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authorJames Morris <jmorris@namei.org>2011-05-24 22:55:24 +1000
committerJames Morris <jmorris@namei.org>2011-05-24 22:55:24 +1000
commit434d42cfd05a7cc452457a81d2029540cba12150 (patch)
tree3a6b9b7f9ff2e1b7409dd66c15242b2a75aa4422 /security
parentd762f4383100c2a87b1a3f2d678cd3b5425655b4 (diff)
parent12a5a2621b1ee14d32beca35304d7c6076a58815 (diff)
downloadlinux-434d42cfd05a7cc452457a81d2029540cba12150.tar.gz
Merge branch 'next' into for-linus
Diffstat (limited to 'security')
-rw-r--r--security/Kconfig1
-rw-r--r--security/commoncap.c13
-rw-r--r--security/keys/internal.h4
-rw-r--r--security/keys/keyctl.c6
-rw-r--r--security/keys/keyring.c37
-rw-r--r--security/keys/proc.c2
-rw-r--r--security/keys/process_keys.c12
-rw-r--r--security/keys/request_key.c3
-rw-r--r--security/keys/request_key_auth.c3
-rw-r--r--security/keys/user_defined.c4
-rw-r--r--security/tomoyo/common.c17
-rw-r--r--security/tomoyo/file.c1
-rw-r--r--security/tomoyo/memory.c1
-rw-r--r--security/tomoyo/mount.c1
-rw-r--r--security/tomoyo/util.c2
15 files changed, 66 insertions, 41 deletions
diff --git a/security/Kconfig b/security/Kconfig
index 95accd442d5..e0f08b52e4a 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -167,6 +167,7 @@ config INTEL_TXT
config LSM_MMAP_MIN_ADDR
int "Low address space for LSM to protect from user allocation"
depends on SECURITY && SECURITY_SELINUX
+ default 32768 if ARM
default 65536
help
This is the portion of low virtual memory which should be protected
diff --git a/security/commoncap.c b/security/commoncap.c
index f20e984ccfb..a93b3b73307 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -529,15 +529,10 @@ skip:
new->suid = new->fsuid = new->euid;
new->sgid = new->fsgid = new->egid;
- /* For init, we want to retain the capabilities set in the initial
- * task. Thus we skip the usual capability rules
- */
- if (!is_global_init(current)) {
- if (effective)
- new->cap_effective = new->cap_permitted;
- else
- cap_clear(new->cap_effective);
- }
+ if (effective)
+ new->cap_effective = new->cap_permitted;
+ else
+ cap_clear(new->cap_effective);
bprm->cap_effective = effective;
/*
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 07a025f8190..f375152a250 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -109,11 +109,13 @@ extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
const struct cred *cred,
struct key_type *type,
const void *description,
- key_match_func_t match);
+ key_match_func_t match,
+ bool no_state_check);
extern key_ref_t search_my_process_keyrings(struct key_type *type,
const void *description,
key_match_func_t match,
+ bool no_state_check,
const struct cred *cred);
extern key_ref_t search_process_keyrings(struct key_type *type,
const void *description,
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 427fddcaeb1..eca51918c95 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -206,8 +206,14 @@ SYSCALL_DEFINE4(request_key, const char __user *, _type,
goto error5;
}
+ /* wait for the key to finish being constructed */
+ ret = wait_for_key_construction(key, 1);
+ if (ret < 0)
+ goto error6;
+
ret = key->serial;
+error6:
key_put(key);
error5:
key_type_put(ktype);
diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index cdd2f3f88c8..a06ffab3856 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -176,13 +176,15 @@ static void keyring_describe(const struct key *keyring, struct seq_file *m)
else
seq_puts(m, "[anon]");
- rcu_read_lock();
- klist = rcu_dereference(keyring->payload.subscriptions);
- if (klist)
- seq_printf(m, ": %u/%u", klist->nkeys, klist->maxkeys);
- else
- seq_puts(m, ": empty");
- rcu_read_unlock();
+ if (key_is_instantiated(keyring)) {
+ rcu_read_lock();
+ klist = rcu_dereference(keyring->payload.subscriptions);
+ if (klist)
+ seq_printf(m, ": %u/%u", klist->nkeys, klist->maxkeys);
+ else
+ seq_puts(m, ": empty");
+ rcu_read_unlock();
+ }
}
/*
@@ -271,6 +273,7 @@ struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
* @type: The type of key to search for.
* @description: Parameter for @match.
* @match: Function to rule on whether or not a key is the one required.
+ * @no_state_check: Don't check if a matching key is bad
*
* Search the supplied keyring tree for a key that matches the criteria given.
* The root keyring and any linked keyrings must grant Search permission to the
@@ -303,7 +306,8 @@ key_ref_t keyring_search_aux(key_ref_t keyring_ref,
const struct cred *cred,
struct key_type *type,
const void *description,
- key_match_func_t match)
+ key_match_func_t match,
+ bool no_state_check)
{
struct {
struct keyring_list *keylist;
@@ -345,6 +349,8 @@ key_ref_t keyring_search_aux(key_ref_t keyring_ref,
kflags = keyring->flags;
if (keyring->type == type && match(keyring, description)) {
key = keyring;
+ if (no_state_check)
+ goto found;
/* check it isn't negative and hasn't expired or been
* revoked */
@@ -384,11 +390,13 @@ descend:
continue;
/* skip revoked keys and expired keys */
- if (kflags & (1 << KEY_FLAG_REVOKED))
- continue;
+ if (!no_state_check) {
+ if (kflags & (1 << KEY_FLAG_REVOKED))
+ continue;
- if (key->expiry && now.tv_sec >= key->expiry)
- continue;
+ if (key->expiry && now.tv_sec >= key->expiry)
+ continue;
+ }
/* keys that don't match */
if (!match(key, description))
@@ -399,6 +407,9 @@ descend:
cred, KEY_SEARCH) < 0)
continue;
+ if (no_state_check)
+ goto found;
+
/* we set a different error code if we pass a negative key */
if (kflags & (1 << KEY_FLAG_NEGATIVE)) {
err = key->type_data.reject_error;
@@ -478,7 +489,7 @@ key_ref_t keyring_search(key_ref_t keyring,
return ERR_PTR(-ENOKEY);
return keyring_search_aux(keyring, current->cred,
- type, description, type->match);
+ type, description, type->match, false);
}
EXPORT_SYMBOL(keyring_search);
diff --git a/security/keys/proc.c b/security/keys/proc.c
index 525cf8a29cd..49bbc97943a 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -199,7 +199,7 @@ static int proc_keys_show(struct seq_file *m, void *v)
if (key->perm & KEY_POS_VIEW) {
skey_ref = search_my_process_keyrings(key->type, key,
lookup_user_key_possessed,
- cred);
+ true, cred);
if (!IS_ERR(skey_ref)) {
key_ref_put(skey_ref);
key_ref = make_key_ref(key, 1);
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 930634e4514..6c0480db888 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -331,6 +331,7 @@ void key_fsgid_changed(struct task_struct *tsk)
key_ref_t search_my_process_keyrings(struct key_type *type,
const void *description,
key_match_func_t match,
+ bool no_state_check,
const struct cred *cred)
{
key_ref_t key_ref, ret, err;
@@ -350,7 +351,7 @@ key_ref_t search_my_process_keyrings(struct key_type *type,
if (cred->thread_keyring) {
key_ref = keyring_search_aux(
make_key_ref(cred->thread_keyring, 1),
- cred, type, description, match);
+ cred, type, description, match, no_state_check);
if (!IS_ERR(key_ref))
goto found;
@@ -371,7 +372,7 @@ key_ref_t search_my_process_keyrings(struct key_type *type,
if (cred->tgcred->process_keyring) {
key_ref = keyring_search_aux(
make_key_ref(cred->tgcred->process_keyring, 1),
- cred, type, description, match);
+ cred, type, description, match, no_state_check);
if (!IS_ERR(key_ref))
goto found;
@@ -395,7 +396,7 @@ key_ref_t search_my_process_keyrings(struct key_type *type,
make_key_ref(rcu_dereference(
cred->tgcred->session_keyring),
1),
- cred, type, description, match);
+ cred, type, description, match, no_state_check);
rcu_read_unlock();
if (!IS_ERR(key_ref))
@@ -417,7 +418,7 @@ key_ref_t search_my_process_keyrings(struct key_type *type,
else if (cred->user->session_keyring) {
key_ref = keyring_search_aux(
make_key_ref(cred->user->session_keyring, 1),
- cred, type, description, match);
+ cred, type, description, match, no_state_check);
if (!IS_ERR(key_ref))
goto found;
@@ -459,7 +460,8 @@ key_ref_t search_process_keyrings(struct key_type *type,
might_sleep();
- key_ref = search_my_process_keyrings(type, description, match, cred);
+ key_ref = search_my_process_keyrings(type, description, match,
+ false, cred);
if (!IS_ERR(key_ref))
goto found;
err = key_ref;
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index df3c0417ee4..b18a7174590 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -530,8 +530,7 @@ struct key *request_key_and_link(struct key_type *type,
dest_keyring, flags);
/* search all the process keyrings for a key */
- key_ref = search_process_keyrings(type, description, type->match,
- cred);
+ key_ref = search_process_keyrings(type, description, type->match, cred);
if (!IS_ERR(key_ref)) {
key = key_ref_to_ptr(key_ref);
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
index 68164031a74..f6337c9082e 100644
--- a/security/keys/request_key_auth.c
+++ b/security/keys/request_key_auth.c
@@ -59,7 +59,8 @@ static void request_key_auth_describe(const struct key *key,
seq_puts(m, "key:");
seq_puts(m, key->description);
- seq_printf(m, " pid:%d ci:%zu", rka->pid, rka->callout_len);
+ if (key_is_instantiated(key))
+ seq_printf(m, " pid:%d ci:%zu", rka->pid, rka->callout_len);
}
/*
diff --git a/security/keys/user_defined.c b/security/keys/user_defined.c
index f66baf44f32..5b366d7af3c 100644
--- a/security/keys/user_defined.c
+++ b/security/keys/user_defined.c
@@ -157,8 +157,8 @@ EXPORT_SYMBOL_GPL(user_destroy);
void user_describe(const struct key *key, struct seq_file *m)
{
seq_puts(m, key->description);
-
- seq_printf(m, ": %u", key->datalen);
+ if (key_is_instantiated(key))
+ seq_printf(m, ": %u", key->datalen);
}
EXPORT_SYMBOL_GPL(user_describe);
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 7556315c197..a0d09e56874 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -108,10 +108,9 @@ static bool tomoyo_flush(struct tomoyo_io_buffer *head)
head->read_user_buf += len;
w += len;
}
- if (*w) {
- head->r.w[0] = w;
+ head->r.w[0] = w;
+ if (*w)
return false;
- }
/* Add '\0' for query. */
if (head->poll) {
if (!head->read_user_buf_avail ||
@@ -459,8 +458,16 @@ static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
if (profile == &tomoyo_default_profile)
return -EINVAL;
if (!strcmp(data, "COMMENT")) {
- const struct tomoyo_path_info *old_comment = profile->comment;
- profile->comment = tomoyo_get_name(cp);
+ static DEFINE_SPINLOCK(lock);
+ const struct tomoyo_path_info *new_comment
+ = tomoyo_get_name(cp);
+ const struct tomoyo_path_info *old_comment;
+ if (!new_comment)
+ return -ENOMEM;
+ spin_lock(&lock);
+ old_comment = profile->comment;
+ profile->comment = new_comment;
+ spin_unlock(&lock);
tomoyo_put_name(old_comment);
return 0;
}
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index cb09f1fce91..d64e8ecb6fb 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -1011,7 +1011,6 @@ int tomoyo_path_perm(const u8 operation, struct path *path)
break;
case TOMOYO_TYPE_RMDIR:
case TOMOYO_TYPE_CHROOT:
- case TOMOYO_TYPE_UMOUNT:
tomoyo_add_slash(&buf);
break;
}
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c
index 297612669c7..42a7b1ba8cb 100644
--- a/security/tomoyo/memory.c
+++ b/security/tomoyo/memory.c
@@ -75,6 +75,7 @@ void *tomoyo_commit_ok(void *data, const unsigned int size)
memset(data, 0, size);
return ptr;
}
+ kfree(ptr);
return NULL;
}
diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c
index 82bf8c2390b..162a864dba2 100644
--- a/security/tomoyo/mount.c
+++ b/security/tomoyo/mount.c
@@ -143,6 +143,7 @@ static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name,
goto out;
}
requested_dev_name = tomoyo_realpath_from_path(&path);
+ path_put(&path);
if (!requested_dev_name) {
error = -ENOENT;
goto out;
diff --git a/security/tomoyo/util.c b/security/tomoyo/util.c
index 9bfc1ee8222..6d5393204d9 100644
--- a/security/tomoyo/util.c
+++ b/security/tomoyo/util.c
@@ -390,7 +390,7 @@ bool tomoyo_correct_domain(const unsigned char *domainname)
if (!cp)
break;
if (*domainname != '/' ||
- !tomoyo_correct_word2(domainname, cp - domainname - 1))
+ !tomoyo_correct_word2(domainname, cp - domainname))
goto out;
domainname = cp + 1;
}