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-rw-r--r--include/linux/audit.h1
-rw-r--r--include/uapi/linux/audit.h5
-rw-r--r--kernel/audit.h4
-rw-r--r--kernel/audit_tree.c2
-rw-r--r--kernel/audit_watch.c31
-rw-r--r--kernel/auditfilter.c53
-rw-r--r--kernel/auditsc.c3
7 files changed, 97 insertions, 2 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 759feb0e9d13..b2abc996c25d 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -62,6 +62,7 @@ struct audit_krule {
struct audit_field *inode_f; /* quick access to an inode field */
struct audit_watch *watch; /* associated watch */
struct audit_tree *tree; /* associated watched tree */
+ struct audit_fsnotify_mark *exe;
struct list_head rlist; /* entry in audit_{watch,tree}.rules list */
struct list_head list; /* for AUDIT_LIST* purposes only */
u64 prio;
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index d3475e1f15ec..f6ff62c24aba 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -266,6 +266,7 @@
#define AUDIT_OBJ_UID 109
#define AUDIT_OBJ_GID 110
#define AUDIT_FIELD_COMPARE 111
+#define AUDIT_EXE 112
#define AUDIT_ARG0 200
#define AUDIT_ARG1 (AUDIT_ARG0+1)
@@ -324,8 +325,10 @@ enum {
#define AUDIT_FEATURE_BITMAP_BACKLOG_LIMIT 0x00000001
#define AUDIT_FEATURE_BITMAP_BACKLOG_WAIT_TIME 0x00000002
+#define AUDIT_FEATURE_BITMAP_EXECUTABLE_PATH 0x00000004
#define AUDIT_FEATURE_BITMAP_ALL (AUDIT_FEATURE_BITMAP_BACKLOG_LIMIT | \
- AUDIT_FEATURE_BITMAP_BACKLOG_WAIT_TIME)
+ AUDIT_FEATURE_BITMAP_BACKLOG_WAIT_TIME | \
+ AUDIT_FEATURE_BITMAP_EXECUTABLE_PATH)
/* deprecated: AUDIT_VERSION_* */
#define AUDIT_VERSION_LATEST AUDIT_FEATURE_BITMAP_ALL
diff --git a/kernel/audit.h b/kernel/audit.h
index 7102d538737b..24ec86145667 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -274,6 +274,8 @@ extern char *audit_mark_path(struct audit_fsnotify_mark *mark);
extern void audit_remove_mark(struct audit_fsnotify_mark *audit_mark);
extern void audit_remove_mark_rule(struct audit_krule *krule);
extern int audit_mark_compare(struct audit_fsnotify_mark *mark, unsigned long ino, dev_t dev);
+extern int audit_dupe_exe(struct audit_krule *new, struct audit_krule *old);
+extern int audit_exe_compare(struct task_struct *tsk, struct audit_fsnotify_mark *mark);
#else
#define audit_put_watch(w) {}
@@ -289,6 +291,8 @@ extern int audit_mark_compare(struct audit_fsnotify_mark *mark, unsigned long in
#define audit_remove_mark(m)
#define audit_remove_mark_rule(k)
#define audit_mark_compare(m, i, d) 0
+#define audit_exe_compare(t, m) (-EINVAL)
+#define audit_dupe_exe(n, o) (-EINVAL)
#endif /* CONFIG_AUDIT_WATCH */
#ifdef CONFIG_AUDIT_TREE
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 2e0c97427b33..f41722506808 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -478,6 +478,8 @@ static void kill_rules(struct audit_tree *tree)
if (rule->tree) {
/* not a half-baked one */
audit_tree_log_remove_rule(rule);
+ if (entry->rule.exe)
+ audit_remove_mark(entry->rule.exe);
rule->tree = NULL;
list_del_rcu(&entry->list);
list_del(&entry->rule.list);
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 645c6884cee5..27ef8dcf7cd8 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -312,6 +312,8 @@ static void audit_update_watch(struct audit_parent *parent,
list_replace(&oentry->rule.list,
&nentry->rule.list);
}
+ if (oentry->rule.exe)
+ audit_remove_mark(oentry->rule.exe);
audit_watch_log_rule_change(r, owatch, "updated_rules");
@@ -342,6 +344,8 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
list_for_each_entry_safe(r, nextr, &w->rules, rlist) {
e = container_of(r, struct audit_entry, rule);
audit_watch_log_rule_change(r, w, "remove_rule");
+ if (e->rule.exe)
+ audit_remove_mark(e->rule.exe);
list_del(&r->rlist);
list_del(&r->list);
list_del_rcu(&e->list);
@@ -514,3 +518,30 @@ static int __init audit_watch_init(void)
return 0;
}
device_initcall(audit_watch_init);
+
+int audit_dupe_exe(struct audit_krule *new, struct audit_krule *old)
+{
+ struct audit_fsnotify_mark *audit_mark;
+ char *pathname;
+
+ pathname = kstrdup(audit_mark_path(old->exe), GFP_KERNEL);
+ if (!pathname)
+ return -ENOMEM;
+
+ audit_mark = audit_alloc_mark(new, pathname, strlen(pathname));
+ if (IS_ERR(audit_mark)) {
+ kfree(pathname);
+ return PTR_ERR(audit_mark);
+ }
+ new->exe = audit_mark;
+
+ return 0;
+}
+
+int audit_exe_compare(struct task_struct *tsk, struct audit_fsnotify_mark *mark)
+{
+ unsigned long ino = tsk->mm->exe_file->f_inode->i_ino;
+ dev_t dev = tsk->mm->exe_file->f_inode->i_sb->s_dev;
+
+ return audit_mark_compare(mark, ino, dev);
+}
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index b4d8c366ec30..7714d93edb85 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -405,6 +405,12 @@ static int audit_field_valid(struct audit_entry *entry, struct audit_field *f)
if (f->val > AUDIT_MAX_FIELD_COMPARE)
return -EINVAL;
break;
+ case AUDIT_EXE:
+ if (f->op != Audit_equal)
+ return -EINVAL;
+ if (entry->rule.listnr != AUDIT_FILTER_EXIT)
+ return -EINVAL;
+ break;
};
return 0;
}
@@ -419,6 +425,7 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
size_t remain = datasz - sizeof(struct audit_rule_data);
int i;
char *str;
+ struct audit_fsnotify_mark *audit_mark;
entry = audit_to_entry_common(data);
if (IS_ERR(entry))
@@ -539,6 +546,24 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
entry->rule.buflen += f->val;
entry->rule.filterkey = str;
break;
+ case AUDIT_EXE:
+ if (entry->rule.exe || f->val > PATH_MAX)
+ goto exit_free;
+ str = audit_unpack_string(&bufp, &remain, f->val);
+ if (IS_ERR(str)) {
+ err = PTR_ERR(str);
+ goto exit_free;
+ }
+ entry->rule.buflen += f->val;
+
+ audit_mark = audit_alloc_mark(&entry->rule, str, f->val);
+ if (IS_ERR(audit_mark)) {
+ kfree(str);
+ err = PTR_ERR(audit_mark);
+ goto exit_free;
+ }
+ entry->rule.exe = audit_mark;
+ break;
}
}
@@ -551,6 +576,8 @@ exit_nofree:
exit_free:
if (entry->rule.tree)
audit_put_tree(entry->rule.tree); /* that's the temporary one */
+ if (entry->rule.exe)
+ audit_remove_mark(entry->rule.exe); /* that's the template one */
audit_free_rule(entry);
return ERR_PTR(err);
}
@@ -615,6 +642,10 @@ static struct audit_rule_data *audit_krule_to_data(struct audit_krule *krule)
data->buflen += data->values[i] =
audit_pack_string(&bufp, krule->filterkey);
break;
+ case AUDIT_EXE:
+ data->buflen += data->values[i] =
+ audit_pack_string(&bufp, audit_mark_path(krule->exe));
+ break;
case AUDIT_LOGINUID_SET:
if (krule->pflags & AUDIT_LOGINUID_LEGACY && !f->val) {
data->fields[i] = AUDIT_LOGINUID;
@@ -678,6 +709,12 @@ static int audit_compare_rule(struct audit_krule *a, struct audit_krule *b)
if (strcmp(a->filterkey, b->filterkey))
return 1;
break;
+ case AUDIT_EXE:
+ /* both paths exist based on above type compare */
+ if (strcmp(audit_mark_path(a->exe),
+ audit_mark_path(b->exe)))
+ return 1;
+ break;
case AUDIT_UID:
case AUDIT_EUID:
case AUDIT_SUID:
@@ -799,8 +836,14 @@ struct audit_entry *audit_dupe_rule(struct audit_krule *old)
err = -ENOMEM;
else
new->filterkey = fk;
+ break;
+ case AUDIT_EXE:
+ err = audit_dupe_exe(new, old);
+ break;
}
if (err) {
+ if (new->exe)
+ audit_remove_mark(new->exe);
audit_free_rule(entry);
return ERR_PTR(err);
}
@@ -963,6 +1006,9 @@ int audit_del_rule(struct audit_entry *entry)
if (e->rule.tree)
audit_remove_tree_rule(&e->rule);
+ if (e->rule.exe)
+ audit_remove_mark_rule(&e->rule);
+
#ifdef CONFIG_AUDITSYSCALL
if (!dont_count)
audit_n_rules--;
@@ -1067,8 +1113,11 @@ int audit_rule_change(int type, __u32 portid, int seq, void *data,
WARN_ON(1);
}
- if (err || type == AUDIT_DEL_RULE)
+ if (err || type == AUDIT_DEL_RULE) {
+ if (entry->rule.exe)
+ audit_remove_mark(entry->rule.exe);
audit_free_rule(entry);
+ }
return err;
}
@@ -1360,6 +1409,8 @@ static int update_lsm_rule(struct audit_krule *r)
return 0;
nentry = audit_dupe_rule(r);
+ if (entry->rule.exe)
+ audit_remove_mark(entry->rule.exe);
if (IS_ERR(nentry)) {
/* save the first error encountered for the
* return value */
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ea3fe2b748a8..9b56b7ae053f 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -466,6 +466,9 @@ static int audit_filter_rules(struct task_struct *tsk,
result = audit_comparator(ctx->ppid, f->op, f->val);
}
break;
+ case AUDIT_EXE:
+ result = audit_exe_compare(tsk, rule->exe);
+ break;
case AUDIT_UID:
result = audit_uid_comparator(cred->uid, f->op, f->uid);
break;
generated by cgit (git 2.34.1) at 2024-05-22 00:19:58 +0000