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authorDavid Howells <dhowells@redhat.com>2008-07-27 21:31:07 +1000
committerJames Morris <jmorris@namei.org>2008-08-05 10:55:47 +1000
commitcf9481e289247fe9cf40f2e2481220d899132049 (patch)
tree39b8e15d27876cd84acb07c9543b423c29d66a7f /security
parent0c0e186f812457e527c420f7a4d02865fd0dc7d2 (diff)
downloadlinux-linaro-stable-cf9481e289247fe9cf40f2e2481220d899132049.tar.gz
SELinux: Fix a potentially uninitialised variable in SELinux hooks
Fix a potentially uninitialised variable in SELinux hooks that's given a pointer to the network address by selinux_parse_skb() passing a pointer back through its argument list. By restructuring selinux_parse_skb(), the compiler can see that the error case need not set it as the caller will return immediately. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/hooks.c42
1 files changed, 24 insertions, 18 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 0ffd8814af3e..3eae30609702 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3539,38 +3539,44 @@ out:
#endif /* IPV6 */
static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
- char **addrp, int src, u8 *proto)
+ char **_addrp, int src, u8 *proto)
{
- int ret = 0;
+ char *addrp;
+ int ret;
switch (ad->u.net.family) {
case PF_INET:
ret = selinux_parse_skb_ipv4(skb, ad, proto);
- if (ret || !addrp)
- break;
- *addrp = (char *)(src ? &ad->u.net.v4info.saddr :
- &ad->u.net.v4info.daddr);
- break;
+ if (ret)
+ goto parse_error;
+ addrp = (char *)(src ? &ad->u.net.v4info.saddr :
+ &ad->u.net.v4info.daddr);
+ goto okay;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case PF_INET6:
ret = selinux_parse_skb_ipv6(skb, ad, proto);
- if (ret || !addrp)
- break;
- *addrp = (char *)(src ? &ad->u.net.v6info.saddr :
- &ad->u.net.v6info.daddr);
- break;
+ if (ret)
+ goto parse_error;
+ addrp = (char *)(src ? &ad->u.net.v6info.saddr :
+ &ad->u.net.v6info.daddr);
+ goto okay;
#endif /* IPV6 */
default:
- break;
+ addrp = NULL;
+ goto okay;
}
- if (unlikely(ret))
- printk(KERN_WARNING
- "SELinux: failure in selinux_parse_skb(),"
- " unable to parse packet\n");
-
+parse_error:
+ printk(KERN_WARNING
+ "SELinux: failure in selinux_parse_skb(),"
+ " unable to parse packet\n");
return ret;
+
+okay:
+ if (_addrp)
+ *_addrp = addrp;
+ return 0;
}
/**