diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2010-05-06 00:18:15 +0900 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-05-06 13:19:18 +1000 |
| commit | 292823814261e085cdcef06b6b691e6c2563fbd4 (patch) | |
| tree | 8c1eaebcf8f698ea13ac2a9291b9769abde1905e /security/tomoyo/domain.c | |
| parent | 2b9e4688fad8867b6e918610f396af3ab9246898 (diff) | |
| download | linux-292823814261e085cdcef06b6b691e6c2563fbd4.tar.bz2 | |
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.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c index e1edec4a9b9d..a1723bbcde0e 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; |