Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 249.934954][ T9637] Set syz2 is full, maxelem 65536 reached [ 354.964238][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 354.971683][ C1] rcu: 1-...!: (10506 ticks this GP) idle=57e/1/0x4000000000000002 softirq=14528/14529 fqs=7 [ 354.985309][ C1] (t=10503 jiffies g=8589 q=15) [ 354.991532][ C1] rcu: rcu_preempt kthread starved for 10489 jiffies! g8589 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 355.002892][ C1] rcu: RCU grace-period kthread stack dump: [ 355.009724][ C1] rcu_preempt I29240 10 2 0x80004000 [ 355.018248][ C1] Call Trace: [ 355.021738][ C1] __schedule+0x934/0x1f90 [ 355.026244][ C1] ? __sched_text_start+0x8/0x8 [ 355.031315][ C1] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 355.037120][ C1] ? schedule_timeout+0x47c/0xc50 [ 355.043390][ C1] ? lockdep_hardirqs_on+0x421/0x5e0 [ 355.048785][ C1] schedule+0xdc/0x2b0 [ 355.053936][ C1] schedule_timeout+0x486/0xc50 [ 355.058785][ C1] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 355.064692][ C1] ? usleep_range+0x170/0x170 [ 355.069424][ C1] ? trace_hardirqs_on+0x67/0x240 [ 355.074558][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 355.080301][ C1] ? swake_up_one+0x60/0x60 [ 355.086273][ C1] rcu_gp_kthread+0xa10/0x1940 [ 355.091212][ C1] ? rcu_note_context_switch+0x1980/0x1980 [ 355.097061][ C1] ? trace_hardirqs_on+0x67/0x240 [ 355.102947][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 355.109514][ C1] ? __kthread_parkme+0x108/0x1c0 [ 355.114577][ C1] ? __kasan_check_read+0x11/0x20 [ 355.119769][ C1] kthread+0x361/0x430 [ 355.124154][ C1] ? rcu_note_context_switch+0x1980/0x1980 [ 355.130034][ C1] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 355.135745][ C1] ret_from_fork+0x24/0x30 [ 355.140206][ C1] NMI backtrace for cpu 1 [ 355.144638][ C1] CPU: 1 PID: 9638 Comm: syz-executor816 Not tainted 5.6.0-rc1-next-20200212-syzkaller #0 [ 355.154889][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 355.165335][ C1] Call Trace: [ 355.168609][ C1] [ 355.171573][ C1] dump_stack+0x197/0x210 [ 355.176940][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 355.182351][ C1] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 355.188511][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 355.194502][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 355.200438][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 355.205547][ C1] rcu_sched_clock_irq.cold+0x51a/0xc3d [ 355.211120][ C1] ? raise_softirq+0x138/0x340 [ 355.215887][ C1] update_process_times+0x2d/0x70 [ 355.220957][ C1] tick_sched_handle+0xa2/0x190 [ 355.225805][ C1] tick_sched_timer+0x53/0x140 [ 355.230553][ C1] __hrtimer_run_queues+0x364/0xe40 [ 355.235736][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 355.241003][ C1] ? hrtimer_init+0x330/0x330 [ 355.245663][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 355.251363][ C1] ? ktime_get_update_offsets_now+0x2ce/0x430 [ 355.257413][ C1] hrtimer_interrupt+0x314/0x770 [ 355.262362][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 355.267904][ C1] apic_timer_interrupt+0xf/0x20 [ 355.272832][ C1] [ 355.275870][ C1] RIP: 0010:hash_ip4_expire.isra.0+0x6b8/0x8d0 [ 355.282068][ C1] Code: 7d c0 48 89 03 e8 b8 4c d2 fa e8 53 61 e5 fa 48 8b 45 80 83 45 94 01 48 c1 e8 03 42 0f b6 04 38 84 c0 74 06 0f 8e 02 01 00 00 <48> 8b 45 98 bb 01 00 00 00 44 8b 75 94 0f b6 48 08 44 89 f7 d3 e3 [ 355.301784][ C1] RSP: 0018:ffffc900024f6e28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 355.310231][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8690699e [ 355.318192][ C1] RDX: 0000000000000000 RSI: ffffffff86906c4d RDI: 0000000000000005 [ 355.326148][ C1] RBP: ffffc900024f6ed8 R08: ffff88808dfa24c0 R09: ffffed1011ef3a73 [ 355.334098][ C1] R10: ffffed1011ef3a72 R11: ffff88808f79d397 R12: ffff88808f79d3d0 [ 355.342067][ C1] R13: ffff8880a6dcb700 R14: 0000000000000003 R15: dffffc0000000000 [ 355.350040][ C1] ? hash_ip4_expire.isra.0+0x3ee/0x8d0 [ 355.355575][ C1] ? hash_ip4_expire.isra.0+0x69d/0x8d0 [ 355.361105][ C1] ? hash_ip4_expire.isra.0+0x69d/0x8d0 [ 355.366814][ C1] ? retint_kernel+0x2b/0x2b [ 355.371397][ C1] hash_ip4_add+0x178/0x1b6c [ 355.375994][ C1] hash_ip4_uadt+0x546/0x7a0 [ 355.380568][ C1] ? hash_ip6_add+0x1d70/0x1d70 [ 355.385419][ C1] ? hash_ip6_uadt+0x670/0x670 [ 355.390191][ C1] ? __kasan_check_write+0x14/0x20 [ 355.395321][ C1] ? __kasan_check_read+0x11/0x20 [ 355.400388][ C1] call_ad+0x1a0/0x5a0 [ 355.404478][ C1] ? start_msg+0x220/0x220 [ 355.408950][ C1] ? nla_memcpy+0xb0/0xb0 [ 355.413341][ C1] ? __nla_parse+0x43/0x60 [ 355.417765][ C1] ip_set_ad.isra.0+0x572/0xb20 [ 355.422622][ C1] ? ip_set_dump_start+0x6f0/0x6f0 [ 355.427808][ C1] ? nla_memcpy+0xb0/0xb0 [ 355.432135][ C1] ? lock_downgrade+0x920/0x920 [ 355.437035][ C1] ip_set_uadd+0x37/0x50 [ 355.441260][ C1] ? ip_set_udel+0x50/0x50 [ 355.445768][ C1] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 355.450757][ C1] ? nfnetlink_bind+0x2c0/0x2c0 [ 355.455592][ C1] ? __kasan_check_read+0x11/0x20 [ 355.460634][ C1] ? mark_lock+0xc2/0x1220 [ 355.465094][ C1] ? netlink_sendmsg+0xa1b/0xea0 [ 355.470083][ C1] ? __kasan_check_read+0x11/0x20 [ 355.475089][ C1] ? mark_lock+0xc2/0x1220 [ 355.479582][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.485882][ C1] ? apparmor_capable+0x4df/0x910 [ 355.490901][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.497145][ C1] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 355.502604][ C1] netlink_rcv_skb+0x177/0x450 [ 355.507404][ C1] ? nfnetlink_bind+0x2c0/0x2c0 [ 355.512257][ C1] ? netlink_ack+0xb50/0xb50 [ 355.516845][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.523142][ C1] ? ns_capable_common+0x93/0x100 [ 355.528193][ C1] ? ns_capable+0x20/0x30 [ 355.532616][ C1] ? __netlink_ns_capable+0x104/0x140 [ 355.538047][ C1] nfnetlink_rcv+0x1ba/0x460 [ 355.542639][ C1] ? nfnetlink_rcv_batch+0x1790/0x1790 [ 355.548084][ C1] ? netlink_deliver_tap+0x248/0xbf0 [ 355.553355][ C1] ? __kasan_check_write+0x14/0x20 [ 355.558478][ C1] netlink_unicast+0x59e/0x7e0 [ 355.563267][ C1] ? netlink_attachskb+0x870/0x870 [ 355.568362][ C1] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 355.574263][ C1] ? __check_object_size+0x3d/0x437 [ 355.579486][ C1] netlink_sendmsg+0x91c/0xea0 [ 355.584504][ C1] ? netlink_unicast+0x7e0/0x7e0 [ 355.589565][ C1] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 355.595100][ C1] ? apparmor_socket_sendmsg+0x2a/0x30 [ 355.600555][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.606822][ C1] ? security_socket_sendmsg+0x8d/0xc0 [ 355.612269][ C1] ? netlink_unicast+0x7e0/0x7e0 [ 355.617226][ C1] sock_sendmsg+0xd7/0x130 [ 355.621625][ C1] ____sys_sendmsg+0x753/0x880 [ 355.626371][ C1] ? kernel_sendmsg+0x50/0x50 [ 355.631036][ C1] ? lockdep_init_map+0x1be/0x6d0 [ 355.636096][ C1] ___sys_sendmsg+0x100/0x170 [ 355.640759][ C1] ? sendmsg_copy_msghdr+0x70/0x70 [ 355.645859][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.652112][ C1] ? __this_cpu_preempt_check+0x35/0x190 [ 355.657735][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.663951][ C1] ? percpu_counter_add_batch+0x13c/0x190 [ 355.669715][ C1] ? __fd_install+0x1bc/0x640 [ 355.674551][ C1] ? find_held_lock+0x35/0x130 [ 355.679299][ C1] ? __fd_install+0x1bc/0x640 [ 355.683973][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.690193][ C1] ? __fget_light+0x1ad/0x270 [ 355.694853][ C1] ? __fdget+0x1b/0x20 [ 355.698915][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 355.705143][ C1] __sys_sendmsg+0x105/0x1d0 [ 355.709738][ C1] ? __sys_sendmsg_sock+0xc0/0xc0 [ 355.714854][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 355.720299][ C1] ? do_syscall_64+0x26/0x790 [ 355.724980][ C1] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 355.731037][ C1] ? do_syscall_64+0x26/0x790 [ 355.735721][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 355.741019][ C1] do_syscall_64+0xfa/0x790 [ 355.745520][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 355.751396][ C1] RIP: 0033:0x441579 [ 355.755285][ C1] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 355.774876][ C1] RSP: 002b:00007fff8402f668 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 355.783284][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441579 [ 355.792275][ C1] RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000004 [ 355.800232][ C1] RBP: 000000000003ccc9 R08: 00000000004002c8 R09: 00000000004002c8 [ 355.808191][ C1] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004023a0 [ 355.816144][ C1] R13: 0000000000402430 R14: 0000000000000000 R15: 0000000000000000