================================ WARNING: inconsistent lock state 4.19.104-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. loop0/28043 [HC0[0]:SC1[1]:HE1:SE0] takes: 00000000c41806f2 (rxrpc_conn_id_lock){+.?.}, at: spin_lock include/linux/spinlock.h:329 [inline] 00000000c41806f2 (rxrpc_conn_id_lock){+.?.}, at: rxrpc_put_client_connection_id.part.0+0x19/0x70 net/rxrpc/conn_client.c:143 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] rxrpc_get_client_connection_id net/rxrpc/conn_client.c:114 [inline] rxrpc_alloc_client_connection net/rxrpc/conn_client.c:198 [inline] rxrpc_get_client_conn net/rxrpc/conn_client.c:345 [inline] rxrpc_connect_call+0x948/0x4920 net/rxrpc/conn_client.c:702 rxrpc_new_client_call+0x8e7/0x1880 net/rxrpc/call_object.c:291 rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:596 [inline] rxrpc_do_sendmsg+0xfc3/0x1ca3 net/rxrpc/sendmsg.c:652 rxrpc_sendmsg+0x4a0/0x5b0 net/rxrpc/af_rxrpc.c:593 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2115 __sys_sendmmsg+0x1bf/0x4e0 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2236 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 392 hardirqs last enabled at (392): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (392): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (391): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (391): [] _raw_spin_lock_irqsave+0x6f/0xcd kernel/locking/spinlock.c:152 softirqs last enabled at (134): [] __do_softirq+0x633/0x921 kernel/softirq.c:318 softirqs last disabled at (283): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (283): [] irq_exit+0x180/0x1d0 kernel/softirq.c:412 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(rxrpc_conn_id_lock); lock(rxrpc_conn_id_lock); *** DEADLOCK *** 1 lock held by loop0/28043: #0: 00000000e3d18099 (rcu_callback){....}, at: __rcu_reclaim kernel/rcu/rcu.h:226 [inline] #0: 00000000e3d18099 (rcu_callback){....}, at: rcu_do_batch kernel/rcu/tree.c:2584 [inline] #0: 00000000e3d18099 (rcu_callback){....}, at: invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] #0: 00000000e3d18099 (rcu_callback){....}, at: __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] #0: 00000000e3d18099 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 kernel/rcu/tree.c:2881 stack backtrace: CPU: 1 PID: 28043 Comm: loop0 Not tainted 4.19.104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_usage_bug.cold+0x330/0x42a kernel/locking/lockdep.c:2540 valid_state kernel/locking/lockdep.c:2553 [inline] mark_lock_irq kernel/locking/lockdep.c:2747 [inline] mark_lock+0xd1b/0x1370 kernel/locking/lockdep.c:3127 mark_irqflags kernel/locking/lockdep.c:3005 [inline] __lock_acquire+0xc62/0x49c0 kernel/locking/lockdep.c:3368 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] rxrpc_put_client_connection_id.part.0+0x19/0x70 net/rxrpc/conn_client.c:143 rxrpc_put_client_connection_id include/linux/spinlock.h:370 [inline] rxrpc_put_one_client_conn net/rxrpc/conn_client.c:956 [inline] rxrpc_put_client_conn+0x6c6/0xc20 net/rxrpc/conn_client.c:1002 rxrpc_put_connection net/rxrpc/ar-internal.h:951 [inline] rxrpc_rcu_destroy_call+0xbd/0x200 net/rxrpc/call_object.c:657 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0xba0/0x1a30 kernel/rcu/tree.c:2881 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:192 Code: c0 98 56 f2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 2d c1 9d 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 f2 07 f4 f9 65 8b 05 4b 58 ad 78 85 c0 74 06 41 RSP: 0018:ffff88804f60fcc8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e4ad3 RBX: ffff888094254540 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888094254dbc RBP: ffff88804f60fcd0 R08: ffff888094254540 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae92c280 R13: ffff88807aafe500 R14: ffff88809b5682c0 R15: 0000000000000000 finish_lock_switch kernel/sched/core.c:2576 [inline] finish_task_switch+0x146/0x7c0 kernel/sched/core.c:2676 context_switch kernel/sched/core.c:2829 [inline] __schedule+0x86e/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 kthread_worker_fn+0x54c/0x840 kernel/kthread.c:664 loop_kthread_worker_fn+0x51/0x60 drivers/block/loop.c:900 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 snd_aloop snd_aloop.0: control 0:0:0:syz1:0 is already present snd_aloop snd_aloop.0: control 0:0:0:syz1:0 is already present snd_aloop snd_aloop.0: control 0:0:0:syz1:0 is already present snd_dummy snd_dummy.0: control 0:0:0:syz1:0 is already present snd_dummy snd_dummy.0: control 0:0:0:syz1:0 is already present snd_aloop snd_aloop.0: control 0:0:0:syz1:0 is already present snd_aloop snd_aloop.0: control 0:0:0:syz1:0 is already present snd_aloop snd_aloop.0: control 0:0:0:syz1:0 is already present NOHZ: local_softirq_pending 08