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88fec3526e
When a unix socket is passed into a different confinement domain make
sure its cached mediation labeling is updated to correctly reflect
which domains are using the socket.
Fixes: c05e705812 ("apparmor: add fine grained af_unix mediation")
Signed-off-by: John Johansen <john.johansen@canonical.com>
119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* AppArmor security module
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*
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* This file contains AppArmor network mediation definitions.
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*
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* Copyright (C) 1998-2008 Novell/SUSE
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* Copyright 2009-2017 Canonical Ltd.
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*/
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#ifndef __AA_NET_H
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#define __AA_NET_H
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#include <net/sock.h>
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#include <linux/path.h>
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#include "apparmorfs.h"
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#include "label.h"
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#include "perms.h"
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#include "policy.h"
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#define AA_MAY_SEND AA_MAY_WRITE
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#define AA_MAY_RECEIVE AA_MAY_READ
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#define AA_MAY_SHUTDOWN AA_MAY_DELETE
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#define AA_MAY_CONNECT AA_MAY_OPEN
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#define AA_MAY_ACCEPT 0x00100000
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#define AA_MAY_BIND 0x00200000
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#define AA_MAY_LISTEN 0x00400000
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#define AA_MAY_SETOPT 0x01000000
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#define AA_MAY_GETOPT 0x02000000
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#define NET_PERMS_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE | \
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AA_MAY_SHUTDOWN | AA_MAY_BIND | AA_MAY_LISTEN | \
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AA_MAY_CONNECT | AA_MAY_ACCEPT | AA_MAY_SETATTR | \
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AA_MAY_GETATTR | AA_MAY_SETOPT | AA_MAY_GETOPT)
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#define NET_FS_PERMS (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE | \
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AA_MAY_SHUTDOWN | AA_MAY_CONNECT | AA_MAY_RENAME |\
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AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_CHMOD | \
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AA_MAY_CHOWN | AA_MAY_CHGRP | AA_MAY_LOCK | \
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AA_MAY_MPROT)
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#define NET_PEER_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CONNECT | \
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AA_MAY_ACCEPT)
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struct aa_sk_ctx {
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struct aa_label __rcu *label;
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struct aa_label __rcu *peer;
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struct aa_label __rcu *peer_lastupdate; /* ptr cmp only, no deref */
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};
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static inline struct aa_sk_ctx *aa_sock(const struct sock *sk)
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{
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return sk->sk_security + apparmor_blob_sizes.lbs_sock;
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}
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#define DEFINE_AUDIT_NET(NAME, OP, CRED, SK, F, T, P) \
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struct lsm_network_audit NAME ## _net = { .sk = (SK), \
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.family = (F)}; \
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DEFINE_AUDIT_DATA(NAME, \
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((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
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LSM_AUDIT_DATA_NONE, \
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AA_CLASS_NET, \
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OP); \
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NAME.common.u.net = &(NAME ## _net); \
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NAME.subj_cred = (CRED); \
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NAME.net.type = (T); \
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NAME.net.protocol = (P)
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#define DEFINE_AUDIT_SK(NAME, OP, CRED, SK) \
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DEFINE_AUDIT_NET(NAME, OP, CRED, SK, (SK)->sk_family, (SK)->sk_type, \
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(SK)->sk_protocol)
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struct aa_secmark {
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u8 audit;
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u8 deny;
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u32 secid;
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char *label;
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};
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extern struct aa_sfs_entry aa_sfs_entry_network[];
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extern struct aa_sfs_entry aa_sfs_entry_networkv9[];
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int aa_do_perms(struct aa_profile *profile, struct aa_policydb *policy,
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aa_state_t state, u32 request, struct aa_perms *p,
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struct apparmor_audit_data *ad);
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/* passing in state returned by XXX_mediates_AF() */
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aa_state_t aa_match_to_prot(struct aa_policydb *policy, aa_state_t state,
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u32 request, u16 af, int type, int protocol,
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struct aa_perms **p, const char **info);
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void audit_net_cb(struct audit_buffer *ab, void *va);
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int aa_profile_af_perm(struct aa_profile *profile,
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struct apparmor_audit_data *ad,
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u32 request, u16 family, int type, int protocol);
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int aa_af_perm(const struct cred *subj_cred, struct aa_label *label,
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const char *op, u32 request, u16 family,
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int type, int protocol);
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static inline int aa_profile_af_sk_perm(struct aa_profile *profile,
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struct apparmor_audit_data *ad,
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u32 request,
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struct sock *sk)
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{
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return aa_profile_af_perm(profile, ad, request, sk->sk_family,
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sk->sk_type, sk->sk_protocol);
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}
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int aa_sk_perm(const char *op, u32 request, struct sock *sk);
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int aa_sock_file_perm(const struct cred *subj_cred, struct aa_label *label,
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const char *op, u32 request,
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struct file *file);
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int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
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u32 secid, const struct sock *sk);
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#endif /* __AA_NET_H */
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