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authorMat Martineau <mathew.j.martineau@linux.intel.com>2016-08-31 16:05:43 -0700
committerMat Martineau <mathew.j.martineau@linux.intel.com>2017-04-04 14:10:10 -0700
commit2b6aa412ff23a02ac777ad307249c60a839cfd25 (patch)
tree317dced64727a10b3ce09ca84ac8e153c7dabf77 /security/integrity/digsig.c
parente9cc0f689a7c0c9be6fed6861b3a3f49ad0e7a52 (diff)
KEYS: Use structure to capture key restriction function and data
Replace struct key's restrict_link function pointer with a pointer to the new struct key_restriction. The structure contains pointers to the restriction function as well as relevant data for evaluating the restriction. The garbage collector checks restrict_link->keytype when key types are unregistered. Restrictions involving a removed key type are converted to use restrict_link_reject so that restrictions cannot be removed by unregistering key types. Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Diffstat (limited to 'security/integrity/digsig.c')
-rw-r--r--security/integrity/digsig.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 106e855e2d9d..06554c448dce 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -81,18 +81,25 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
int __init integrity_init_keyring(const unsigned int id)
{
const struct cred *cred = current_cred();
+ struct key_restriction *restriction;
int err = 0;
if (!init_keyring)
return 0;
+ restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
+ if (!restriction)
+ return -ENOMEM;
+
+ restriction->check = restrict_link_to_ima;
+
keyring[id] = keyring_alloc(keyring_name[id], KUIDT_INIT(0),
KGIDT_INIT(0), cred,
((KEY_POS_ALL & ~KEY_POS_SETATTR) |
KEY_USR_VIEW | KEY_USR_READ |
KEY_USR_WRITE | KEY_USR_SEARCH),
KEY_ALLOC_NOT_IN_QUOTA,
- restrict_link_to_ima, NULL);
+ restriction, NULL);
if (IS_ERR(keyring[id])) {
err = PTR_ERR(keyring[id]);
pr_info("Can't allocate %s keyring (%d)\n",