IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 hrtimer: interrupt took 25549 ns ===================================== WARNING: bad unlock balance detected! 4.19.0-rc2-next-20180904+ #55 Not tainted ------------------------------------- kworker/u4:1/22 is trying to release lock (&file->mut) at: [] ucma_event_handler+0x788/0x1000 drivers/infiniband/core/ucma.c:390 but there are no more locks to release! other info that might help us debug this: 4 locks held by kworker/u4:1/22: #0: 00000000cfd75845 ((wq_completion)"ib_addr"){+.+.}, at: __write_once_size include/linux/compiler.h:215 [inline] #0: 00000000cfd75845 ((wq_completion)"ib_addr"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000cfd75845 ((wq_completion)"ib_addr"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000cfd75845 ((wq_completion)"ib_addr"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000cfd75845 ((wq_completion)"ib_addr"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000cfd75845 ((wq_completion)"ib_addr"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000cfd75845 ((wq_completion)"ib_addr"){+.+.}, at: process_one_work+0xb44/0x1aa0 kernel/workqueue.c:2124 #1: 00000000643b7ac2 ((work_completion)(&(&req->work)->work)){+.+.}, at: process_one_work+0xb9b/0x1aa0 kernel/workqueue.c:2128 #2: 000000003614ce59 (&id_priv->handler_mutex){+.+.}, at: addr_handler+0xed/0x430 drivers/infiniband/core/cma.c:2856 #3: 00000000ceceb470 (&file->mut){+.+.}, at: ucma_event_handler+0x116/0x1000 drivers/infiniband/core/ucma.c:350 stack backtrace: CPU: 1 PID: 22 Comm: kworker/u4:1 Not tainted 4.19.0-rc2-next-20180904+ #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ib_addr process_one_req Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_unlock_imbalance_bug.cold.49+0xcc/0xd8 kernel/locking/lockdep.c:3465 __lock_release kernel/locking/lockdep.c:3672 [inline] lock_release+0x76e/0x9f0 kernel/locking/lockdep.c:3920 __mutex_unlock_slowpath+0x102/0x8c0 kernel/locking/mutex.c:1198 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:713 ucma_event_handler+0x788/0x1000 drivers/infiniband/core/ucma.c:390 addr_handler+0x311/0x430 drivers/infiniband/core/cma.c:2880 process_one_req+0x1a6/0x940 drivers/infiniband/core/addr.c:570 process_one_work+0xc73/0x1aa0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415