diff options
| author | Ahmed S. Darwish <darwish.07@gmail.com> | 2008-02-13 15:03:34 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-13 16:21:20 -0800 |
| commit | 2e1d146a19f2941aec08f60ca67fb2763baad595 (patch) | |
| tree | 14831c6332b2d4004a7551354be46526a0c6f426 /security | |
| parent | cba44359d15ac7a3bca2c9199b7ff403d7edc69e (diff) | |
| download | lwn-2e1d146a19f2941aec08f60ca67fb2763baad595.tar.gz lwn-2e1d146a19f2941aec08f60ca67fb2763baad595.zip | |
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')
| -rw-r--r-- | security/smack/smack_lsm.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 1c11e4245859..5b690482f8cb 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. |