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TOMOYO: Use mutex_lock_interruptible.

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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>
This commit is contained in:
Tetsuo Handa
2010-05-06 00:18:15 +09:00
committed by James Morris
parent 2b9e4688fa
commit 2928238142
6 changed files with 37 additions and 24 deletions
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security/tomoyo/common.h
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@@ -662,7 +662,6 @@ extern struct list_head tomoyo_pattern_list;
extern struct list_head tomoyo_no_rewrite_list;
extern struct list_head tomoyo_policy_manager_list;
extern struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
extern struct mutex tomoyo_name_list_lock;
/* Lock for protecting policy. */
extern struct mutex tomoyo_policy_lock;