If accept(2) is called on socket type algif_hash with
MSG_MORE flag set and crypto_ahash_import fails,
sk2 is freed. However, it is also freed in af_alg_release,
leading to slab-use-after-free error.
Fixes: fe869cdb89c9 ("crypto: algif_hash - User-space interface for hash operations")
Signed-off-by: Ivan Pravdin <ipravdin.official@xxxxxxxxx>
---
crypto/algif_hash.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index 5498a87249d3..e3f1a4852737 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -265,10 +265,6 @@ static int hash_accept(struct socket *sock, struct socket *newsock,
goto out_free_state;
err = crypto_ahash_import(&ctx2->req, state);
- if (err) {
- sock_orphan(sk2);
- sock_put(sk2);
- }
out_free_state:
kfree_sensitive(state);
--
2.45.2
