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Message-Id: <20201130153631.21872-2-fw@strlen.de>
Date: Mon, 30 Nov 2020 16:36:29 +0100
From: Florian Westphal <fw@...len.de>
To: <netdev@...r.kernel.org>
Cc: mptcp@...ts.01.org, linux-security-module@...r.kernel.org,
Florian Westphal <fw@...len.de>
Subject: [PATCH net-next 1/3] security: add const qualifier to struct sock in various places
A followup change to tcp_request_sock_op would have to drop the 'const'
qualifier from the 'route_req' function as the
'security_inet_conn_request' call is moved there - and that function
expects a 'struct sock *'.
However, it turns out its also possible to add a const qualifier to
security_inet_conn_request instead.
Signed-off-by: Florian Westphal <fw@...len.de>
---
The code churn is unfortunate. Alternative would be to change
the function signature of ->route_req:
struct dst_entry *(*route_req)(struct sock *sk, ...
[ i.e., drop 'const' ]. Thoughts?
include/linux/lsm_audit.h | 2 +-
include/linux/lsm_hook_defs.h | 2 +-
include/linux/security.h | 4 ++--
security/apparmor/include/net.h | 2 +-
security/apparmor/lsm.c | 2 +-
security/apparmor/net.c | 6 +++---
security/lsm_audit.c | 4 ++--
security/security.c | 2 +-
security/selinux/hooks.c | 2 +-
security/smack/smack_lsm.c | 4 ++--
10 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h
index 28f23b341c1c..cd23355d2271 100644
--- a/include/linux/lsm_audit.h
+++ b/include/linux/lsm_audit.h
@@ -26,7 +26,7 @@
struct lsm_network_audit {
int netif;
- struct sock *sk;
+ const struct sock *sk;
u16 family;
__be16 dport;
__be16 sport;
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 32a940117e7a..acc0494cceba 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -301,7 +301,7 @@ LSM_HOOK(void, LSM_RET_VOID, sk_clone_security, const struct sock *sk,
struct sock *newsk)
LSM_HOOK(void, LSM_RET_VOID, sk_getsecid, struct sock *sk, u32 *secid)
LSM_HOOK(void, LSM_RET_VOID, sock_graft, struct sock *sk, struct socket *parent)
-LSM_HOOK(int, 0, inet_conn_request, struct sock *sk, struct sk_buff *skb,
+LSM_HOOK(int, 0, inet_conn_request, const struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
LSM_HOOK(void, LSM_RET_VOID, inet_csk_clone, struct sock *newsk,
const struct request_sock *req)
diff --git a/include/linux/security.h b/include/linux/security.h
index bc2725491560..0df62735651b 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1358,7 +1358,7 @@ void security_sk_clone(const struct sock *sk, struct sock *newsk);
void security_sk_classify_flow(struct sock *sk, struct flowi *fl);
void security_req_classify_flow(const struct request_sock *req, struct flowi *fl);
void security_sock_graft(struct sock*sk, struct socket *parent);
-int security_inet_conn_request(struct sock *sk,
+int security_inet_conn_request(const struct sock *sk,
struct sk_buff *skb, struct request_sock *req);
void security_inet_csk_clone(struct sock *newsk,
const struct request_sock *req);
@@ -1519,7 +1519,7 @@ static inline void security_sock_graft(struct sock *sk, struct socket *parent)
{
}
-static inline int security_inet_conn_request(struct sock *sk,
+static inline int security_inet_conn_request(const struct sock *sk,
struct sk_buff *skb, struct request_sock *req)
{
return 0;
diff --git a/security/apparmor/include/net.h b/security/apparmor/include/net.h
index 2431c011800d..aadb4b29fb66 100644
--- a/security/apparmor/include/net.h
+++ b/security/apparmor/include/net.h
@@ -107,6 +107,6 @@ int aa_sock_file_perm(struct aa_label *label, const char *op, u32 request,
struct socket *sock);
int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
- u32 secid, struct sock *sk);
+ u32 secid, const struct sock *sk);
#endif /* __AA_NET_H */
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index ffeaee5ed968..1b0aba8eb723 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -1147,7 +1147,7 @@ static void apparmor_sock_graft(struct sock *sk, struct socket *parent)
}
#ifdef CONFIG_NETWORK_SECMARK
-static int apparmor_inet_conn_request(struct sock *sk, struct sk_buff *skb,
+static int apparmor_inet_conn_request(const struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
struct aa_sk_ctx *ctx = SK_CTX(sk);
diff --git a/security/apparmor/net.c b/security/apparmor/net.c
index fa0e85568450..e0c1b50d6edd 100644
--- a/security/apparmor/net.c
+++ b/security/apparmor/net.c
@@ -211,7 +211,7 @@ static int apparmor_secmark_init(struct aa_secmark *secmark)
}
static int aa_secmark_perm(struct aa_profile *profile, u32 request, u32 secid,
- struct common_audit_data *sa, struct sock *sk)
+ struct common_audit_data *sa)
{
int i, ret;
struct aa_perms perms = { };
@@ -244,13 +244,13 @@ static int aa_secmark_perm(struct aa_profile *profile, u32 request, u32 secid,
}
int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
- u32 secid, struct sock *sk)
+ u32 secid, const struct sock *sk)
{
struct aa_profile *profile;
DEFINE_AUDIT_SK(sa, op, sk);
return fn_for_each_confined(label, profile,
aa_secmark_perm(profile, request, secid,
- &sa, sk));
+ &sa));
}
#endif
diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index 53d0d183db8f..078f9cdcd7f5 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -183,7 +183,7 @@ int ipv6_skb_to_auditdata(struct sk_buff *skb,
static inline void print_ipv6_addr(struct audit_buffer *ab,
- struct in6_addr *addr, __be16 port,
+ const struct in6_addr *addr, __be16 port,
char *name1, char *name2)
{
if (!ipv6_addr_any(addr))
@@ -322,7 +322,7 @@ static void dump_common_audit_data(struct audit_buffer *ab,
}
case LSM_AUDIT_DATA_NET:
if (a->u.net->sk) {
- struct sock *sk = a->u.net->sk;
+ const struct sock *sk = a->u.net->sk;
struct unix_sock *u;
struct unix_address *addr;
int len = 0;
diff --git a/security/security.c b/security/security.c
index a28045dc9e7f..6509f95d203f 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2225,7 +2225,7 @@ void security_sock_graft(struct sock *sk, struct socket *parent)
}
EXPORT_SYMBOL(security_sock_graft);
-int security_inet_conn_request(struct sock *sk,
+int security_inet_conn_request(const struct sock *sk,
struct sk_buff *skb, struct request_sock *req)
{
return call_int_hook(inet_conn_request, 0, sk, skb, req);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 6b1826fc3658..6fa593006802 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -5355,7 +5355,7 @@ static void selinux_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
selinux_netlbl_sctp_sk_clone(sk, newsk);
}
-static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
+static int selinux_inet_conn_request(const struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
struct sk_security_struct *sksec = sk->sk_security;
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 5c90b9fa4d40..3a62d6aa74a6 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3864,7 +3864,7 @@ static inline struct smack_known *smack_from_skb(struct sk_buff *skb)
*
* Returns smack_known of the IP options or NULL if that won't work.
*/
-static struct smack_known *smack_from_netlbl(struct sock *sk, u16 family,
+static struct smack_known *smack_from_netlbl(const struct sock *sk, u16 family,
struct sk_buff *skb)
{
struct netlbl_lsm_secattr secattr;
@@ -4114,7 +4114,7 @@ static void smack_sock_graft(struct sock *sk, struct socket *parent)
* Returns 0 if a task with the packet label could write to
* the socket, otherwise an error code
*/
-static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
+static int smack_inet_conn_request(const struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
u16 family = sk->sk_family;
--
2.26.2
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