aboutsummaryrefslogtreecommitdiff
path: root/security/smack
diff options
context:
space:
mode:
authorAhmed S. Darwish <darwish.07@gmail.com>2008-02-13 15:03:34 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-13 16:21:20 -0800
commit2e1d146a19f2941aec08f60ca67fb2763baad595 (patch)
tree14831c6332b2d4004a7551354be46526a0c6f426 /security/smack
parentcba44359d15ac7a3bca2c9199b7ff403d7edc69e (diff)
downloadlinux-2.6.38-lt-ux500-2e1d146a19f2941aec08f60ca67fb2763baad595.tar.gz
Smack: check for 'struct socket' with NULL sk
There's a small problem with smack and NFS. A similar report was also sent here: http://lkml.org/lkml/2007/10/27/85 I've also added similar checks in inode_{get/set}security(). Cheating from SELinux post_create_socket(), it does the same. [akpm@linux-foundation.org: remove uneeded BUG_ON()] Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> Acked-by: Casey Schaufler <casey@schuafler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/smack')
-rw-r--r--security/smack/smack_lsm.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 1c11e424585..5b690482f8c 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -701,7 +701,7 @@ static int smack_inode_getsecurity(const struct inode *inode,
return -EOPNOTSUPP;
sock = SOCKET_I(ip);
- if (sock == NULL)
+ if (sock == NULL || sock->sk == NULL)
return -EOPNOTSUPP;
ssp = sock->sk->sk_security;
@@ -1280,10 +1280,11 @@ static void smack_to_secattr(char *smack, struct netlbl_lsm_secattr *nlsp)
*/
static int smack_netlabel(struct sock *sk)
{
- struct socket_smack *ssp = sk->sk_security;
+ struct socket_smack *ssp;
struct netlbl_lsm_secattr secattr;
int rc = 0;
+ ssp = sk->sk_security;
netlbl_secattr_init(&secattr);
smack_to_secattr(ssp->smk_out, &secattr);
if (secattr.flags != NETLBL_SECATTR_NONE)
@@ -1331,7 +1332,7 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
return -EOPNOTSUPP;
sock = SOCKET_I(inode);
- if (sock == NULL)
+ if (sock == NULL || sock->sk == NULL)
return -EOPNOTSUPP;
ssp = sock->sk->sk_security;
@@ -1362,7 +1363,7 @@ static int smack_inode_setsecurity(struct inode *inode, const char *name,
static int smack_socket_post_create(struct socket *sock, int family,
int type, int protocol, int kern)
{
- if (family != PF_INET)
+ if (family != PF_INET || sock->sk == NULL)
return 0;
/*
* Set the outbound netlbl.