A potential coding issue was: Reported-by: Zheng Yejian <zhengyejian@xxxxxxxxxxx> This set should solve it. Peter Zijlstra (1): futex: Change locking rules Thomas Gleixner (2): futex: Ensure the correct return value from futex_lock_pi() futex: Cure exit race kernel/futex.c | 233 +++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 189 insertions(+), 44 deletions(-) Cc: bigeasy@xxxxxxxxxxxxx Cc: bristot@xxxxxxxxxx Cc: Darren Hart <dvhart@xxxxxxxxxxxxx> Cc: dvhart@xxxxxxxxxxxxx Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: jdesfossez@xxxxxxxxxxxx Cc: juri.lelli@xxxxxxx Cc: mathieu.desnoyers@xxxxxxxxxxxx Cc: rostedt@xxxxxxxxxxx Cc: Sasha Levin <sashal@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Cc: xlpang@xxxxxxxxxx -- 2.25.1