rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10475 ticks this GP) idle=d8a/1/0x4000000000000004 softirq=337635/337635 fqs=5174 (t=10500 jiffies g=436621 q=1481) NMI backtrace for cpu 0 CPU: 0 PID: 30019 Comm: syz-executor.5 Not tainted 5.3.0-rc8+ #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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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+0x183/0x1cf kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2736 [inline] rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183 update_process_times+0x32/0x80 kernel/time/timer.c:1639 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1106 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1131 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:preempt_count_sub+0x19/0x150 kernel/sched/core.c:3639 Code: e8 7c c1 5d 00 8b 4d d0 e9 87 fe ff ff 0f 1f 40 00 48 c7 c0 80 51 8b 8a 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 89 e5 53 <83> e0 07 48 c1 e9 03 83 c0 03 89 fb 0f b6 14 11 38 d0 7c 08 84 d2 RSP: 0018:ffff8880ae809db8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffffffff8a8b5180 RBX: ffffffff85c68780 RCX: ffffffff8a8b5180 RDX: dffffc0000000000 RSI: ffffffff8177f14e RDI: 0000000000000001 RBP: ffff8880ae809dc0 R08: ffff888043e2c5c0 R09: ffffed1015d04981 R10: ffffed1015d04980 R11: ffff8880ae824c03 R12: ffff8880ae824c00 R13: ffff8880a0e8be88 R14: ffff8880ae824c00 R15: dffffc0000000000 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] _raw_spin_unlock_irq+0x5e/0x90 kernel/locking/spinlock.c:199 expire_timers kernel/time/timer.c:1365 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x685/0x17a0 kernel/time/timer.c:1698 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:95 Code: 89 25 34 4d 19 09 41 bc f4 ff ff ff e8 6d 9f e9 ff 48 c7 05 1e 4d 19 09 00 00 00 00 e9 77 e9 ff ff 90 90 90 90 90 90 90 90 90 <55> 48 89 e5 65 48 8b 04 25 40 fe 01 00 65 8b 15 04 89 8f 7e 81 e2 RSP: 0018:ffff88801f84ef58 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13 RAX: 000000000000001b RBX: 0000000000000000 RCX: ffffffff8739d092 RDX: 0000000000000073 RSI: 0000000000000078 RDI: 0000000000000001 RBP: ffff88801f84f010 R08: ffff888043e2c5c0 R09: ffff888020ba3800 R10: ffffed1004174701 R11: ffff888020ba380f R12: ffff88801f84f090 R13: 0000000000000073 R14: ffff88801f84efe8 R15: ffffffff88272861 vsnprintf+0x17e/0x19a0 lib/vsprintf.c:2455 snprintf+0xbb/0xf0 lib/vsprintf.c:2636 __rtnl_newlink+0x127c/0x16c0 net/core/rtnetlink.c:3162 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3254 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:5223 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598e9 Code: fd b7 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4ce1ac5c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000012 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4ce1ac66d4 R13: 00000000004c77ea R14: 00000000004dd080 R15: 00000000ffffffff