protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=a2e/1/0x4000000000000002 softirq=148516/148517 fqs=34 rcu: (t=10500 jiffies g=245749 q=1038) rcu: rcu_preempt kthread starved for 5257 jiffies! g245749 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29024 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 schedule_timeout+0x4db/0xfd0 kernel/time/timer.c:1803 rcu_gp_fqs_loop kernel/rcu/tree.c:1948 [inline] rcu_gp_kthread+0x956/0x17a0 kernel/rcu/tree.c:2105 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 30694 Comm: syz-executor2 Not tainted 5.0.0-rc5+ #62 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+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 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.c:1211 print_cpu_stall kernel/rcu/tree.c:1348 [inline] check_cpu_stall kernel/rcu/tree.c:1422 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks.cold+0x500/0xa4a kernel/rcu/tree.c:2521 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:rcu_dynticks_curr_cpu_in_eqs+0x84/0xb0 kernel/rcu/tree.c:306 Code: 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 17 8b 83 b8 00 00 00 48 83 c4 08 <5b> 41 5c 5d d1 e8 83 f0 01 83 e0 01 c3 4c 89 e7 e8 d7 c2 48 00 eb RSP: 0018:ffff88806307f1d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 00000000002d1a2e RBX: ffff8880ae82ddc0 RCX: ffffffff815e1364 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880ae82de78 RBP: ffff88806307f1e8 R08: 1ffff11015d05bcf R09: ffffed1015d05bd0 R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff8880ae82de78 R13: ffff88806307f3e8 R14: ffff88806307f601 R15: 0000000000000000 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:932 rcu_read_lock_sched include/linux/rcupdate.h:716 [inline] percpu_ref_put_many+0xf9/0x190 include/linux/percpu-refcount.h:280 percpu_ref_put include/linux/percpu-refcount.h:301 [inline] css_put include/linux/cgroup.h:389 [inline] mem_cgroup_iter+0x901/0xad0 mm/memcontrol.c:1003 shrink_node+0x3c7/0x1540 mm/vmscan.c:2781 shrink_zones mm/vmscan.c:2987 [inline] do_try_to_free_pages+0x3cb/0x11e0 mm/vmscan.c:3049 try_to_free_mem_cgroup_pages+0x337/0x960 mm/vmscan.c:3353 try_charge+0x3d7/0x1570 mm/memcontrol.c:2234 mem_cgroup_try_charge+0x24d/0x5e0 mm/memcontrol.c:5913 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:5928 shmem_getpage_gfp+0x69b/0x3520 mm/shmem.c:1790 shmem_getpage mm/shmem.c:134 [inline] shmem_write_begin+0x105/0x1e0 mm/shmem.c:2385 generic_perform_write+0x231/0x530 mm/filemap.c:3208 __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3333 generic_file_write_iter+0x360/0x610 mm/filemap.c:3361 call_write_iter include/linux/fs.h:1863 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x613/0x8e0 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0xea/0x1f0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f654fa25c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39 RDX: 00000000ffffff76 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f654fa266d4 R13: 00000000004c737b R14: 00000000004dcea0 R15: 00000000ffffffff