Ankur Arora fcabb69674 rcu: handle unstable rdp in rcu_read_unlock_strict() ...

[ Upstream commit fcf0e25ad4 ]

rcu_read_unlock_strict() can be called with preemption enabled
which can make for an unstable rdp and a racy norm value.

Fix this by dropping the preempt-count in __rcu_read_unlock()
after the call to rcu_read_unlock_strict(), adjusting the
preempt-count check appropriately.

Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-05-29 11:03:02 +02:00

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Kconfig

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Kconfig.debug

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Makefile

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rcu_segcblist.c

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rcu_segcblist.h

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rcu.h

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rcuscale.c

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rcutorture.c

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refscale.c

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srcutiny.c

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srcutree.c

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sync.c

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tasks.h

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tiny.c

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tree_exp.h

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tree_nocb.h

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tree_plugin.h

rcu: handle unstable rdp in rcu_read_unlock_strict()

2025-05-29 11:03:02 +02:00

tree_stall.h

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tree.c

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tree.h

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update.c

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