================================ WARNING: inconsistent lock state 4.19.105-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/18521 [HC0[0]:SC1[1]:HE1:SE0] takes: 00000000fb747364 (rxrpc_conn_id_lock){+.?.}, at: spin_lock include/linux/spinlock.h:329 [inline] 00000000fb747364 (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: 6432 hardirqs last enabled at (6432): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (6432): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (6431): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (6431): [] _raw_spin_lock_irqsave+0x6f/0xcd kernel/locking/spinlock.c:152 softirqs last enabled at (2944): [] __do_softirq+0x633/0x921 kernel/softirq.c:318 softirqs last disabled at (6395): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (6395): [] 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 syz-executor.0/18521: #0: 000000004d1c5488 (rcu_callback){....}, at: __rcu_reclaim kernel/rcu/rcu.h:226 [inline] #0: 000000004d1c5488 (rcu_callback){....}, at: rcu_do_batch kernel/rcu/tree.c:2584 [inline] #0: 000000004d1c5488 (rcu_callback){....}, at: invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] #0: 000000004d1c5488 (rcu_callback){....}, at: __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] #0: 000000004d1c5488 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 kernel/rcu/tree.c:2881 stack backtrace: CPU: 1 PID: 18521 Comm: syz-executor.0 Not tainted 4.19.105-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: 0033:0x4113f2 Code: 87 94 00 00 00 45 31 ff 31 db 31 ed 0f 1f 40 00 48 89 df 89 f0 48 31 f7 c1 e8 10 83 f6 3d 31 c6 44 8d 4f 04 41 89 f8 8d 1c f6 <89> d8 c1 e8 04 31 c3 69 c3 2d eb d4 27 89 c3 c1 eb 0f 31 c3 89 f8 RSP: 002b:00007fffab9221b0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000008170 RBX: 000000008cf56112 RCX: 0000001b2f320000 RDX: 0000000025d5e3da RSI: 0000000081709902 RDI: ffffffff5778ce53 RBP: 00000000000004da R08: 000000005778ce53 R09: 000000005778ce57 R10: 00007fffab922350 R11: 0000000000000246 R12: 000000000076bfa8 R13: 0000000080000000 R14: 00007f83f9993008 R15: 000000000000375e netlink: 40 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 'syz-executor.4': attribute type 2 has an invalid length. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 'syz-executor.4': attribute type 2 has an invalid length. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 'syz-executor.4': attribute type 2 has an invalid length. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 'syz-executor.4': attribute type 2 has an invalid length. audit: type=1400 audit(1582309564.581:62): avc: denied { block_suspend } for pid=19138 comm="syz-executor.3" capability=36 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=capability2 permissive=1