| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 267/593] lockdep: Fix wait-type for empty stack | Date | Mon, 12 Jul 2021 08:07:07 +0200 |
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From: Peter Zijlstra <peterz@infradead.org>
[ Upstream commit f8b298cc39f0619544c607eaef09fd0b2afd10f3 ]
Even the very first lock can violate the wait-context check, consider the various IRQ contexts.
Fixes: de8f5e4f2dc1 ("lockdep: Introduce wait-type checks") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Joerg Roedel <jroedel@suse.de> Link: https://lore.kernel.org/r/20210617190313.256987481@infradead.org Signed-off-by: Sasha Levin <sashal@kernel.org> --- kernel/locking/lockdep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 788629c06ce9..8ae9d7abebc0 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -4626,7 +4626,7 @@ static int check_wait_context(struct task_struct *curr, struct held_lock *next) short curr_inner; int depth; - if (!curr->lockdep_depth || !next_inner || next->trylock) + if (!next_inner || next->trylock) return 0; if (!next_outer) -- 2.30.2
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