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| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2012-01-17 20:39:51 +0000 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2012-01-18 10:41:29 +1100 |
| commit | ee0b31a25a010116f44fca6c96f4516d417793dd (patch) | |
| tree | d7670d202d0f4888b5213ed73d88c9a80bd05b74 | |
| parent | efde8b6e16f11e7d1681c68d86c7fd51053cada7 (diff) | |
| download | lwn-ee0b31a25a010116f44fca6c96f4516d417793dd.tar.gz lwn-ee0b31a25a010116f44fca6c96f4516d417793dd.zip | |
keys: fix trusted/encrypted keys sparse rcu_assign_pointer messages
Define rcu_assign_keypointer(), which uses the key payload.rcudata instead
of payload.data, to resolve the CONFIG_SPARSE_RCU_POINTER message:
"incompatible types in comparison expression (different address spaces)"
Replace the rcu_assign_pointer() calls in encrypted/trusted keys with
rcu_assign_keypointer().
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
| -rw-r--r-- | include/linux/key.h | 3 | ||||
| -rw-r--r-- | security/keys/encrypted-keys/encrypted.c | 4 | ||||
| -rw-r--r-- | security/keys/encrypted-keys/masterkey_trusted.c | 2 | ||||
| -rw-r--r-- | security/keys/trusted.c | 4 |
4 files changed, 9 insertions, 4 deletions
diff --git a/include/linux/key.h b/include/linux/key.h index 183a6af7715d..bfc014c57351 100644 --- a/include/linux/key.h +++ b/include/linux/key.h @@ -293,6 +293,9 @@ static inline bool key_is_instantiated(const struct key *key) (rcu_dereference_protected((KEY)->payload.rcudata, \ rwsem_is_locked(&((struct key *)(KEY))->sem))) +#define rcu_assign_keypointer(KEY, PAYLOAD) \ + (rcu_assign_pointer((KEY)->payload.rcudata, PAYLOAD)) + #ifdef CONFIG_SYSCTL extern ctl_table key_sysctls[]; #endif diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c index 41144f71d615..d91efb6901e9 100644 --- a/security/keys/encrypted-keys/encrypted.c +++ b/security/keys/encrypted-keys/encrypted.c @@ -810,7 +810,7 @@ static int encrypted_instantiate(struct key *key, const void *data, goto out; } - rcu_assign_pointer(key->payload.data, epayload); + rcu_assign_keypointer(key, epayload); out: kfree(datablob); return ret; @@ -874,7 +874,7 @@ static int encrypted_update(struct key *key, const void *data, size_t datalen) memcpy(new_epayload->payload_data, epayload->payload_data, epayload->payload_datalen); - rcu_assign_pointer(key->payload.data, new_epayload); + rcu_assign_keypointer(key, new_epayload); call_rcu(&epayload->rcu, encrypted_rcu_free); out: kfree(buf); diff --git a/security/keys/encrypted-keys/masterkey_trusted.c b/security/keys/encrypted-keys/masterkey_trusted.c index df87272e3f51..8c16c3e472e7 100644 --- a/security/keys/encrypted-keys/masterkey_trusted.c +++ b/security/keys/encrypted-keys/masterkey_trusted.c @@ -18,6 +18,8 @@ #include <linux/module.h> #include <linux/err.h> #include <keys/trusted-type.h> +#include <keys/encrypted-type.h> +#include "encrypted.h" /* * request_trusted_key - request the trusted key diff --git a/security/keys/trusted.c b/security/keys/trusted.c index 0ed5fdf238a2..2d5d041f2049 100644 --- a/security/keys/trusted.c +++ b/security/keys/trusted.c @@ -993,7 +993,7 @@ out: kfree(datablob); kfree(options); if (!ret) - rcu_assign_pointer(key->payload.data, payload); + rcu_assign_keypointer(key, payload); else kfree(payload); return ret; @@ -1067,7 +1067,7 @@ static int trusted_update(struct key *key, const void *data, size_t datalen) goto out; } } - rcu_assign_pointer(key->payload.data, new_p); + rcu_assign_keypointer(key, new_p); call_rcu(&p->rcu, trusted_rcu_free); out: kfree(datablob); |