diff options
| -rw-r--r-- | security/smack/smackfs.c | 52 |
1 files changed, 22 insertions, 30 deletions
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c index 3e4242617eea..e40dc48737ff 100644 --- a/security/smack/smackfs.c +++ b/security/smack/smackfs.c @@ -566,23 +566,17 @@ static void *smk_seq_start(struct seq_file *s, loff_t *pos, struct list_head *head) { struct list_head *list; + int i = *pos; + + rcu_read_lock(); + for (list = rcu_dereference(list_next_rcu(head)); + list != head; + list = rcu_dereference(list_next_rcu(list))) { + if (i-- == 0) + return list; + } - /* - * This is 0 the first time through. - */ - if (s->index == 0) - s->private = head; - - if (s->private == NULL) - return NULL; - - list = s->private; - if (list_empty(list)) - return NULL; - - if (s->index == 0) - return list->next; - return list; + return NULL; } static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos, @@ -590,17 +584,15 @@ static void *smk_seq_next(struct seq_file *s, void *v, loff_t *pos, { struct list_head *list = v; - if (list_is_last(list, head)) { - s->private = NULL; - return NULL; - } - s->private = list->next; - return list->next; + ++*pos; + list = rcu_dereference(list_next_rcu(list)); + + return (list == head) ? NULL : list; } static void smk_seq_stop(struct seq_file *s, void *v) { - /* No-op */ + rcu_read_unlock(); } static void smk_rule_show(struct seq_file *s, struct smack_rule *srp, int max) @@ -660,7 +652,7 @@ static int load_seq_show(struct seq_file *s, void *v) { struct list_head *list = v; struct smack_master_list *smlp = - list_entry(list, struct smack_master_list, list); + list_entry_rcu(list, struct smack_master_list, list); smk_rule_show(s, smlp->smk_rule, SMK_LABELLEN); @@ -808,7 +800,7 @@ static int cipso_seq_show(struct seq_file *s, void *v) { struct list_head *list = v; struct smack_known *skp = - list_entry(list, struct smack_known, list); + list_entry_rcu(list, struct smack_known, list); struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat; char sep = '/'; int i; @@ -999,7 +991,7 @@ static int cipso2_seq_show(struct seq_file *s, void *v) { struct list_head *list = v; struct smack_known *skp = - list_entry(list, struct smack_known, list); + list_entry_rcu(list, struct smack_known, list); struct netlbl_lsm_catmap *cmp = skp->smk_netlabel.attr.mls.cat; char sep = '/'; int i; @@ -1083,7 +1075,7 @@ static int netlbladdr_seq_show(struct seq_file *s, void *v) { struct list_head *list = v; struct smk_netlbladdr *skp = - list_entry(list, struct smk_netlbladdr, list); + list_entry_rcu(list, struct smk_netlbladdr, list); unsigned char *hp = (char *) &skp->smk_host.sin_addr.s_addr; int maskn; u32 temp_mask = be32_to_cpu(skp->smk_mask.s_addr); @@ -1917,7 +1909,7 @@ static int load_self_seq_show(struct seq_file *s, void *v) { struct list_head *list = v; struct smack_rule *srp = - list_entry(list, struct smack_rule, list); + list_entry_rcu(list, struct smack_rule, list); smk_rule_show(s, srp, SMK_LABELLEN); @@ -2046,7 +2038,7 @@ static int load2_seq_show(struct seq_file *s, void *v) { struct list_head *list = v; struct smack_master_list *smlp = - list_entry(list, struct smack_master_list, list); + list_entry_rcu(list, struct smack_master_list, list); smk_rule_show(s, smlp->smk_rule, SMK_LONGLABEL); @@ -2123,7 +2115,7 @@ static int load_self2_seq_show(struct seq_file *s, void *v) { struct list_head *list = v; struct smack_rule *srp = - list_entry(list, struct smack_rule, list); + list_entry_rcu(list, struct smack_rule, list); smk_rule_show(s, srp, SMK_LONGLABEL); |