Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6.23

[pandora-kernel.git] / kernel / auditfilter.c

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 87865f8..359645c 100644 (file)
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -304,13 +304,52 @@ int __init audit_register_class(int class, unsigned *list)
 
 int audit_match_class(int class, unsigned syscall)
 {
-       if (unlikely(syscall >= AUDIT_BITMASK_SIZE * sizeof(__u32)))
+       if (unlikely(syscall >= AUDIT_BITMASK_SIZE * 32))
                return 0;
        if (unlikely(class >= AUDIT_SYSCALL_CLASSES || !classes[class]))
                return 0;
        return classes[class][AUDIT_WORD(syscall)] & AUDIT_BIT(syscall);
 }
 
+#ifdef CONFIG_AUDITSYSCALL
+static inline int audit_match_class_bits(int class, u32 *mask)
+{
+       int i;
+
+       if (classes[class]) {
+               for (i = 0; i < AUDIT_BITMASK_SIZE; i++)
+                       if (mask[i] & classes[class][i])
+                               return 0;
+       }
+       return 1;
+}
+
+static int audit_match_signal(struct audit_entry *entry)
+{
+       struct audit_field *arch = entry->rule.arch_f;
+
+       if (!arch) {
+               /* When arch is unspecified, we must check both masks on biarch
+                * as syscall number alone is ambiguous. */
+               return (audit_match_class_bits(AUDIT_CLASS_SIGNAL,
+                                              entry->rule.mask) &&
+                       audit_match_class_bits(AUDIT_CLASS_SIGNAL_32,
+                                              entry->rule.mask));
+       }
+
+       switch(audit_classify_arch(arch->val)) {
+       case 0: /* native */
+               return (audit_match_class_bits(AUDIT_CLASS_SIGNAL,
+                                              entry->rule.mask));
+       case 1: /* 32bit on biarch */
+               return (audit_match_class_bits(AUDIT_CLASS_SIGNAL_32,
+                                              entry->rule.mask));
+       default:
+               return 1;
+       }
+}
+#endif
+
 /* Common user-space to kernel rule translation. */
 static inline struct audit_entry *audit_to_entry_common(struct audit_rule *rule)
 {
@@ -417,6 +456,13 @@ static struct audit_entry *audit_rule_to_entry(struct audit_rule *rule)
                case AUDIT_DEVMINOR:
                case AUDIT_EXIT:
                case AUDIT_SUCCESS:
+                       /* bit ops are only useful on syscall args */
+                       if (f->op == AUDIT_BIT_MASK ||
+                                               f->op == AUDIT_BIT_TEST) {
+                               err = -EINVAL;
+                               goto exit_free;
+                       }
+                       break;
                case AUDIT_ARG0:
                case AUDIT_ARG1:
                case AUDIT_ARG2:
@@ -429,6 +475,7 @@ static struct audit_entry *audit_rule_to_entry(struct audit_rule *rule)
                                err = -EINVAL;
                                goto exit_free;
                        }
+                       entry->rule.arch_f = f;
                        break;
                case AUDIT_PERM:
                        if (f->val & ~15)
@@ -519,7 +566,6 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
                case AUDIT_FSGID:
                case AUDIT_LOGINUID:
                case AUDIT_PERS:
-               case AUDIT_ARCH:
                case AUDIT_MSGTYPE:
                case AUDIT_PPID:
                case AUDIT_DEVMAJOR:
@@ -531,6 +577,9 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
                case AUDIT_ARG2:
                case AUDIT_ARG3:
                        break;
+               case AUDIT_ARCH:
+                       entry->rule.arch_f = f;
+                       break;
                case AUDIT_SUBJ_USER:
                case AUDIT_SUBJ_ROLE:
                case AUDIT_SUBJ_TYPE:
@@ -905,7 +954,7 @@ static void audit_update_watch(struct audit_parent *parent,
 
                /* If the update involves invalidating rules, do the inode-based
                 * filtering now, so we don't omit records. */
-               if (invalidating &&
+               if (invalidating && current->audit_context &&
                    audit_filter_inodes(current, current->audit_context) == AUDIT_RECORD_CONTEXT)
                        audit_set_auditable(current->audit_context);
 
@@ -937,9 +986,10 @@ static void audit_update_watch(struct audit_parent *parent,
                }
 
                ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
-               audit_log_format(ab, "audit updated rules specifying path=");
+               audit_log_format(ab, "op=updated rules specifying path=");
                audit_log_untrustedstring(ab, owatch->path);
                audit_log_format(ab, " with dev=%u ino=%lu\n", dev, ino);
+               audit_log_format(ab, " list=%d res=1", r->listnr);
                audit_log_end(ab);
 
                audit_remove_watch(owatch);
@@ -969,14 +1019,14 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
                        e = container_of(r, struct audit_entry, rule);
 
                        ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
-                       audit_log_format(ab, "audit implicitly removed rule path=");
+                       audit_log_format(ab, "op=remove rule path=");
                        audit_log_untrustedstring(ab, w->path);
                        if (r->filterkey) {
                                audit_log_format(ab, " key=");
                                audit_log_untrustedstring(ab, r->filterkey);
                        } else
                                audit_log_format(ab, " key=(null)");
-                       audit_log_format(ab, " list=%d", r->listnr);
+                       audit_log_format(ab, " list=%d res=1", r->listnr);
                        audit_log_end(ab);
 
                        list_del(&r->rlist);
@@ -1167,8 +1217,8 @@ static inline int audit_add_rule(struct audit_entry *entry,
        struct audit_entry *e;
        struct audit_field *inode_f = entry->rule.inode_f;
        struct audit_watch *watch = entry->rule.watch;
-       struct nameidata *ndp, *ndw;
-       int h, err, putnd_needed = 0;
+       struct nameidata *ndp = NULL, *ndw = NULL;
+       int h, err;
 #ifdef CONFIG_AUDITSYSCALL
        int dont_count = 0;
 
@@ -1196,7 +1246,6 @@ static inline int audit_add_rule(struct audit_entry *entry,
                err = audit_get_nd(watch->path, &ndp, &ndw);
                if (err)
                        goto error;
-               putnd_needed = 1;
        }
 
        mutex_lock(&audit_filter_mutex);
@@ -1220,17 +1269,17 @@ static inline int audit_add_rule(struct audit_entry *entry,
 #ifdef CONFIG_AUDITSYSCALL
        if (!dont_count)
                audit_n_rules++;
+
+       if (!audit_match_signal(entry))
+               audit_signals++;
 #endif
        mutex_unlock(&audit_filter_mutex);
 
-       if (putnd_needed)
-               audit_put_nd(ndp, ndw);
-
+       audit_put_nd(ndp, ndw);         /* NULL args OK */
        return 0;
 
 error:
-       if (putnd_needed)
-               audit_put_nd(ndp, ndw);
+       audit_put_nd(ndp, ndw);         /* NULL args OK */
        if (watch)
                audit_put_watch(watch); /* tmp watch, matches initial get */
        return err;
@@ -1293,6 +1342,9 @@ static inline int audit_del_rule(struct audit_entry *entry,
 #ifdef CONFIG_AUDITSYSCALL
        if (!dont_count)
                audit_n_rules--;
+
+       if (!audit_match_signal(entry))
+               audit_signals--;
 #endif
        mutex_unlock(&audit_filter_mutex);
 
@@ -1410,7 +1462,7 @@ static void audit_log_rule_change(uid_t loginuid, u32 sid, char *action,
                        audit_log_format(ab, " subj=%s", ctx);
                kfree(ctx);
        }
-       audit_log_format(ab, " %s rule key=", action);
+       audit_log_format(ab, " op=%s rule key=", action);
        if (rule->filterkey)
                audit_log_untrustedstring(ab, rule->filterkey);
        else
@@ -1521,6 +1573,10 @@ int audit_comparator(const u32 left, const u32 op, const u32 right)
                return (left > right);
        case AUDIT_GREATER_THAN_OR_EQUAL:
                return (left >= right);
+       case AUDIT_BIT_MASK:
+               return (left & right);
+       case AUDIT_BIT_TEST:
+               return ((left & right) == right);
        }
        BUG();
        return 0;