linux-kernel - [PATCH 23/25] MODSIGN: Panic the kernel if FIPS is enabled upon module signing failure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 16 Aug 2012 02:38:24 +0100
From:	David Howells <dhowells@...hat.com>
To:	rusty@...tcorp.com.au
Cc:	dhowells@...hat.com, dmitry.kasatkin@...el.com,
	zohar@...ux.vnet.ibm.com, jmorris@...ei.org,
	keyrings@...ux-nfs.org, linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 23/25] MODSIGN: Panic the kernel if FIPS is enabled upon
 module signing failure

If module signing fails when the kernel is running with FIPS enabled then the
kernel should panic lest the crypto layer be compromised.  Possibly a panic
shouldn't happen on cases like ENOMEM.

Reported-by: Stephan Mueller <stephan.mueller@...ec.com>
Signed-off-by: David Howells <dhowells@...hat.com>
---

 kernel/module-verify.c |    5 +++++
 1 file changed, 5 insertions(+)


diff --git a/kernel/module-verify.c b/kernel/module-verify.c
index 6684e24..070d730 100644
--- a/kernel/module-verify.c
+++ b/kernel/module-verify.c
@@ -19,6 +19,7 @@
 #include <linux/sched.h>
 #include <linux/modsign.h>
 #include <linux/moduleparam.h>
+#include <linux/fips.h>
 #include <keys/crypto-type.h>
 #include "module-verify.h"
 
@@ -97,6 +98,10 @@ int module_verify(const void *data, size_t size, bool *_gpgsig_ok)
 
 	pr_devel("module_verify_signature() = %d\n", ret);
 
+        if (ret < 0 && fips_enabled)
+                panic("Module verification failed with error %d in FIPS mode\n",
+                      ret);
+
 	switch (ret) {
 	case 0:			/* Good signature */
 		*_gpgsig_ok = true;

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/