binder: 10914:10916 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 10914:10916 Release 1 refcount change on invalid ref 0 ret -22 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=9d6/1/0x4000000000000002 softirq=16506/16507 fqs=19 rcu: (t=10501 jiffies g=19857 q=161) rcu: rcu_preempt kthread starved for 10464 jiffies! g19857 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt I22696 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1934 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2090 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 10900 Comm: syz-executor1 Not tainted 4.20.0-rc1+ #332 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+0x244/0x39d lib/dump_stack.c:113 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x16f/0x1bc kernel/rcu/tree.c:1195 print_cpu_stall.cold.67+0x1f3/0x3c7 kernel/rcu/tree.c:1334 check_cpu_stall kernel/rcu/tree.c:1408 [inline] rcu_pending kernel/rcu/tree.c:2961 [inline] rcu_check_callbacks+0xf3b/0x13f0 kernel/rcu/tree.c:2506 update_process_times+0x2d/0x70 kernel/time/timer.c:1636 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:rep_nop arch/x86/include/asm/processor.h:660 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:665 [inline] RIP: 0010:__read_seqcount_begin include/linux/seqlock.h:115 [inline] RIP: 0010:raw_read_seqcount_begin include/linux/seqlock.h:148 [inline] RIP: 0010:read_seqcount_begin include/linux/seqlock.h:165 [inline] RIP: 0010:xfrm_state_find+0x20af/0x3eb0 net/xfrm/xfrm_state.c:949 Code: 60 3f c5 88 c6 05 41 8e 4d 03 01 e8 af 36 9e fa e9 4a e4 ff ff e8 b1 b3 bb fa 0f 0b e8 aa b3 bb fa 0f 0b e8 a3 b3 bb fa f3 90 <48> c7 c0 20 7a 16 8a c6 03 04 8b 00 41 89 c4 41 89 87 c0 fd ff ff RSP: 0018:ffff88817cf1e5d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: ffffed102f9e3cfa RCX: ffffc90007ddd000 RDX: 0000000000040000 RSI: ffffffff86c3d43d RDI: 0000000000000005 RBP: ffff88817cf1ea38 R08: ffff8881d44aa440 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8881d44aa440 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88817cf1ea10 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1413 [inline] xfrm_tmpl_resolve+0x3c0/0xe50 net/xfrm/xfrm_policy.c:1458 xfrm_resolve_and_create_bundle+0x184/0x2800 net/xfrm/xfrm_policy.c:1753 xfrm_lookup_with_ifid+0x39e/0x2b80 net/xfrm/xfrm_policy.c:2076 xfrm_lookup net/xfrm/xfrm_policy.c:2200 [inline] xfrm_lookup_route+0x3c/0x1f0 net/xfrm/xfrm_policy.c:2211 ip6_dst_lookup_flow+0x1c6/0x270 net/ipv6/ip6_output.c:1083 inet6_csk_route_socket+0x8bd/0x1020 net/ipv6/inet6_connection_sock.c:110 inet6_csk_xmit+0x118/0x630 net/ipv6/inet6_connection_sock.c:125 l2tp_xmit_core net/l2tp/l2tp_core.c:1030 [inline] l2tp_xmit_skb+0x134c/0x1670 net/l2tp/l2tp_core.c:1132 pppol2tp_sendmsg+0x4b1/0x6c0 net/l2tp/l2tp_ppp.c:329 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x51d/0x930 net/socket.c:2116 __sys_sendmmsg+0x246/0x6d0 net/socket.c:2211 __do_sys_sendmmsg net/socket.c:2240 [inline] __se_sys_sendmmsg net/socket.c:2237 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2237 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc0bc7b1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457569 RDX: 0800000000000059 RSI: 0000000020005fc0 RDI: 0000000000000008 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc0bc7b26d4 R13: 00000000004c37d5 R14: 00000000004d5970 R15: 00000000ffffffff