path: root/security/selinux/hooks.c
diff options
authorDavid S. Miller <davem@davemloft.net>2011-01-05 15:38:53 -0800
committerDavid S. Miller <davem@davemloft.net>2011-01-05 15:38:53 -0800
commit3610cda53f247e176bcbb7a7cca64bc53b12acdb (patch)
treed780bc1e405116e75a194b2f4693a6f9bbe9f58f /security/selinux/hooks.c
parent44b8288308ac9da27eab7d7bdbf1375a568805c3 (diff)
af_unix: Avoid socket->sk NULL OOPS in stream connect security hooks.
unix_release() can asynchornously set socket->sk to NULL, and it does so without holding the unix_state_lock() on "other" during stream connects. However, the reverse mapping, sk->sk_socket, is only transitioned to NULL under the unix_state_lock(). Therefore make the security hooks follow the reverse mapping instead of the forward mapping. Reported-by: Jeremy Fitzhardinge <jeremy@goop.org> Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'security/selinux/hooks.c')
1 files changed, 5 insertions, 5 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index c82538a4b1a4..6f637d2678ac 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3921,18 +3921,18 @@ static int selinux_socket_shutdown(struct socket *sock, int how)
return sock_has_perm(current, sock->sk, SOCKET__SHUTDOWN);
-static int selinux_socket_unix_stream_connect(struct socket *sock,
- struct socket *other,
+static int selinux_socket_unix_stream_connect(struct sock *sock,
+ struct sock *other,
struct sock *newsk)
- struct sk_security_struct *sksec_sock = sock->sk->sk_security;
- struct sk_security_struct *sksec_other = other->sk->sk_security;
+ struct sk_security_struct *sksec_sock = sock->sk_security;
+ struct sk_security_struct *sksec_other = other->sk_security;
struct sk_security_struct *sksec_new = newsk->sk_security;
struct common_audit_data ad;
int err;
- ad.u.net.sk = other->sk;
+ ad.u.net.sk = other;
err = avc_has_perm(sksec_sock->sid, sksec_other->sid,

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