The pi_mutex->wait_lock is irq safe and needs to enable local interrupts upon unlocking, matching it's corresponding raw_spin_lock_irq().
Fixes: c74aef2d06a9f (futex: Fix pi_state->owner serialization) Signed-off-by: Davidlohr Bueso <dbu...@suse.de> --- kernel/futex.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/futex.c b/kernel/futex.c index 475055715371..ded7af2ba87f 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -885,7 +885,7 @@ static void exit_pi_state_list(struct task_struct *curr) */ if (head->next != next) { /* retain curr->pi_lock for the loop invariant */ - raw_spin_unlock(&pi_state->pi_mutex.wait_lock); + raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock); spin_unlock(&hb->lock); put_pi_state(pi_state); continue; -- 2.26.2