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Th AF_ALG socket was missing a security label (e.g. SELinux)
which means that socket was in "unlabeled" state.
This was recently demonstrated in the cryptsetup package
(cryptsetup v1.6.5 and later.)
See https://bugzilla.redhat.com/show_bug.cgi?id=1115120
This patch clones the sock's label from the parent sock
and resolves the issue (similar to AF_BLUETOOTH protocol family).
Cc: stable@vger.kernel.org
Signed-off-by: Milan Broz <gmazyland@gmail.com>
---
crypto/af_alg.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index 966f893..6a3ad80 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -21,6 +21,7 @@
#include <linux/module.h>
#include <linux/net.h>
#include <linux/rwsem.h>
+#include <linux/security.h>
struct alg_type_list {
const struct af_alg_type *type;
@@ -243,6 +244,7 @@ int af_alg_accept(struct sock *sk, struct socket *newsock)
sock_init_data(newsock, sk2);
sock_graft(sk2, newsock);
+ security_sk_clone(sk, sk2);
err = type->accept(ask->private, sk2);
if (err) {
--
2.0.1
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