1100
commitce8614a312ef750bb60677bb13680cb27d1c284b (patch)
tree842f01d86dc235bcd80c8544969d9fffeaec30c5 /crypto/api.c
parent809778e02cd45d0625439fee67688f655627bb3c (diff)
downloadlwn-ce8614a312ef750bb60677bb13680cb27d1c284b.tar.gz
lwn-ce8614a312ef750bb60677bb13680cb27d1c284b.zip
crypto: algapi - convert cra_refcnt to refcount_t
Reference counters should use refcount_t rather than atomic_t, since the refcount_t implementation can prevent overflows, reducing the exploitability of reference leak bugs. crypto_alg.cra_refcount is a reference counter with the usual semantics, so switch it over to refcount_t. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/api.c')
-rw-r--r--crypto/api.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/api.c b/crypto/api.c
index 6da802d7be67..70a894e52ff3 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -137,7 +137,7 @@ static struct crypto_alg *crypto_larval_add(const char *name, u32 type,
if (IS_ERR(larval))
return ERR_CAST(larval);
- atomic_set(&larval->alg.cra_refcnt, 2);
+ refcount_set(&larval->alg.cra_refcnt, 2);
down_write(&crypto_alg_sem);
alg = __crypto_alg_lookup(name, type, mask);