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security: pass asoc to sctp_assoc_request and sctp_sk_clone

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This patch is to move secid and peer_secid from endpoint to association,
and pass asoc to sctp_assoc_request and sctp_sk_clone instead of ep. As
ep is the local endpoint and asoc represents a connection, and in SCTP
one sk/ep could have multiple asoc/connection, saving secid/peer_secid
for new asoc will overwrite the old asoc's.

Note that since asoc can be passed as NULL, security_sctp_assoc_request()
is moved to the place right after the new_asoc is created in
sctp_sf_do_5_1B_init() and sctp_sf_do_unexpected_init().

v1->v2:
  - fix the description of selinux_netlbl_skbuff_setsid(), as Jakub noticed.
  - fix the annotation in selinux_sctp_assoc_request(), as Richard Noticed.

Fixes: 72e89f5008 ("security: Add support for SCTP security hooks")
Reported-by: Prashanth Prahlad <pprahlad@redhat.com>
Reviewed-by: Richard Haines <richard_c_haines@btinternet.com>
Tested-by: Richard Haines <richard_c_haines@btinternet.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2021-11-02 08:02:47 -04:00 committed by David S. Miller
parent 843c3cbbdf
commit c081d53f97
11 changed files with 76 additions and 77 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

28
Documentation/security/SCTP.rst
View file

@ -26,11 +26,11 @@ described in the `SCTP SELinux Support`_ chapter.
security_sctp_assoc_request() security_sctp_assoc_request()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Passes the ``@ep`` and ``@chunk->skb`` of the association INIT packet to the Passes the ``@asoc`` and ``@chunk->skb`` of the association INIT packet to the
security module. Returns 0 on success, error on failure. security module. Returns 0 on success, error on failure.
:: ::
@ep - pointer to sctp endpoint structure. @asoc - pointer to sctp association structure.
@skb - pointer to skbuff of association packet. @skb - pointer to skbuff of association packet.
@ -117,9 +117,9 @@ Called whenever a new socket is created by **accept**\(2)
calls **sctp_peeloff**\(3). calls **sctp_peeloff**\(3).
:: ::
@ep - pointer to current sctp endpoint structure. @asoc - pointer to current sctp association structure.
@sk - pointer to current sock structure. @sk - pointer to current sock structure.
@sk - pointer to new sock structure. @newsk - pointer to new sock structure.
security_inet_conn_established() security_inet_conn_established()
@ -200,22 +200,22 @@ hooks with the SELinux specifics expanded below::
security_sctp_assoc_request() security_sctp_assoc_request()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Passes the ``@ep`` and ``@chunk->skb`` of the association INIT packet to the Passes the ``@asoc`` and ``@chunk->skb`` of the association INIT packet to the
security module. Returns 0 on success, error on failure. security module. Returns 0 on success, error on failure.
:: ::
@ep - pointer to sctp endpoint structure. @asoc - pointer to sctp association structure.
@skb - pointer to skbuff of association packet. @skb - pointer to skbuff of association packet.
The security module performs the following operations: The security module performs the following operations:
IF this is the first association on ``@ep->base.sk``, then set the peer IF this is the first association on ``@asoc->base.sk``, then set the peer
sid to that in ``@skb``. This will ensure there is only one peer sid sid to that in ``@skb``. This will ensure there is only one peer sid
assigned to ``@ep->base.sk`` that may support multiple associations. assigned to ``@asoc->base.sk`` that may support multiple associations.
ELSE validate the ``@ep->base.sk peer_sid`` against the ``@skb peer sid`` ELSE validate the ``@asoc->base.sk peer_sid`` against the ``@skb peer sid``
to determine whether the association should be allowed or denied. to determine whether the association should be allowed or denied.
Set the sctp ``@ep sid`` to socket's sid (from ``ep->base.sk``) with Set the sctp ``@asoc sid`` to socket's sid (from ``asoc->base.sk``) with
MLS portion taken from ``@skb peer sid``. This will be used by SCTP MLS portion taken from ``@skb peer sid``. This will be used by SCTP
TCP style sockets and peeled off connections as they cause a new socket TCP style sockets and peeled off connections as they cause a new socket
to be generated. to be generated.
@ -259,13 +259,13 @@ security_sctp_sk_clone()
Called whenever a new socket is created by **accept**\(2) (i.e. a TCP style Called whenever a new socket is created by **accept**\(2) (i.e. a TCP style
socket) or when a socket is 'peeled off' e.g userspace calls socket) or when a socket is 'peeled off' e.g userspace calls
**sctp_peeloff**\(3). ``security_sctp_sk_clone()`` will set the new **sctp_peeloff**\(3). ``security_sctp_sk_clone()`` will set the new
sockets sid and peer sid to that contained in the ``@ep sid`` and sockets sid and peer sid to that contained in the ``@asoc sid`` and
``@ep peer sid`` respectively. ``@asoc peer sid`` respectively.
:: ::
@ep - pointer to current sctp endpoint structure. @asoc - pointer to current sctp association structure.
@sk - pointer to current sock structure. @sk - pointer to current sock structure.
@sk - pointer to new sock structure. @newsk - pointer to new sock structure.
security_inet_conn_established() security_inet_conn_established()

4
include/linux/lsm_hook_defs.h
View file

@ -329,11 +329,11 @@ LSM_HOOK(int, 0, tun_dev_create, void)
LSM_HOOK(int, 0, tun_dev_attach_queue, void *security) LSM_HOOK(int, 0, tun_dev_attach_queue, void *security)
LSM_HOOK(int, 0, tun_dev_attach, struct sock *sk, void *security) LSM_HOOK(int, 0, tun_dev_attach, struct sock *sk, void *security)
LSM_HOOK(int, 0, tun_dev_open, void *security) LSM_HOOK(int, 0, tun_dev_open, void *security)
LSM_HOOK(int, 0, sctp_assoc_request, struct sctp_endpoint *ep, LSM_HOOK(int, 0, sctp_assoc_request, struct sctp_association *asoc,
struct sk_buff *skb) struct sk_buff *skb)
LSM_HOOK(int, 0, sctp_bind_connect, struct sock *sk, int optname, LSM_HOOK(int, 0, sctp_bind_connect, struct sock *sk, int optname,
struct sockaddr *address, int addrlen) struct sockaddr *address, int addrlen)
LSM_HOOK(void, LSM_RET_VOID, sctp_sk_clone, struct sctp_endpoint *ep, LSM_HOOK(void, LSM_RET_VOID, sctp_sk_clone, struct sctp_association *asoc,
struct sock *sk, struct sock *newsk) struct sock *sk, struct sock *newsk)
#endif /* CONFIG_SECURITY_NETWORK */ #endif /* CONFIG_SECURITY_NETWORK */

8
include/linux/lsm_hooks.h
View file

@ -1027,9 +1027,9 @@
* Security hooks for SCTP * Security hooks for SCTP
* *
* @sctp_assoc_request: * @sctp_assoc_request:
* Passes the @ep and @chunk->skb of the association INIT packet to * Passes the @asoc and @chunk->skb of the association INIT packet to
* the security module. * the security module.
* @ep pointer to sctp endpoint structure. * @asoc pointer to sctp association structure.
* @skb pointer to skbuff of association packet. * @skb pointer to skbuff of association packet.
* Return 0 on success, error on failure. * Return 0 on success, error on failure.
* @sctp_bind_connect: * @sctp_bind_connect:
@ -1047,9 +1047,9 @@
* Called whenever a new socket is created by accept(2) (i.e. a TCP * Called whenever a new socket is created by accept(2) (i.e. a TCP
* style socket) or when a socket is 'peeled off' e.g userspace * style socket) or when a socket is 'peeled off' e.g userspace
* calls sctp_peeloff(3). * calls sctp_peeloff(3).
* @ep pointer to current sctp endpoint structure. * @asoc pointer to current sctp association structure.
* @sk pointer to current sock structure. * @sk pointer to current sock structure.
* @sk pointer to new sock structure. * @newsk pointer to new sock structure.
* *
* Security hooks for Infiniband * Security hooks for Infiniband
* *

10
include/linux/security.h
View file

@ -179,7 +179,7 @@ struct xfrm_policy;
struct xfrm_state; struct xfrm_state;
struct xfrm_user_sec_ctx; struct xfrm_user_sec_ctx;
struct seq_file; struct seq_file;
struct sctp_endpoint; struct sctp_association;
#ifdef CONFIG_MMU #ifdef CONFIG_MMU
extern unsigned long mmap_min_addr; extern unsigned long mmap_min_addr;
@ -1425,10 +1425,10 @@ int security_tun_dev_create(void);
int security_tun_dev_attach_queue(void *security); int security_tun_dev_attach_queue(void *security);
int security_tun_dev_attach(struct sock *sk, void *security); int security_tun_dev_attach(struct sock *sk, void *security);
int security_tun_dev_open(void *security); int security_tun_dev_open(void *security);
int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb); int security_sctp_assoc_request(struct sctp_association *asoc, struct sk_buff *skb);
int security_sctp_bind_connect(struct sock *sk, int optname, int security_sctp_bind_connect(struct sock *sk, int optname,
struct sockaddr *address, int addrlen); struct sockaddr *address, int addrlen);
void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
struct sock *newsk); struct sock *newsk);
#else /* CONFIG_SECURITY_NETWORK */ #else /* CONFIG_SECURITY_NETWORK */
@ -1631,7 +1631,7 @@ static inline int security_tun_dev_open(void *security)
return 0; return 0;
} }
static inline int security_sctp_assoc_request(struct sctp_endpoint *ep, static inline int security_sctp_assoc_request(struct sctp_association *asoc,
struct sk_buff *skb) struct sk_buff *skb)
{ {
return 0; return 0;
@ -1644,7 +1644,7 @@ static inline int security_sctp_bind_connect(struct sock *sk, int optname,
return 0; return 0;
} }
static inline void security_sctp_sk_clone(struct sctp_endpoint *ep, static inline void security_sctp_sk_clone(struct sctp_association *asoc,
struct sock *sk, struct sock *sk,
struct sock *newsk) struct sock *newsk)
{ {

20
include/net/sctp/structs.h
View file

@ -1355,16 +1355,6 @@ struct sctp_endpoint {
reconf_enable:1; reconf_enable:1;
__u8 strreset_enable; __u8 strreset_enable;
/* Security identifiers from incoming (INIT). These are set by
* security_sctp_assoc_request(). These will only be used by
* SCTP TCP type sockets and peeled off connections as they
* cause a new socket to be generated. security_sctp_sk_clone()
* will then plug these into the new socket.
*/
u32 secid;
u32 peer_secid;
}; };
/* Recover the outter endpoint structure. */ /* Recover the outter endpoint structure. */
@ -2104,6 +2094,16 @@ struct sctp_association {
__u64 abandoned_unsent[SCTP_PR_INDEX(MAX) + 1]; __u64 abandoned_unsent[SCTP_PR_INDEX(MAX) + 1];
__u64 abandoned_sent[SCTP_PR_INDEX(MAX) + 1]; __u64 abandoned_sent[SCTP_PR_INDEX(MAX) + 1];
/* Security identifiers from incoming (INIT). These are set by
* security_sctp_assoc_request(). These will only be used by
* SCTP TCP type sockets and peeled off connections as they
* cause a new socket to be generated. security_sctp_sk_clone()
* will then plug these into the new socket.
*/
u32 secid;
u32 peer_secid;
struct rcu_head rcu; struct rcu_head rcu;
}; };

26
net/sctp/sm_statefuns.c
View file

@ -326,11 +326,6 @@ enum sctp_disposition sctp_sf_do_5_1B_init(struct net *net,
struct sctp_packet *packet; struct sctp_packet *packet;
int len; int len;
/* Update socket peer label if first association. */
if (security_sctp_assoc_request((struct sctp_endpoint *)ep,
chunk->skb))
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
/* 6.10 Bundling /* 6.10 Bundling
* An endpoint MUST NOT bundle INIT, INIT ACK or * An endpoint MUST NOT bundle INIT, INIT ACK or
* SHUTDOWN COMPLETE with any other chunks. * SHUTDOWN COMPLETE with any other chunks.
@ -415,6 +410,12 @@ enum sctp_disposition sctp_sf_do_5_1B_init(struct net *net,
if (!new_asoc) if (!new_asoc)
goto nomem; goto nomem;
/* Update socket peer label if first association. */
if (security_sctp_assoc_request(new_asoc, chunk->skb)) {
sctp_association_free(new_asoc);
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
if (sctp_assoc_set_bind_addr_from_ep(new_asoc, if (sctp_assoc_set_bind_addr_from_ep(new_asoc,
sctp_scope(sctp_source(chunk)), sctp_scope(sctp_source(chunk)),
GFP_ATOMIC) < 0) GFP_ATOMIC) < 0)
@ -780,7 +781,6 @@ enum sctp_disposition sctp_sf_do_5_1D_ce(struct net *net,
} }
} }
/* Delay state machine commands until later. /* Delay state machine commands until later.
* *
* Re-build the bind address for the association is done in * Re-build the bind address for the association is done in
@ -1517,11 +1517,6 @@ static enum sctp_disposition sctp_sf_do_unexpected_init(
struct sctp_packet *packet; struct sctp_packet *packet;
int len; int len;
/* Update socket peer label if first association. */
if (security_sctp_assoc_request((struct sctp_endpoint *)ep,
chunk->skb))
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
/* 6.10 Bundling /* 6.10 Bundling
* An endpoint MUST NOT bundle INIT, INIT ACK or * An endpoint MUST NOT bundle INIT, INIT ACK or
* SHUTDOWN COMPLETE with any other chunks. * SHUTDOWN COMPLETE with any other chunks.
@ -1594,6 +1589,12 @@ static enum sctp_disposition sctp_sf_do_unexpected_init(
if (!new_asoc) if (!new_asoc)
goto nomem; goto nomem;
/* Update socket peer label if first association. */
if (security_sctp_assoc_request(new_asoc, chunk->skb)) {
sctp_association_free(new_asoc);
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
if (sctp_assoc_set_bind_addr_from_ep(new_asoc, if (sctp_assoc_set_bind_addr_from_ep(new_asoc,
sctp_scope(sctp_source(chunk)), GFP_ATOMIC) < 0) sctp_scope(sctp_source(chunk)), GFP_ATOMIC) < 0)
goto nomem; goto nomem;
@ -2255,8 +2256,7 @@ enum sctp_disposition sctp_sf_do_5_2_4_dupcook(
} }
/* Update socket peer label if first association. */ /* Update socket peer label if first association. */
if (security_sctp_assoc_request((struct sctp_endpoint *)ep, if (security_sctp_assoc_request(new_asoc, chunk->skb)) {
chunk->skb)) {
sctp_association_free(new_asoc); sctp_association_free(new_asoc);
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands); return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
} }

5
net/sctp/socket.c
View file

@ -9412,7 +9412,6 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk,
struct inet_sock *inet = inet_sk(sk); struct inet_sock *inet = inet_sk(sk);
struct inet_sock *newinet; struct inet_sock *newinet;
struct sctp_sock *sp = sctp_sk(sk); struct sctp_sock *sp = sctp_sk(sk);
struct sctp_endpoint *ep = sp->ep;
newsk->sk_type = sk->sk_type; newsk->sk_type = sk->sk_type;
newsk->sk_bound_dev_if = sk->sk_bound_dev_if; newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
@ -9457,9 +9456,9 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk,
net_enable_timestamp(); net_enable_timestamp();
/* Set newsk security attributes from original sk and connection /* Set newsk security attributes from original sk and connection
* security attribute from ep. * security attribute from asoc.
*/ */
security_sctp_sk_clone(ep, sk, newsk); security_sctp_sk_clone(asoc, sk, newsk);
} }
static inline void sctp_copy_descendant(struct sock *sk_to, static inline void sctp_copy_descendant(struct sock *sk_to,

8
security/security.c
View file

@ -2367,9 +2367,9 @@ int security_tun_dev_open(void *security)
} }
EXPORT_SYMBOL(security_tun_dev_open); EXPORT_SYMBOL(security_tun_dev_open);
int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) int security_sctp_assoc_request(struct sctp_association *asoc, struct sk_buff *skb)
{ {
return call_int_hook(sctp_assoc_request, 0, ep, skb); return call_int_hook(sctp_assoc_request, 0, asoc, skb);
} }
EXPORT_SYMBOL(security_sctp_assoc_request); EXPORT_SYMBOL(security_sctp_assoc_request);
@ -2381,10 +2381,10 @@ int security_sctp_bind_connect(struct sock *sk, int optname,
} }
EXPORT_SYMBOL(security_sctp_bind_connect); EXPORT_SYMBOL(security_sctp_bind_connect);
void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
struct sock *newsk) struct sock *newsk)
{ {
call_void_hook(sctp_sk_clone, ep, sk, newsk); call_void_hook(sctp_sk_clone, asoc, sk, newsk);
} }
EXPORT_SYMBOL(security_sctp_sk_clone); EXPORT_SYMBOL(security_sctp_sk_clone);

22
security/selinux/hooks.c
View file

@ -5339,10 +5339,10 @@ static void selinux_sock_graft(struct sock *sk, struct socket *parent)
* connect(2), sctp_connectx(3) or sctp_sendmsg(3) (with no association * connect(2), sctp_connectx(3) or sctp_sendmsg(3) (with no association
* already present). * already present).
*/ */
static int selinux_sctp_assoc_request(struct sctp_endpoint *ep, static int selinux_sctp_assoc_request(struct sctp_association *asoc,
struct sk_buff *skb) struct sk_buff *skb)
{ {
struct sk_security_struct *sksec = ep->base.sk->sk_security; struct sk_security_struct *sksec = asoc->base.sk->sk_security;
struct common_audit_data ad; struct common_audit_data ad;
struct lsm_network_audit net = {0,}; struct lsm_network_audit net = {0,};
u8 peerlbl_active; u8 peerlbl_active;
@ -5359,7 +5359,7 @@ static int selinux_sctp_assoc_request(struct sctp_endpoint *ep,
/* This will return peer_sid = SECSID_NULL if there are /* This will return peer_sid = SECSID_NULL if there are
* no peer labels, see security_net_peersid_resolve(). * no peer labels, see security_net_peersid_resolve().
*/ */
err = selinux_skb_peerlbl_sid(skb, ep->base.sk->sk_family, err = selinux_skb_peerlbl_sid(skb, asoc->base.sk->sk_family,
&peer_sid); &peer_sid);
if (err) if (err)
return err; return err;
@ -5383,7 +5383,7 @@ static int selinux_sctp_assoc_request(struct sctp_endpoint *ep,
*/ */
ad.type = LSM_AUDIT_DATA_NET; ad.type = LSM_AUDIT_DATA_NET;
ad.u.net = &net; ad.u.net = &net;
ad.u.net->sk = ep->base.sk; ad.u.net->sk = asoc->base.sk;
err = avc_has_perm(&selinux_state, err = avc_has_perm(&selinux_state,
sksec->peer_sid, peer_sid, sksec->sclass, sksec->peer_sid, peer_sid, sksec->sclass,
SCTP_SOCKET__ASSOCIATION, &ad); SCTP_SOCKET__ASSOCIATION, &ad);
@ -5392,7 +5392,7 @@ static int selinux_sctp_assoc_request(struct sctp_endpoint *ep,
} }
/* Compute the MLS component for the connection and store /* Compute the MLS component for the connection and store
* the information in ep. This will be used by SCTP TCP type * the information in asoc. This will be used by SCTP TCP type
* sockets and peeled off connections as they cause a new * sockets and peeled off connections as they cause a new
* socket to be generated. selinux_sctp_sk_clone() will then * socket to be generated. selinux_sctp_sk_clone() will then
* plug this into the new socket. * plug this into the new socket.
@ -5401,11 +5401,11 @@ static int selinux_sctp_assoc_request(struct sctp_endpoint *ep,
if (err) if (err)
return err; return err;
ep->secid = conn_sid; asoc->secid = conn_sid;
ep->peer_secid = peer_sid; asoc->peer_secid = peer_sid;
/* Set any NetLabel labels including CIPSO/CALIPSO options. */ /* Set any NetLabel labels including CIPSO/CALIPSO options. */
return selinux_netlbl_sctp_assoc_request(ep, skb); return selinux_netlbl_sctp_assoc_request(asoc, skb);
} }
/* Check if sctp IPv4/IPv6 addresses are valid for binding or connecting /* Check if sctp IPv4/IPv6 addresses are valid for binding or connecting
@ -5490,7 +5490,7 @@ static int selinux_sctp_bind_connect(struct sock *sk, int optname,
} }
/* Called whenever a new socket is created by accept(2) or sctp_peeloff(3). */ /* Called whenever a new socket is created by accept(2) or sctp_peeloff(3). */
static void selinux_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, static void selinux_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
struct sock *newsk) struct sock *newsk)
{ {
struct sk_security_struct *sksec = sk->sk_security; struct sk_security_struct *sksec = sk->sk_security;
@ -5502,8 +5502,8 @@ static void selinux_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
if (!selinux_policycap_extsockclass()) if (!selinux_policycap_extsockclass())
return selinux_sk_clone_security(sk, newsk); return selinux_sk_clone_security(sk, newsk);
newsksec->sid = ep->secid; newsksec->sid = asoc->secid;
newsksec->peer_sid = ep->peer_secid; newsksec->peer_sid = asoc->peer_secid;
newsksec->sclass = sksec->sclass; newsksec->sclass = sksec->sclass;
selinux_netlbl_sctp_sk_clone(sk, newsk); selinux_netlbl_sctp_sk_clone(sk, newsk);
} }

4
security/selinux/include/netlabel.h
View file

@ -39,7 +39,7 @@ int selinux_netlbl_skbuff_getsid(struct sk_buff *skb,
int selinux_netlbl_skbuff_setsid(struct sk_buff *skb, int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
u16 family, u16 family,
u32 sid); u32 sid);
int selinux_netlbl_sctp_assoc_request(struct sctp_endpoint *ep, int selinux_netlbl_sctp_assoc_request(struct sctp_association *asoc,
struct sk_buff *skb); struct sk_buff *skb);
int selinux_netlbl_inet_conn_request(struct request_sock *req, u16 family); int selinux_netlbl_inet_conn_request(struct request_sock *req, u16 family);
void selinux_netlbl_inet_csk_clone(struct sock *sk, u16 family); void selinux_netlbl_inet_csk_clone(struct sock *sk, u16 family);
@ -98,7 +98,7 @@ static inline int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
return 0; return 0;
} }
static inline int selinux_netlbl_sctp_assoc_request(struct sctp_endpoint *ep, static inline int selinux_netlbl_sctp_assoc_request(struct sctp_association *asoc,
struct sk_buff *skb) struct sk_buff *skb)
{ {
return 0; return 0;

18
security/selinux/netlabel.c
View file

@ -261,30 +261,30 @@ int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
/** /**
* selinux_netlbl_sctp_assoc_request - Label an incoming sctp association. * selinux_netlbl_sctp_assoc_request - Label an incoming sctp association.
* @ep: incoming association endpoint. * @asoc: incoming association.
* @skb: the packet. * @skb: the packet.
* *
* Description: * Description:
* A new incoming connection is represented by @ep, ...... * A new incoming connection is represented by @asoc, ......
* Returns zero on success, negative values on failure. * Returns zero on success, negative values on failure.
* *
*/ */
int selinux_netlbl_sctp_assoc_request(struct sctp_endpoint *ep, int selinux_netlbl_sctp_assoc_request(struct sctp_association *asoc,
struct sk_buff *skb) struct sk_buff *skb)
{ {
int rc; int rc;
struct netlbl_lsm_secattr secattr; struct netlbl_lsm_secattr secattr;
struct sk_security_struct *sksec = ep->base.sk->sk_security; struct sk_security_struct *sksec = asoc->base.sk->sk_security;
struct sockaddr_in addr4; struct sockaddr_in addr4;
struct sockaddr_in6 addr6; struct sockaddr_in6 addr6;
if (ep->base.sk->sk_family != PF_INET && if (asoc->base.sk->sk_family != PF_INET &&
ep->base.sk->sk_family != PF_INET6) asoc->base.sk->sk_family != PF_INET6)
return 0; return 0;
netlbl_secattr_init(&secattr); netlbl_secattr_init(&secattr);
rc = security_netlbl_sid_to_secattr(&selinux_state, rc = security_netlbl_sid_to_secattr(&selinux_state,
ep->secid, &secattr); asoc->secid, &secattr);
if (rc != 0) if (rc != 0)
goto assoc_request_return; goto assoc_request_return;
@ -294,11 +294,11 @@ int selinux_netlbl_sctp_assoc_request(struct sctp_endpoint *ep,
if (ip_hdr(skb)->version == 4) { if (ip_hdr(skb)->version == 4) {
addr4.sin_family = AF_INET; addr4.sin_family = AF_INET;
addr4.sin_addr.s_addr = ip_hdr(skb)->saddr; addr4.sin_addr.s_addr = ip_hdr(skb)->saddr;
rc = netlbl_conn_setattr(ep->base.sk, (void *)&addr4, &secattr); rc = netlbl_conn_setattr(asoc->base.sk, (void *)&addr4, &secattr);
} else if (IS_ENABLED(CONFIG_IPV6) && ip_hdr(skb)->version == 6) { } else if (IS_ENABLED(CONFIG_IPV6) && ip_hdr(skb)->version == 6) {
addr6.sin6_family = AF_INET6; addr6.sin6_family = AF_INET6;
addr6.sin6_addr = ipv6_hdr(skb)->saddr; addr6.sin6_addr = ipv6_hdr(skb)->saddr;
rc = netlbl_conn_setattr(ep->base.sk, (void *)&addr6, &secattr); rc = netlbl_conn_setattr(asoc->base.sk, (void *)&addr6, &secattr);
} else { } else {
rc = -EAFNOSUPPORT; rc = -EAFNOSUPPORT;
} }