* [PATCH 4.9 41/63] Replace magic for trusting the secondary keyring with #define
[not found] <20180907211012.965501324@linuxfoundation.org>
@ 2018-09-07 21:10 ` Greg Kroah-Hartman
2018-09-07 21:10 ` [PATCH 4.9 42/63] Fix kexec forbidding kernels signed with keys in the secondary keyring to boot Greg Kroah-Hartman
1 sibling, 0 replies; 2+ messages in thread
From: Greg Kroah-Hartman @ 2018-09-07 21:10 UTC (permalink / raw)
To: linux-security-module
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yannik Sembritzki <yannik@sembritzki.me>
commit 817aef260037f33ee0f44c17fe341323d3aebd6d upstream.
Replace the use of a magic number that indicates that verify_*_signature()
should use the secondary keyring with a symbol.
Signed-off-by: Yannik Sembritzki <yannik@sembritzki.me>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: keyrings at vger.kernel.org
Cc: linux-security-module at vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
certs/system_keyring.c | 3 ++-
crypto/asymmetric_keys/pkcs7_key_type.c | 2 +-
include/linux/verification.h | 6 ++++++
3 files changed, 9 insertions(+), 2 deletions(-)
--- a/certs/system_keyring.c
+++ b/certs/system_keyring.c
@@ -14,6 +14,7 @@
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/err.h>
+#include <linux/verification.h>
#include <keys/asymmetric-type.h>
#include <keys/system_keyring.h>
#include <crypto/pkcs7.h>
@@ -207,7 +208,7 @@ int verify_pkcs7_signature(const void *d
if (!trusted_keys) {
trusted_keys = builtin_trusted_keys;
- } else if (trusted_keys == (void *)1UL) {
+ } else if (trusted_keys == VERIFY_USE_SECONDARY_KEYRING) {
#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
trusted_keys = secondary_trusted_keys;
#else
--- a/crypto/asymmetric_keys/pkcs7_key_type.c
+++ b/crypto/asymmetric_keys/pkcs7_key_type.c
@@ -62,7 +62,7 @@ static int pkcs7_preparse(struct key_pre
return verify_pkcs7_signature(NULL, 0,
prep->data, prep->datalen,
- (void *)1UL, usage,
+ VERIFY_USE_SECONDARY_KEYRING, usage,
pkcs7_view_content, prep);
}
--- a/include/linux/verification.h
+++ b/include/linux/verification.h
@@ -13,6 +13,12 @@
#define _LINUX_VERIFICATION_H
/*
+ * Indicate that both builtin trusted keys and secondary trusted keys
+ * should be used.
+ */
+#define VERIFY_USE_SECONDARY_KEYRING ((struct key *)1UL)
+
+/*
* The use to which an asymmetric key is being put.
*/
enum key_being_used_for {
^ permalink raw reply [flat|nested] 2+ messages in thread* [PATCH 4.9 42/63] Fix kexec forbidding kernels signed with keys in the secondary keyring to boot
[not found] <20180907211012.965501324@linuxfoundation.org>
2018-09-07 21:10 ` [PATCH 4.9 41/63] Replace magic for trusting the secondary keyring with #define Greg Kroah-Hartman
@ 2018-09-07 21:10 ` Greg Kroah-Hartman
1 sibling, 0 replies; 2+ messages in thread
From: Greg Kroah-Hartman @ 2018-09-07 21:10 UTC (permalink / raw)
To: linux-security-module
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yannik Sembritzki <yannik@sembritzki.me>
commit ea93102f32244e3f45c8b26260be77ed0cc1d16c upstream.
The split of .system_keyring into .builtin_trusted_keys and
.secondary_trusted_keys broke kexec, thereby preventing kernels signed by
keys which are now in the secondary keyring from being kexec'd.
Fix this by passing VERIFY_USE_SECONDARY_KEYRING to
verify_pefile_signature().
Fixes: d3bfe84129f6 ("certs: Add a secondary system keyring that can be added to dynamically")
Signed-off-by: Yannik Sembritzki <yannik@sembritzki.me>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: kexec at lists.infradead.org
Cc: keyrings at vger.kernel.org
Cc: linux-security-module at vger.kernel.org
Cc: stable at kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kernel/kexec-bzimage64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/kexec-bzimage64.c
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -529,7 +529,7 @@ static int bzImage64_cleanup(void *loade
static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len)
{
return verify_pefile_signature(kernel, kernel_len,
- NULL,
+ VERIFY_USE_SECONDARY_KEYRING,
VERIFYING_KEXEC_PE_SIGNATURE);
}
#endif
^ permalink raw reply [flat|nested] 2+ messages in thread