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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2010-05-06 00:18:15 +0900
committerJames Morris <jmorris@namei.org>2010-05-06 13:19:18 +1000
commit292823814261e085cdcef06b6b691e6c2563fbd4 (patch)
tree8c1eaebcf8f698ea13ac2a9291b9769abde1905e /security/tomoyo/domain.c
parent2b9e4688fad8867b6e918610f396af3ab9246898 (diff)
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TOMOYO: Use mutex_lock_interruptible.
Some of TOMOYO's functions may sleep after mutex_lock(). If OOM-killer selected a process which is waiting at mutex_lock(), the to-be-killed process can't be killed. Thus, replace mutex_lock() with mutex_lock_interruptible() so that the to-be-killed process can immediately return from TOMOYO's functions. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/tomoyo/domain.c')
-rw-r--r--security/tomoyo/domain.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
index e1edec4a9b9..a1723bbcde0 100644
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
@@ -154,7 +154,8 @@ static int tomoyo_update_domain_initializer_entry(const char *domainname,
goto out;
if (!is_delete)
entry = kmalloc(sizeof(*entry), GFP_NOFS);
- mutex_lock(&tomoyo_policy_lock);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
list_for_each_entry_rcu(ptr, &tomoyo_domain_initializer_list, list) {
if (ptr->is_not != is_not ||
ptr->domainname != saved_domainname ||
@@ -374,7 +375,8 @@ static int tomoyo_update_domain_keeper_entry(const char *domainname,
goto out;
if (!is_delete)
entry = kmalloc(sizeof(*entry), GFP_NOFS);
- mutex_lock(&tomoyo_policy_lock);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
list_for_each_entry_rcu(ptr, &tomoyo_domain_keeper_list, list) {
if (ptr->is_not != is_not ||
ptr->domainname != saved_domainname ||
@@ -566,7 +568,8 @@ static int tomoyo_update_alias_entry(const char *original_name,
goto out;
if (!is_delete)
entry = kmalloc(sizeof(*entry), GFP_NOFS);
- mutex_lock(&tomoyo_policy_lock);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
list_for_each_entry_rcu(ptr, &tomoyo_alias_list, list) {
if (ptr->original_name != saved_original_name ||
ptr->aliased_name != saved_aliased_name)
@@ -656,7 +659,7 @@ struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
const u8 profile)
{
struct tomoyo_domain_info *entry;
- struct tomoyo_domain_info *domain;
+ struct tomoyo_domain_info *domain = NULL;
const struct tomoyo_path_info *saved_domainname;
bool found = false;
@@ -666,7 +669,8 @@ struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
if (!saved_domainname)
return NULL;
entry = kzalloc(sizeof(*entry), GFP_NOFS);
- mutex_lock(&tomoyo_policy_lock);
+ if (mutex_lock_interruptible(&tomoyo_policy_lock))
+ goto out;
list_for_each_entry_rcu(domain, &tomoyo_domain_list, list) {
if (domain->is_deleted ||
tomoyo_pathcmp(saved_domainname, domain->domainname))
@@ -685,6 +689,7 @@ struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
found = true;
}
mutex_unlock(&tomoyo_policy_lock);
+ out:
tomoyo_put_name(saved_domainname);
kfree(entry);
return found ? domain : NULL;