diff options
| author | Paul Moore <paul.moore@hp.com> | 2009-02-27 15:00:03 -0500 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-03-02 09:30:04 +1100 |
| commit | d7f59dc4642ce2fc7b79fcd4ec02ffce7f21eb02 (patch) | |
| tree | 1557550ed6478a38cc04ad480a5977580d97b5cd /security/selinux | |
| parent | 778ef1e6cbb049c9bcbf405936ee6f2b6e451892 (diff) | |
| download | lwn-d7f59dc4642ce2fc7b79fcd4ec02ffce7f21eb02.tar.gz lwn-d7f59dc4642ce2fc7b79fcd4ec02ffce7f21eb02.zip | |
selinux: Fix a panic in selinux_netlbl_inode_permission()
Rick McNeal from LSI identified a panic in selinux_netlbl_inode_permission()
caused by a certain sequence of SUNRPC operations. The problem appears to be
due to the lack of NULL pointer checking in the function; this patch adds the
pointer checks so the function will exit safely in the cases where the socket
is not completely initialized.
Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/selinux')
| -rw-r--r-- | security/selinux/netlabel.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c index 3f4b26647386..350794ab9b42 100644 --- a/security/selinux/netlabel.c +++ b/security/selinux/netlabel.c @@ -386,11 +386,12 @@ int selinux_netlbl_inode_permission(struct inode *inode, int mask) if (!S_ISSOCK(inode->i_mode) || ((mask & (MAY_WRITE | MAY_APPEND)) == 0)) return 0; - sock = SOCKET_I(inode); sk = sock->sk; + if (sk == NULL) + return 0; sksec = sk->sk_security; - if (sksec->nlbl_state != NLBL_REQUIRE) + if (sksec == NULL || sksec->nlbl_state != NLBL_REQUIRE) return 0; local_bh_disable(); |