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| author | Qian Cai <cai@gmx.us> | 2018-11-30 14:09:48 -0800 |
|---|---|---|
| committer | Shohei Sakamoto <sakamotos@casio.co.jp> | 2019-01-25 10:35:54 +0900 |
| commit | 4dffdb53d1cefdded90c29b10f41d456971e4043 (patch) | |
| tree | 3171d7be6a09cf0d2b844335e6108378b23c0e0f | |
| parent | bd624ed3ae308fcf86e37c1e0e295cc413fe9048 (diff) | |
| download | exynos-4dffdb53d1cefdded90c29b10f41d456971e4043.tar.gz | |
debugobjects: avoid recursive calls with kmemleak
[ Upstream commit 8de456cf87ba863e028c4dd01bae44255ce3d835 ]
CONFIG_DEBUG_OBJECTS_RCU_HEAD does not play well with kmemleak due to
recursive calls.
fill_pool
kmemleak_ignore
make_black_object
put_object
__call_rcu (kernel/rcu/tree.c)
debug_rcu_head_queue
debug_object_activate
debug_object_init
fill_pool
kmemleak_ignore
make_black_object
...
So add SLAB_NOLEAKTRACE to kmem_cache_create() to not register newly
allocated debug objects at all.
Link: http://lkml.kernel.org/r/20181126165343.2339-1-cai@gmx.us
Signed-off-by: Qian Cai <cai@gmx.us>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | lib/debugobjects.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/debugobjects.c b/lib/debugobjects.c index a26328ec39f1..bb37541cd441 100644 --- a/lib/debugobjects.c +++ b/lib/debugobjects.c @@ -1088,7 +1088,8 @@ void __init debug_objects_mem_init(void) obj_cache = kmem_cache_create("debug_objects_cache", sizeof (struct debug_obj), 0, - SLAB_DEBUG_OBJECTS, NULL); + SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE, + NULL); if (!obj_cache || debug_objects_replace_static_objects()) { debug_objects_enabled = 0; |