diff options
Diffstat (limited to 'security/smack/smackfs.c')
-rw-r--r-- | security/smack/smackfs.c | 76 |
1 files changed, 45 insertions, 31 deletions
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c index 3c720ff..bce4e8f 100644 --- a/security/smack/smackfs.c +++ b/security/smack/smackfs.c @@ -131,14 +131,17 @@ LIST_HEAD(smack_rule_list); struct smack_parsed_rule { struct smack_known *smk_subject; - char *smk_object; + struct smack_known *smk_object; int smk_access1; int smk_access2; }; static int smk_cipso_doi_value = SMACK_CIPSO_DOI_DEFAULT; -const char *smack_cipso_option = SMACK_CIPSO_OPTION; +struct smack_known smack_cipso_option = { + .smk_known = SMACK_CIPSO_OPTION, + .smk_secid = 0, +}; /* * Values for parsing cipso rules @@ -304,6 +307,10 @@ static int smk_perm_from_str(const char *string) case 'L': perm |= MAY_LOCK; break; + case 'b': + case 'B': + perm |= MAY_BRINGUP; + break; default: return perm; } @@ -335,7 +342,7 @@ static int smk_fill_rule(const char *subject, const char *object, if (rule->smk_subject == NULL) return -EINVAL; - rule->smk_object = smk_import(object, len); + rule->smk_object = smk_import_entry(object, len); if (rule->smk_object == NULL) return -EINVAL; } else { @@ -355,7 +362,7 @@ static int smk_fill_rule(const char *subject, const char *object, kfree(cp); if (skp == NULL) return -ENOENT; - rule->smk_object = skp->smk_known; + rule->smk_object = skp; } rule->smk_access1 = smk_perm_from_str(access1); @@ -594,13 +601,15 @@ static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max) * anything you read back. */ if (strlen(srp->smk_subject->smk_known) >= max || - strlen(srp->smk_object) >= max) + strlen(srp->smk_object->smk_known) >= max) return; if (srp->smk_access == 0) return; - seq_printf(s, "%s %s", srp->smk_subject->smk_known, srp->smk_object); + seq_printf(s, "%s %s", + srp->smk_subject->smk_known, + srp->smk_object->smk_known); seq_putc(s, ' '); @@ -616,6 +625,8 @@ static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max) seq_putc(s, 't'); if (srp->smk_access & MAY_LOCK) seq_putc(s, 'l'); + if (srp->smk_access & MAY_BRINGUP) + seq_putc(s, 'b'); seq_putc(s, '\n'); } @@ -1067,7 +1078,7 @@ static int netlbladdr_seq_show(struct seq_file *s, void *v) for (maskn = 0; temp_mask; temp_mask <<= 1, maskn++); seq_printf(s, "%u.%u.%u.%u/%d %s\n", - hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label); + hp[0], hp[1], hp[2], hp[3], maskn, skp->smk_label->smk_known); return 0; } @@ -1147,10 +1158,10 @@ static void smk_netlbladdr_insert(struct smk_netlbladdr *new) static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { - struct smk_netlbladdr *skp; + struct smk_netlbladdr *snp; struct sockaddr_in newname; char *smack; - char *sp; + struct smack_known *skp; char *data; char *host = (char *)&newname.sin_addr.s_addr; int rc; @@ -1213,15 +1224,15 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, * If smack begins with '-', it is an option, don't import it */ if (smack[0] != '-') { - sp = smk_import(smack, 0); - if (sp == NULL) { + skp = smk_import_entry(smack, 0); + if (skp == NULL) { rc = -EINVAL; goto free_out; } } else { /* check known options */ - if (strcmp(smack, smack_cipso_option) == 0) - sp = (char *)smack_cipso_option; + if (strcmp(smack, smack_cipso_option.smk_known) == 0) + skp = &smack_cipso_option; else { rc = -EINVAL; goto free_out; @@ -1244,9 +1255,9 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, nsa = newname.sin_addr.s_addr; /* try to find if the prefix is already in the list */ found = 0; - list_for_each_entry_rcu(skp, &smk_netlbladdr_list, list) { - if (skp->smk_host.sin_addr.s_addr == nsa && - skp->smk_mask.s_addr == mask.s_addr) { + list_for_each_entry_rcu(snp, &smk_netlbladdr_list, list) { + if (snp->smk_host.sin_addr.s_addr == nsa && + snp->smk_mask.s_addr == mask.s_addr) { found = 1; break; } @@ -1254,26 +1265,26 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, smk_netlabel_audit_set(&audit_info); if (found == 0) { - skp = kzalloc(sizeof(*skp), GFP_KERNEL); - if (skp == NULL) + snp = kzalloc(sizeof(*snp), GFP_KERNEL); + if (snp == NULL) rc = -ENOMEM; else { rc = 0; - skp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr; - skp->smk_mask.s_addr = mask.s_addr; - skp->smk_label = sp; - smk_netlbladdr_insert(skp); + snp->smk_host.sin_addr.s_addr = newname.sin_addr.s_addr; + snp->smk_mask.s_addr = mask.s_addr; + snp->smk_label = skp; + smk_netlbladdr_insert(snp); } } else { /* we delete the unlabeled entry, only if the previous label * wasn't the special CIPSO option */ - if (skp->smk_label != smack_cipso_option) + if (snp->smk_label != &smack_cipso_option) rc = netlbl_cfg_unlbl_static_del(&init_net, NULL, - &skp->smk_host.sin_addr, &skp->smk_mask, + &snp->smk_host.sin_addr, &snp->smk_mask, PF_INET, &audit_info); else rc = 0; - skp->smk_label = sp; + snp->smk_label = skp; } /* @@ -1281,10 +1292,10 @@ static ssize_t smk_write_netlbladdr(struct file *file, const char __user *buf, * this host so that incoming packets get labeled. * but only if we didn't get the special CIPSO option */ - if (rc == 0 && sp != smack_cipso_option) + if (rc == 0 && skp != &smack_cipso_option) rc = netlbl_cfg_unlbl_static_add(&init_net, NULL, - &skp->smk_host.sin_addr, &skp->smk_mask, PF_INET, - smack_to_secid(skp->smk_label), &audit_info); + &snp->smk_host.sin_addr, &snp->smk_mask, PF_INET, + snp->smk_label->smk_secid, &audit_info); if (rc == 0) rc = count; @@ -1677,7 +1688,7 @@ static ssize_t smk_write_onlycap(struct file *file, const char __user *buf, if (smack_onlycap != NULL && smack_onlycap != skp) return -EPERM; - data = kzalloc(count, GFP_KERNEL); + data = kzalloc(count + 1, GFP_KERNEL); if (data == NULL) return -ENOMEM; @@ -1880,7 +1891,10 @@ static ssize_t smk_user_access(struct file *file, const char __user *buf, else if (res != -ENOENT) return -EINVAL; - data[0] = res == 0 ? '1' : '0'; + /* + * smk_access() can return a value > 0 in the "bringup" case. + */ + data[0] = res >= 0 ? '1' : '0'; data[1] = '\0'; simple_transaction_set(file, 2); @@ -2228,7 +2242,7 @@ static ssize_t smk_write_syslog(struct file *file, const char __user *buf, if (!smack_privileged(CAP_MAC_ADMIN)) return -EPERM; - data = kzalloc(count, GFP_KERNEL); + data = kzalloc(count + 1, GFP_KERNEL); if (data == NULL) return -ENOMEM; |