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| author | David Howells <dhowells@redhat.com> | 2012-05-21 12:32:13 +0100 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2012-05-25 20:51:42 +1000 |
| commit | 423b9788023263364ea5de04189f02bd9b6a12db (patch) | |
| tree | fc3ee4814aa8322fb2abb01c50d96568aa51bd9b /security | |
| parent | ff2bb047c4bce9742e94911eeb44b4d6ff4734ab (diff) | |
| download | lwn-423b9788023263364ea5de04189f02bd9b6a12db.tar.gz lwn-423b9788023263364ea5de04189f02bd9b6a12db.zip | |
KEYS: Fix some sparse warnings
Fix some sparse warnings in the keyrings code:
(1) compat_keyctl_instantiate_key_iov() should be static.
(2) There were a couple of places where a pointer was being compared against
integer 0 rather than NULL.
(3) keyctl_instantiate_key_common() should not take a __user-labelled iovec
pointer as the caller must have copied the iovec to kernel space.
(4) __key_link_begin() takes and __key_link_end() releases
keyring_serialise_link_sem under some circumstances and so this should be
declared.
Note that adding __acquires() and __releases() for this doesn't help cure
the warnings messages - something only commenting out both helps.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/keys/compat.c | 4 | ||||
| -rw-r--r-- | security/keys/internal.h | 2 | ||||
| -rw-r--r-- | security/keys/keyctl.c | 2 | ||||
| -rw-r--r-- | security/keys/keyring.c | 2 |
4 files changed, 6 insertions, 4 deletions
diff --git a/security/keys/compat.c b/security/keys/compat.c index fab4f8dda6c6..e35ae1d208a8 100644 --- a/security/keys/compat.c +++ b/security/keys/compat.c @@ -24,7 +24,7 @@ * * If successful, 0 will be returned. */ -long compat_keyctl_instantiate_key_iov( +static long compat_keyctl_instantiate_key_iov( key_serial_t id, const struct compat_iovec __user *_payload_iov, unsigned ioc, @@ -33,7 +33,7 @@ long compat_keyctl_instantiate_key_iov( struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; long ret; - if (_payload_iov == 0 || ioc == 0) + if (!_payload_iov || !ioc) goto no_payload; ret = compat_rw_copy_check_uvector(WRITE, _payload_iov, ioc, diff --git a/security/keys/internal.h b/security/keys/internal.h index f711b094ed41..f173be2ce3ea 100644 --- a/security/keys/internal.h +++ b/security/keys/internal.h @@ -240,7 +240,7 @@ extern long keyctl_instantiate_key_iov(key_serial_t, extern long keyctl_invalidate_key(key_serial_t); extern long keyctl_instantiate_key_common(key_serial_t, - const struct iovec __user *, + const struct iovec *, unsigned, size_t, key_serial_t); /* diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index ddb3e05bc5fc..b61c063888b9 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -1106,7 +1106,7 @@ long keyctl_instantiate_key_iov(key_serial_t id, struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; long ret; - if (_payload_iov == 0 || ioc == 0) + if (!_payload_iov || !ioc) goto no_payload; ret = rw_copy_check_uvector(WRITE, _payload_iov, ioc, diff --git a/security/keys/keyring.c b/security/keys/keyring.c index 7445875f6818..81e7852d281d 100644 --- a/security/keys/keyring.c +++ b/security/keys/keyring.c @@ -751,6 +751,7 @@ static void keyring_unlink_rcu_disposal(struct rcu_head *rcu) int __key_link_begin(struct key *keyring, const struct key_type *type, const char *description, unsigned long *_prealloc) __acquires(&keyring->sem) + __acquires(&keyring_serialise_link_sem) { struct keyring_list *klist, *nklist; unsigned long prealloc; @@ -960,6 +961,7 @@ void __key_link(struct key *keyring, struct key *key, void __key_link_end(struct key *keyring, struct key_type *type, unsigned long prealloc) __releases(&keyring->sem) + __releases(&keyring_serialise_link_sem) { BUG_ON(type == NULL); BUG_ON(type->name == NULL); |