diff options
| -rw-r--r-- | include/linux/key.h | 3 | ||||
| -rw-r--r-- | security/keys/key.c | 18 | ||||
| -rw-r--r-- | security/keys/keyctl.c | 3 |
3 files changed, 15 insertions, 9 deletions
diff --git a/include/linux/key.h b/include/linux/key.h index 163f864b6bd..8b0bd3393ab 100644 --- a/include/linux/key.h +++ b/include/linux/key.h @@ -67,6 +67,8 @@ struct key; #define KEY_OTH_SETATTR 0x00000020 #define KEY_OTH_ALL 0x0000003f +#define KEY_PERM_UNDEF 0xffffffff + struct seq_file; struct user_struct; struct signal_struct; @@ -232,6 +234,7 @@ extern key_ref_t key_create_or_update(key_ref_t keyring, const char *description, const void *payload, size_t plen, + key_perm_t perm, unsigned long flags); extern int key_update(key_ref_t key, diff --git a/security/keys/key.c b/security/keys/key.c index 654d23baf35..d98c61953be 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -757,11 +757,11 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref, const char *description, const void *payload, size_t plen, + key_perm_t perm, unsigned long flags) { struct key_type *ktype; struct key *keyring, *key = NULL; - key_perm_t perm; key_ref_t key_ref; int ret; @@ -806,15 +806,17 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref, goto found_matching_key; } - /* decide on the permissions we want */ - perm = KEY_POS_VIEW | KEY_POS_SEARCH | KEY_POS_LINK | KEY_POS_SETATTR; - perm |= KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_LINK | KEY_USR_SETATTR; + /* if the client doesn't provide, decide on the permissions we want */ + if (perm == KEY_PERM_UNDEF) { + perm = KEY_POS_VIEW | KEY_POS_SEARCH | KEY_POS_LINK | KEY_POS_SETATTR; + perm |= KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_LINK | KEY_USR_SETATTR; - if (ktype->read) - perm |= KEY_POS_READ | KEY_USR_READ; + if (ktype->read) + perm |= KEY_POS_READ | KEY_USR_READ; - if (ktype == &key_type_keyring || ktype->update) - perm |= KEY_USR_WRITE; + if (ktype == &key_type_keyring || ktype->update) + perm |= KEY_USR_WRITE; + } /* allocate a new key */ key = key_alloc(ktype, description, current->fsuid, current->fsgid, diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index 56e963b700b..993be634a5e 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -112,7 +112,8 @@ asmlinkage long sys_add_key(const char __user *_type, /* create or update the requested key and add it to the target * keyring */ key_ref = key_create_or_update(keyring_ref, type, description, - payload, plen, KEY_ALLOC_IN_QUOTA); + payload, plen, KEY_PERM_UNDEF, + KEY_ALLOC_IN_QUOTA); if (!IS_ERR(key_ref)) { ret = key_ref_to_ptr(key_ref)->serial; key_ref_put(key_ref); |