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-rw-r--r--include/linux/key.h2
-rw-r--r--security/keys/permission.c40
2 files changed, 17 insertions, 25 deletions
diff --git a/include/linux/key.h b/include/linux/key.h
index b145b054b3e..5231800770e 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -242,7 +242,7 @@ extern struct key *request_key_async_with_auxdata(struct key_type *type,
extern int wait_for_key_construction(struct key *key, bool intr);
-extern int key_validate(struct key *key);
+extern int key_validate(const struct key *key);
extern key_ref_t key_create_or_update(key_ref_t keyring,
const char *type,
diff --git a/security/keys/permission.c b/security/keys/permission.c
index 5f4c00c0947..57d96363d7f 100644
--- a/security/keys/permission.c
+++ b/security/keys/permission.c
@@ -91,33 +91,25 @@ EXPORT_SYMBOL(key_task_permission);
* key is invalidated, -EKEYREVOKED if the key's type has been removed or if
* the key has been revoked or -EKEYEXPIRED if the key has expired.
*/
-int key_validate(struct key *key)
+int key_validate(const struct key *key)
{
- struct timespec now;
unsigned long flags = key->flags;
- int ret = 0;
-
- if (key) {
- ret = -ENOKEY;
- if (flags & (1 << KEY_FLAG_INVALIDATED))
- goto error;
-
- /* check it's still accessible */
- ret = -EKEYREVOKED;
- if (flags & ((1 << KEY_FLAG_REVOKED) |
- (1 << KEY_FLAG_DEAD)))
- goto error;
-
- /* check it hasn't expired */
- ret = 0;
- if (key->expiry) {
- now = current_kernel_time();
- if (now.tv_sec >= key->expiry)
- ret = -EKEYEXPIRED;
- }
+
+ if (flags & (1 << KEY_FLAG_INVALIDATED))
+ return -ENOKEY;
+
+ /* check it's still accessible */
+ if (flags & ((1 << KEY_FLAG_REVOKED) |
+ (1 << KEY_FLAG_DEAD)))
+ return -EKEYREVOKED;
+
+ /* check it hasn't expired */
+ if (key->expiry) {
+ struct timespec now = current_kernel_time();
+ if (now.tv_sec >= key->expiry)
+ return -EKEYEXPIRED;
}
-error:
- return ret;
+ return 0;
}
EXPORT_SYMBOL(key_validate);