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-rw-r--r--security/keys/process_keys.c26
1 files changed, 17 insertions, 9 deletions
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 9de5dc59827..b58d9389274 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -46,9 +46,11 @@ int install_user_keyrings(void)
struct user_struct *user;
const struct cred *cred;
struct key *uid_keyring, *session_keyring;
+ key_perm_t user_keyring_perm;
char buf[20];
int ret;
+ user_keyring_perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_ALL;
cred = current_cred();
user = cred->user;
@@ -72,8 +74,8 @@ int install_user_keyrings(void)
uid_keyring = find_keyring_by_name(buf, true);
if (IS_ERR(uid_keyring)) {
uid_keyring = keyring_alloc(buf, user->uid, (gid_t) -1,
- cred, KEY_ALLOC_IN_QUOTA,
- NULL);
+ cred, user_keyring_perm,
+ KEY_ALLOC_IN_QUOTA, NULL);
if (IS_ERR(uid_keyring)) {
ret = PTR_ERR(uid_keyring);
goto error;
@@ -88,7 +90,8 @@ int install_user_keyrings(void)
if (IS_ERR(session_keyring)) {
session_keyring =
keyring_alloc(buf, user->uid, (gid_t) -1,
- cred, KEY_ALLOC_IN_QUOTA, NULL);
+ cred, user_keyring_perm,
+ KEY_ALLOC_IN_QUOTA, NULL);
if (IS_ERR(session_keyring)) {
ret = PTR_ERR(session_keyring);
goto error_release;
@@ -129,6 +132,7 @@ int install_thread_keyring_to_cred(struct cred *new)
struct key *keyring;
keyring = keyring_alloc("_tid", new->uid, new->gid, new,
+ KEY_POS_ALL | KEY_USR_VIEW,
KEY_ALLOC_QUOTA_OVERRUN, NULL);
if (IS_ERR(keyring))
return PTR_ERR(keyring);
@@ -173,8 +177,9 @@ int install_process_keyring_to_cred(struct cred *new)
if (new->process_keyring)
return -EEXIST;
- keyring = keyring_alloc("_pid", new->uid, new->gid,
- new, KEY_ALLOC_QUOTA_OVERRUN, NULL);
+ keyring = keyring_alloc("_pid", new->uid, new->gid, new,
+ KEY_POS_ALL | KEY_USR_VIEW,
+ KEY_ALLOC_QUOTA_OVERRUN, NULL);
if (IS_ERR(keyring))
return PTR_ERR(keyring);
@@ -223,8 +228,9 @@ int install_session_keyring_to_cred(struct cred *cred, struct key *keyring)
if (cred->session_keyring)
flags = KEY_ALLOC_IN_QUOTA;
- keyring = keyring_alloc("_ses", cred->uid, cred->gid,
- cred, flags, NULL);
+ keyring = keyring_alloc("_ses", cred->uid, cred->gid, cred,
+ KEY_POS_ALL | KEY_USR_VIEW | KEY_USR_READ,
+ flags, NULL);
if (IS_ERR(keyring))
return PTR_ERR(keyring);
} else {
@@ -773,8 +779,10 @@ long join_session_keyring(const char *name)
keyring = find_keyring_by_name(name, false);
if (PTR_ERR(keyring) == -ENOKEY) {
/* not found - try and create a new one */
- keyring = keyring_alloc(name, old->uid, old->gid, old,
- KEY_ALLOC_IN_QUOTA, NULL);
+ keyring = keyring_alloc(
+ name, old->uid, old->gid, old,
+ KEY_POS_ALL | KEY_USR_VIEW | KEY_USR_READ | KEY_USR_LINK,
+ KEY_ALLOC_IN_QUOTA, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
goto error2;