diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-03-25 15:23:11 +0100 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2019-03-25 10:34:35 -0400 |
| commit | 98bbbb76f2edcfb8fb2b8f4b3ccc7b6e99d64bd8 (patch) | |
| tree | 4f7ba5d1d0ea45e637333dcfb73d396f70a95f21 | |
| parent | 9e0cfe28fa32f6fefd831192a4d0b19c804c746b (diff) | |
| download | linux-98bbbb76f2edcfb8fb2b8f4b3ccc7b6e99d64bd8.tar.bz2 | |
selinux: avoid uninitialized variable warning
clang correctly points out a code path that would lead
to an uninitialized variable use:
security/selinux/netlabel.c:310:6: error: variable 'addr' is used uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
if (ip_hdr(skb)->version == 4) {
^~~~~~~~~~~~~~~~~~~~~~~~~
security/selinux/netlabel.c:322:40: note: uninitialized use occurs here
rc = netlbl_conn_setattr(ep->base.sk, addr, &secattr);
^~~~
security/selinux/netlabel.c:310:2: note: remove the 'if' if its condition is always true
if (ip_hdr(skb)->version == 4) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
security/selinux/netlabel.c:291:23: note: initialize the variable 'addr' to silence this warning
struct sockaddr *addr;
^
= NULL
This is probably harmless since we should not see ipv6 packets
of CONFIG_IPV6 is disabled, but it's better to rearrange the code
so this cannot happen.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[PM: removed old patchwork link, fixed checkpatch.pl style errors]
Signed-off-by: Paul Moore <paul@paul-moore.com>
| -rw-r--r-- | security/selinux/netlabel.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c index 186e727b737b..6fd9954e1c08 100644 --- a/security/selinux/netlabel.c +++ b/security/selinux/netlabel.c @@ -288,11 +288,8 @@ int selinux_netlbl_sctp_assoc_request(struct sctp_endpoint *ep, int rc; struct netlbl_lsm_secattr secattr; struct sk_security_struct *sksec = ep->base.sk->sk_security; - struct sockaddr *addr; struct sockaddr_in addr4; -#if IS_ENABLED(CONFIG_IPV6) struct sockaddr_in6 addr6; -#endif if (ep->base.sk->sk_family != PF_INET && ep->base.sk->sk_family != PF_INET6) @@ -310,16 +307,15 @@ int selinux_netlbl_sctp_assoc_request(struct sctp_endpoint *ep, if (ip_hdr(skb)->version == 4) { addr4.sin_family = AF_INET; addr4.sin_addr.s_addr = ip_hdr(skb)->saddr; - addr = (struct sockaddr *)&addr4; -#if IS_ENABLED(CONFIG_IPV6) - } else { + rc = netlbl_conn_setattr(ep->base.sk, (void *)&addr4, &secattr); + } else if (IS_ENABLED(CONFIG_IPV6) && ip_hdr(skb)->version == 6) { addr6.sin6_family = AF_INET6; addr6.sin6_addr = ipv6_hdr(skb)->saddr; - addr = (struct sockaddr *)&addr6; -#endif + rc = netlbl_conn_setattr(ep->base.sk, (void *)&addr6, &secattr); + } else { + rc = -EAFNOSUPPORT; } - rc = netlbl_conn_setattr(ep->base.sk, addr, &secattr); if (rc == 0) sksec->nlbl_state = NLBL_LABELED; |