IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready INFO: rcu_preempt self-detected stall on CPU 0-...: (1 GPs behind) idle=4a2/140000000000002/0 softirq=38159/38160 fqs=2 (t=10500 jiffies g=10686 c=10685 q=235) rcu_preempt kthread starved for 10496 jiffies! g10686 c10685 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 rcu_preempt R running task 29920 8 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 NMI backtrace for cpu 0 CPU: 0 PID: 17462 Comm: syz-executor.5 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline] rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall kernel/rcu/tree.c:1610 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:112 [inline] RIP: 0010:unwind_next_frame+0x57d/0x17a0 arch/x86/kernel/unwind_orc.c:348 RSP: 0018:ffff8880aea070d0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: 0000000000002822 RBX: ffff8880aea07218 RCX: 000000000000a7fa RDX: 0000000000000007 RSI: 0000000000002823 RDI: ffffffff8956ae54 RBP: 1ffff11015d40e21 R08: 0000000000000000 R09: ffff8880aea07240 R10: ffff8880aea0724d R11: 0000000000058071 R12: ffffffff8128229e R13: ffff8880aea07250 R14: ffff8880aea07260 R15: 0000000000000002 __unwind_start arch/x86/kernel/unwind_orc.c:578 [inline] __unwind_start+0x450/0x800 arch/x86/kernel/unwind_orc.c:508 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x4a/0xd0 arch/x86/kernel/stacktrace.c:43 save_stack+0x32/0xa0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 kmem_cache_alloc+0x127/0x770 mm/slab.c:3552 dst_alloc+0xe6/0x190 net/core/dst.c:107 rt_dst_alloc+0x6b/0x430 net/ipv4/route.c:1586 __mkroute_output net/ipv4/route.c:2284 [inline] ip_route_output_key_hash_rcu+0x739/0x2710 net/ipv4/route.c:2516 ip_route_output_key_hash+0x18c/0x290 net/ipv4/route.c:2342 __ip_route_output_key include/net/route.h:126 [inline] ip_route_output_flow+0x22/0xb0 net/ipv4/route.c:2601 ip_route_output_key include/net/route.h:136 [inline] sctp_v4_get_dst+0x499/0x1210 net/sctp/protocol.c:462 sctp_transport_route+0xa1/0x410 net/sctp/transport.c:305 sctp_packet_config+0x7d2/0x9f0 net/sctp/output.c:106 sctp_outq_flush+0x45e/0x2dd0 net/sctp/outqueue.c:879 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline] sctp_do_sm+0x419/0x4a90 net/sctp/sm_sideeffect.c:1150 sctp_generate_heartbeat_event+0x1da/0x3f0 net/sctp/sm_sideeffect.c:391 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__write_once_size include/linux/compiler.h:210 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4a/0x50 kernel/kcov.c:90 RSP: 0018:ffff8882155f72e8 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff10 RAX: 0000000000040000 RBX: ffff8880a351f345 RCX: ffffc90006f74000 RDX: 0000000000018ef2 RSI: ffffffff863c9420 RDI: ffff8880a351f344 RBP: ffff88804a0c611b R08: ffff88809ff36188 R09: ffffed1009418c22 R10: ffffed1009418c21 R11: ffff88804a0c610e R12: 0000000000000061 R13: 000000000000000c R14: dffffc0000000000 R15: ffffffffffffffff string+0x120/0x1d0 lib/vsprintf.c:598 vsnprintf+0x6dd/0x1350 lib/vsprintf.c:2181 seq_vprintf+0xe1/0x1b0 fs/seq_file.c:400 seq_printf+0xa2/0xc0 fs/seq_file.c:415 c_show+0x25/0x460 crypto/proc.c:45 seq_read+0x4d2/0x1160 fs/seq_file.c:237 proc_reg_read+0xf2/0x160 fs/proc/inode.c:217 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3e3/0x5a0 fs/read_write.c:919 vfs_readv+0xd3/0x130 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x41d/0x870 fs/splice.c:416 do_splice_to+0xfb/0x150 fs/splice.c:880 splice_direct_to_actor+0x20a/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x469/0xaf0 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c889 RSP: 002b:00007ff13cad8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007ff13cad96d4 RCX: 000000000045c889 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 4000000000010046 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008d4 R14: 00000000004cb7c6 R15: 000000000076bf0c