On 4/8/2020 12:04 PM, Arnd Bergmann wrote:
The mix of IS_ENABLED() and #ifdef checks has left a combination that causes a warning about an unused variable:
security/smack/smack_lsm.c: In function 'smack_socket_connect': security/smack/smack_lsm.c:2838:24: error: unused variable 'sip' [-Werror=unused-variable] 2838 | struct sockaddr_in6 *sip = (struct sockaddr_in6 *)sap;
Change the code to use C-style checks consistently so the compiler can handle it correctly.
Fixes: 87fbfffcc89b ("broken ping to ipv6 linklocal addresses on debian buster") Signed-off-by: Arnd Bergmann arnd@arndb.de
Thanks. I will take this, assuming it passes testing.
There are lots of ways of addressing this, if you prefer a different way, please just treat this patch as a bug report and apply the replacement patch directly.
security/smack/smack.h | 6 ------ security/smack/smack_lsm.c | 25 ++++++++----------------- 2 files changed, 8 insertions(+), 23 deletions(-)
diff --git a/security/smack/smack.h b/security/smack/smack.h index 62529f382942..335d2411abe4 100644 --- a/security/smack/smack.h +++ b/security/smack/smack.h @@ -148,7 +148,6 @@ struct smk_net4addr { struct smack_known *smk_label; /* label */ }; -#if IS_ENABLED(CONFIG_IPV6) /*
- An entry in the table identifying IPv6 hosts.
*/ @@ -159,9 +158,7 @@ struct smk_net6addr { int smk_masks; /* mask size */ struct smack_known *smk_label; /* label */ }; -#endif /* CONFIG_IPV6 */ -#ifdef SMACK_IPV6_PORT_LABELING /*
- An entry in the table identifying ports.
*/ @@ -174,7 +171,6 @@ struct smk_port_label { short smk_sock_type; /* Socket type */ short smk_can_reuse; }; -#endif /* SMACK_IPV6_PORT_LABELING */ struct smack_known_list_elem { struct list_head list; @@ -335,9 +331,7 @@ extern struct smack_known smack_known_web; extern struct mutex smack_known_lock; extern struct list_head smack_known_list; extern struct list_head smk_net4addr_list; -#if IS_ENABLED(CONFIG_IPV6) extern struct list_head smk_net6addr_list; -#endif /* CONFIG_IPV6 */ extern struct mutex smack_onlycap_lock; extern struct list_head smack_onlycap_list; diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 8c61d175e195..e193b0db0271 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -50,10 +50,8 @@ #define SMK_RECEIVING 1 #define SMK_SENDING 2 -#ifdef SMACK_IPV6_PORT_LABELING -DEFINE_MUTEX(smack_ipv6_lock); +static DEFINE_MUTEX(smack_ipv6_lock); static LIST_HEAD(smk_ipv6_port_list); -#endif static struct kmem_cache *smack_inode_cache; struct kmem_cache *smack_rule_cache; int smack_enabled; @@ -2320,7 +2318,6 @@ static struct smack_known *smack_ipv4host_label(struct sockaddr_in *sip) return NULL; } -#if IS_ENABLED(CONFIG_IPV6) /*
- smk_ipv6_localhost - Check for local ipv6 host address
- @sip: the address
@@ -2388,7 +2385,6 @@ static struct smack_known *smack_ipv6host_label(struct sockaddr_in6 *sip) return NULL; } -#endif /* CONFIG_IPV6 */ /**
- smack_netlabel - Set the secattr on a socket
@@ -2477,7 +2473,6 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap) return smack_netlabel(sk, sk_lbl); } -#if IS_ENABLED(CONFIG_IPV6) /**
- smk_ipv6_check - check Smack access
- @subject: subject Smack label
@@ -2510,7 +2505,6 @@ static int smk_ipv6_check(struct smack_known *subject, rc = smk_bu_note("IPv6 check", subject, object, MAY_WRITE, rc); return rc; } -#endif /* CONFIG_IPV6 */ #ifdef SMACK_IPV6_PORT_LABELING /** @@ -2599,6 +2593,7 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address) mutex_unlock(&smack_ipv6_lock); return; } +#endif /**
- smk_ipv6_port_check - check Smack port access
@@ -2661,7 +2656,6 @@ static int smk_ipv6_port_check(struct sock *sk, struct sockaddr_in6 *address, return smk_ipv6_check(skp, object, address, act); } -#endif /* SMACK_IPV6_PORT_LABELING */ /**
- smack_inode_setsecurity - set smack xattrs
@@ -2836,24 +2830,21 @@ static int smack_socket_connect(struct socket *sock, struct sockaddr *sap, return 0; if (IS_ENABLED(CONFIG_IPV6) && sap->sa_family == AF_INET6) { struct sockaddr_in6 *sip = (struct sockaddr_in6 *)sap; -#ifdef SMACK_IPV6_SECMARK_LABELING
struct smack_known *rsp;-#endif
struct smack_known *rsp = NULL;if (addrlen < SIN6_LEN_RFC2133) return 0; -#ifdef SMACK_IPV6_SECMARK_LABELING
rsp = smack_ipv6host_label(sip);
if (__is_defined(SMACK_IPV6_SECMARK_LABELING))rsp = smack_ipv6host_label(sip);rc = smk_ipv6_check(ssp->smk_out, rsp, sip, SMK_CONNECTING); } -#endif -#ifdef SMACK_IPV6_PORT_LABELING
rc = smk_ipv6_port_check(sock->sk, sip, SMK_CONNECTING);-#endif
if (__is_defined(SMACK_IPV6_PORT_LABELING))rc = smk_ipv6_port_check(sock->sk, sip, SMK_CONNECTING);- return rc; } if (sap->sa_family != AF_INET || addrlen < sizeof(struct sockaddr_in))