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linux-imx/kernel/rcu
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Catalin Marinas b88cc37a82 rcu: kmemleak: Ignore kmemleak false positives when RCU-freeing objects 
commit 5f98fd034c upstream.

Since the actual slab freeing is deferred when calling kvfree_rcu(), so
is the kmemleak_free() callback informing kmemleak of the object
deletion. From the perspective of the kvfree_rcu() caller, the object is
freed and it may remove any references to it. Since kmemleak does not
scan RCU internal data storing the pointer, it will report such objects
as leaks during the grace period.

Tell kmemleak to ignore such objects on the kvfree_call_rcu() path. Note
that the tiny RCU implementation does not have such issue since the
objects can be tracked from the rcu_ctrlblk structure.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Christoph Paasch <cpaasch@apple.com>
Closes: https://lore.kernel.org/all/F903A825-F05F-4B77-A2B5-7356282FBA2C@apple.com/
Cc: <stable@vger.kernel.org>
Tested-by: Christoph Paasch <cpaasch@apple.com>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-11-28 17:20:02 +00:00
..
Kconfig rcu: Employ jiffies-based backstop to callback time limit 2023-05-11 13:42:39 -07:00
Kconfig.debug
Makefile
rcu_segcblist.c
rcu_segcblist.h
rcu.h Networking changes for 6.6. 2023-08-29 11:33:01 -07:00
rcuscale.c rcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle() 2023-07-14 15:01:49 -07:00
rcutorture.c rcutorture: Stop right-shifting torture_random() return values 2023-08-14 15:01:08 -07:00
refscale.c refscale: Add a "jiffies" test 2023-07-14 15:01:04 -07:00
srcutiny.c
srcutree.c srcu: Only accelerate on enqueue time 2023-11-28 17:19:36 +00:00
sync.c
tasks.h Merge branches 'doc.2023.07.14b', 'fixes.2023.08.16a', 'rcu-tasks.2023.07.24a', 'rcuscale.2023.07.14b', 'refscale.2023.07.14b', 'torture.2023.08.14a' and 'torturescripts.2023.07.20a' into HEAD 2023-08-16 14:31:08 -07:00
tiny.c
tree_exp.h rcu: Mark additional concurrent load from ->cpu_no_qs.b.exp 2023-05-11 13:42:39 -07:00
tree_nocb.h rcu: Make the rcu_nocb_poll boot parameter usable via boot config 2023-08-16 14:27:41 -07:00
tree_plugin.h rcu: Mark additional concurrent load from ->cpu_no_qs.b.exp 2023-05-11 13:42:39 -07:00
tree_stall.h rcu/tree: Defer setting of jiffies during stall reset 2023-11-28 17:20:02 +00:00
tree.c rcu: kmemleak: Ignore kmemleak false positives when RCU-freeing objects 2023-11-28 17:20:02 +00:00
tree.h rcu/tree: Defer setting of jiffies during stall reset 2023-11-28 17:20:02 +00:00
update.c