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authorDavid Howells <dhowells@redhat.com>2012-10-02 19:30:19 +0100
committerDavid Howells <dhowells@redhat.com>2012-10-02 19:30:19 +0100
commit4442d7704c7311d1c42383d365e0b883e0075975 (patch)
treeee80c095ea8b13c2ad62c9406ddc6166c5b09cb4 /security/keys/keyctl.c
parentf8aa23a55f813c9bddec2a6176e0e67274e6e7c1 (diff)
parentd4f65b5d2497b2fd9c45f06b71deb4ab084a5b66 (diff)
downloadlinaro-lsk-4442d7704c7311d1c42383d365e0b883e0075975.tar.gz
Merge branch 'modsign-keys-devel' into security-next-keys
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'security/keys/keyctl.c')
-rw-r--r--security/keys/keyctl.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 65b38417c21..6d9d0c74752 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -46,6 +46,9 @@ static int key_get_type_from_user(char *type,
* Extract the description of a new key from userspace and either add it as a
* new key to the specified keyring or update a matching key in that keyring.
*
+ * If the description is NULL or an empty string, the key type is asked to
+ * generate one from the payload.
+ *
* The keyring must be writable so that we can attach the key to it.
*
* If successful, the new key's serial number is returned, otherwise an error
@@ -72,10 +75,17 @@ SYSCALL_DEFINE5(add_key, const char __user *, _type,
if (ret < 0)
goto error;
- description = strndup_user(_description, PAGE_SIZE);
- if (IS_ERR(description)) {
- ret = PTR_ERR(description);
- goto error;
+ description = NULL;
+ if (_description) {
+ description = strndup_user(_description, PAGE_SIZE);
+ if (IS_ERR(description)) {
+ ret = PTR_ERR(description);
+ goto error;
+ }
+ if (!*description) {
+ kfree(description);
+ description = NULL;
+ }
}
/* pull the payload in if one was supplied */