blob: 1d7ddcb9811b467087298e4ba8c21faeab06132f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
From: Matthew Garrett <matthew.garrett@nebula.com>
Date: Fri, 9 Aug 2013 17:58:15 -0400
Subject: [PATCH] Add secure_modules() call
Provide a single call to allow kernel code to determine whether the system
has been configured to either disable module loading entirely or to load
only modules signed with a trusted key.
Bugzilla: N/A
Upstream-status: Fedora mustard. Replaced by securelevels, but that was nak'd
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
---
include/linux/module.h | 6 ++++++
kernel/module.c | 10 ++++++++++
2 files changed, 16 insertions(+)
diff --git a/include/linux/module.h b/include/linux/module.h
index 7ffe0851d244..3da68fd1f657 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -515,6 +515,8 @@ static inline bool module_requested_async_probing(struct module *module)
return module && module->async_probe_requested;
}
+extern bool secure_modules(void);
+
#else /* !CONFIG_MODULES... */
/* Given an address, look for it in the exception tables. */
@@ -631,6 +633,10 @@ static inline bool module_requested_async_probing(struct module *module)
return false;
}
+static inline bool secure_modules(void)
+{
+ return false;
+}
#endif /* CONFIG_MODULES */
#ifdef CONFIG_SYSFS
diff --git a/kernel/module.c b/kernel/module.c
index f80a97f7da1f..5d3e6c6191fa 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3925,3 +3925,13 @@ void module_layout(struct module *mod,
}
EXPORT_SYMBOL(module_layout);
#endif
+
+bool secure_modules(void)
+{
+#ifdef CONFIG_MODULE_SIG
+ return (sig_enforce || modules_disabled);
+#else
+ return modules_disabled;
+#endif
+}
+EXPORT_SYMBOL(secure_modules);
|
