/** * common_lsm_audit - generic LSM auditing function * @a: auxiliary audit data * @pre_audit: lsm-specific pre-audit callback * @post_audit: lsm-specific post-audit callback * * setup the audit buffer for common security information * uses callback to print LSM specific information */ void common_lsm_audit(struct common_audit_data *a, void (*pre_audit)(struct audit_buffer *, void *), void (*post_audit)(struct audit_buffer *, void *)) { struct audit_buffer *ab; if (a == NULL) return; /* we use GFP_ATOMIC so we won't sleep */ ab = audit_log_start(audit_context(), GFP_ATOMIC | __GFP_NOWARN, AUDIT_AVC); if (ab == NULL) return; if (pre_audit) pre_audit(ab, a); dump_common_audit_data(ab, a); if (post_audit) post_audit(ab, a); audit_log_end(ab); }
void common_lsm_audit(struct common_audit_data *a, void (*pre_audit)(struct audit_buffer *, void *), void (*post_audit)(struct audit_buffer *, void *)) { struct audit_buffer *ab; if (a == NULL) return; ab = audit_log_start(current->audit_context, GFP_ATOMIC, AUDIT_AVC); if (ab == NULL) return; if (pre_audit) pre_audit(ab, a); dump_common_audit_data(ab, a); if (post_audit) post_audit(ab, a); audit_log_end(ab); }
/** * dump_common_audit_data - helper to dump common audit data * @a : common audit data * */ static void dump_common_audit_data(struct audit_buffer *ab, struct common_audit_data *a) { struct task_struct *tsk = current; if (a->tsk) tsk = a->tsk; if (tsk && tsk->pid) { audit_log_format(ab, " pid=%d comm=", tsk->pid); audit_log_untrustedstring(ab, tsk->comm); } switch (a->type) { case LSM_AUDIT_DATA_NONE: return; case LSM_AUDIT_DATA_IPC: audit_log_format(ab, " key=%d ", a->u.ipc_id); break; case LSM_AUDIT_DATA_CAP: audit_log_format(ab, " capability=%d ", a->u.cap); break; case LSM_AUDIT_DATA_PATH: { struct inode *inode; audit_log_d_path(ab, " path=", &a->u.path); inode = a->u.path.dentry->d_inode; if (inode) { audit_log_format(ab, " dev="); audit_log_untrustedstring(ab, inode->i_sb->s_id); audit_log_format(ab, " ino=%lu", inode->i_ino); } break; } case LSM_AUDIT_DATA_DENTRY: { struct inode *inode; audit_log_format(ab, " name="); audit_log_untrustedstring(ab, a->u.dentry->d_name.name); inode = a->u.dentry->d_inode; if (inode) { audit_log_format(ab, " dev="); audit_log_untrustedstring(ab, inode->i_sb->s_id); audit_log_format(ab, " ino=%lu", inode->i_ino); } break; } case LSM_AUDIT_DATA_INODE: { struct dentry *dentry; struct inode *inode; inode = a->u.inode; dentry = d_find_alias(inode); if (dentry) { audit_log_format(ab, " name="); audit_log_untrustedstring(ab, dentry->d_name.name); dput(dentry); } audit_log_format(ab, " dev="); audit_log_untrustedstring(ab, inode->i_sb->s_id); audit_log_format(ab, " ino=%lu", inode->i_ino); break; } case LSM_AUDIT_DATA_TASK: tsk = a->u.tsk; if (tsk && tsk->pid) { audit_log_format(ab, " pid=%d comm=", tsk->pid); audit_log_untrustedstring(ab, tsk->comm); } break; case LSM_AUDIT_DATA_NET: if (a->u.net.sk) { struct sock *sk = a->u.net.sk; struct unix_sock *u; int len = 0; char *p = NULL; switch (sk->sk_family) { case AF_INET: { struct inet_sock *inet = inet_sk(sk); print_ipv4_addr(ab, inet->inet_rcv_saddr, inet->inet_sport, "laddr", "lport"); print_ipv4_addr(ab, inet->inet_daddr, inet->inet_dport, "faddr", "fport"); break; } case AF_INET6: { struct inet_sock *inet = inet_sk(sk); struct ipv6_pinfo *inet6 = inet6_sk(sk); print_ipv6_addr(ab, &inet6->rcv_saddr, inet->inet_sport, "laddr", "lport"); print_ipv6_addr(ab, &inet6->daddr, inet->inet_dport, "faddr", "fport"); break; } case AF_UNIX: u = unix_sk(sk); if (u->dentry) { struct path path = { .dentry = u->dentry, .mnt = u->mnt }; audit_log_d_path(ab, " path=", &path); break; } if (!u->addr) break; len = u->addr->len-sizeof(short); p = &u->addr->name->sun_path[0]; audit_log_format(ab, " path="); if (*p) audit_log_untrustedstring(ab, p); else audit_log_n_hex(ab, p, len); break; } } switch (a->u.net.family) { case AF_INET: print_ipv4_addr(ab, a->u.net.v4info.saddr, a->u.net.sport, "saddr", "src"); print_ipv4_addr(ab, a->u.net.v4info.daddr, a->u.net.dport, "daddr", "dest"); break; case AF_INET6: print_ipv6_addr(ab, &a->u.net.v6info.saddr, a->u.net.sport, "saddr", "src"); print_ipv6_addr(ab, &a->u.net.v6info.daddr, a->u.net.dport, "daddr", "dest"); break; } if (a->u.net.netif > 0) { struct net_device *dev; /* NOTE: we always use init's namespace */ dev = dev_get_by_index(&init_net, a->u.net.netif); if (dev) { audit_log_format(ab, " netif=%s", dev->name); dev_put(dev); } } break; #ifdef CONFIG_KEYS case LSM_AUDIT_DATA_KEY: audit_log_format(ab, " key_serial=%u", a->u.key_struct.key); if (a->u.key_struct.key_desc) { audit_log_format(ab, " key_desc="); audit_log_untrustedstring(ab, a->u.key_struct.key_desc); } break; #endif case LSM_AUDIT_DATA_KMOD: audit_log_format(ab, " kmod="); audit_log_untrustedstring(ab, a->u.kmod_name); break; } /* switch (a->type) */ } /** * common_lsm_audit - generic LSM auditing function * @a: auxiliary audit data * * setup the audit buffer for common security information * uses callback to print LSM specific information */ void common_lsm_audit(struct common_audit_data *a) { struct audit_buffer *ab; if (a == NULL) return; /* we use GFP_ATOMIC so we won't sleep */ ab = audit_log_start(current->audit_context, GFP_ATOMIC, AUDIT_AVC); if (ab == NULL) return; if (a->lsm_pre_audit) a->lsm_pre_audit(ab, a); dump_common_audit_data(ab, a); if (a->lsm_post_audit) a->lsm_post_audit(ab, a); audit_log_end(ab); }