linux-kernel - [PATCH RFC v5 05/21] dept: Apply Dept to mutex families

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1647397593-16747-6-git-send-email-byungchul.park@lge.com>
Date:   Wed, 16 Mar 2022 11:26:17 +0900
From:   Byungchul Park <byungchul.park@....com>
To:     torvalds@...ux-foundation.org
Cc:     damien.lemoal@...nsource.wdc.com, linux-ide@...r.kernel.org,
        adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        mingo@...hat.com, linux-kernel@...r.kernel.org,
        peterz@...radead.org, will@...nel.org, tglx@...utronix.de,
        rostedt@...dmis.org, joel@...lfernandes.org, sashal@...nel.org,
        daniel.vetter@...ll.ch, chris@...is-wilson.co.uk,
        duyuyang@...il.com, johannes.berg@...el.com, tj@...nel.org,
        tytso@....edu, willy@...radead.org, david@...morbit.com,
        amir73il@...il.com, bfields@...ldses.org,
        gregkh@...uxfoundation.org, kernel-team@....com,
        linux-mm@...ck.org, akpm@...ux-foundation.org, mhocko@...nel.org,
        minchan@...nel.org, hannes@...xchg.org, vdavydov.dev@...il.com,
        sj@...nel.org, jglisse@...hat.com, dennis@...nel.org, cl@...ux.com,
        penberg@...nel.org, rientjes@...gle.com, vbabka@...e.cz,
        ngupta@...are.org, linux-block@...r.kernel.org,
        paolo.valente@...aro.org, josef@...icpanda.com,
        linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
        jack@...e.cz, jack@...e.com, jlayton@...nel.org,
        dan.j.williams@...el.com, hch@...radead.org, djwong@...nel.org,
        dri-devel@...ts.freedesktop.org, airlied@...ux.ie,
        rodrigosiqueiramelo@...il.com, melissa.srw@...il.com,
        hamohammed.sa@...il.com
Subject: [PATCH RFC v5 05/21] dept: Apply Dept to mutex families

Makes Dept able to track dependencies by mutex families.

Signed-off-by: Byungchul Park <byungchul.park@....com>
---
 include/linux/lockdep.h | 18 +++++++++++++++---
 include/linux/mutex.h   | 32 ++++++++++++++++++++++++++++++++
 include/linux/rtmutex.h |  7 +++++++
 3 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 01e7427..42237fc 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -614,9 +614,21 @@ static inline void print_irqtrace_events(struct task_struct *curr)
 #define seqcount_acquire_read(l, s, t, i)	lock_acquire_shared_recursive(l, s, t, NULL, i)
 #define seqcount_release(l, i)			lock_release(l, i)
 
-#define mutex_acquire(l, s, t, i)		lock_acquire_exclusive(l, s, t, NULL, i)
-#define mutex_acquire_nest(l, s, t, n, i)	lock_acquire_exclusive(l, s, t, n, i)
-#define mutex_release(l, i)			lock_release(l, i)
+#define mutex_acquire(l, s, t, i)					\
+do {									\
+	lock_acquire_exclusive(l, s, t, NULL, i);			\
+	dept_mutex_lock(&(l)->dmap, s, t, NULL, "mutex_unlock", i);	\
+} while (0)
+#define mutex_acquire_nest(l, s, t, n, i)				\
+do {									\
+	lock_acquire_exclusive(l, s, t, n, i);				\
+	dept_mutex_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "mutex_unlock", i);\
+} while (0)
+#define mutex_release(l, i)						\
+do {									\
+	lock_release(l, i);						\
+	dept_mutex_unlock(&(l)->dmap, i);				\
+} while (0)
 
 #define rwsem_acquire(l, s, t, i)		lock_acquire_exclusive(l, s, t, NULL, i)
 #define rwsem_acquire_nest(l, s, t, n, i)	lock_acquire_exclusive(l, s, t, n, i)
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 8f226d4..c321911 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -20,11 +20,18 @@
 #include <linux/osq_lock.h>
 #include <linux/debug_locks.h>
 
+#ifdef CONFIG_DEPT
+# define DMAP_MUTEX_INIT(lockname)	.dmap = { .name = #lockname },
+#else
+# define DMAP_MUTEX_INIT(lockname)
+#endif
+
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # define __DEP_MAP_MUTEX_INITIALIZER(lockname)			\
 		, .dep_map = {					\
 			.name = #lockname,			\
 			.wait_type_inner = LD_WAIT_SLEEP,	\
+			DMAP_MUTEX_INIT(lockname)		\
 		}
 #else
 # define __DEP_MAP_MUTEX_INITIALIZER(lockname)
@@ -75,6 +82,31 @@ struct mutex {
 #endif
 };
 
+#ifdef CONFIG_DEPT
+#define dept_mutex_lock(m, ne, t, n, e_fn, ip)				\
+do {									\
+	if (t) {							\
+		dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne);	\
+		dept_ask_event(m);					\
+	} else if (n) {							\
+		dept_ecxt_enter_nokeep(m);				\
+		dept_ask_event(m);					\
+	} else {							\
+		dept_wait(m, 1UL, ip, __func__, ne);			\
+		dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne);	\
+		dept_ask_event(m);					\
+	}								\
+} while (0)
+#define dept_mutex_unlock(m, ip)					\
+do {									\
+	dept_event(m, 1UL, ip, __func__);				\
+	dept_ecxt_exit(m, 1UL, ip);					\
+} while (0)
+#else
+#define dept_mutex_lock(m, ne, t, n, e_fn, ip)	do { } while (0)
+#define dept_mutex_unlock(m, ip)		do { } while (0)
+#endif
+
 #ifdef CONFIG_DEBUG_MUTEXES
 
 #define __DEBUG_MUTEX_INITIALIZER(lockname)				\
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
index 7d04988..60cebb0 100644
--- a/include/linux/rtmutex.h
+++ b/include/linux/rtmutex.h
@@ -76,11 +76,18 @@ static inline void rt_mutex_debug_task_free(struct task_struct *tsk) { }
 	__rt_mutex_init(mutex, __func__, &__key); \
 } while (0)
 
+#ifdef CONFIG_DEPT
+#define DMAP_RT_MUTEX_INIT(mutexname)	.dmap = { .name = #mutexname },
+#else
+#define DMAP_RT_MUTEX_INIT(mutexname)
+#endif
+
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 #define __DEP_MAP_RT_MUTEX_INITIALIZER(mutexname)	\
 	.dep_map = {					\
 		.name = #mutexname,			\
 		.wait_type_inner = LD_WAIT_SLEEP,	\
+		DMAP_RT_MUTEX_INIT(mutexname)		\
 	}
 #else
 #define __DEP_MAP_RT_MUTEX_INITIALIZER(mutexname)
-- 
1.9.1