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 detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=226321, q=430) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295098602-4295088099), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.4 R running task 25504 24569 14222 0x80000002 Call Trace: sched_show_task kernel/sched/core.c:5306 [inline] sched_show_task.cold+0x292/0x30b kernel/sched/core.c:5281 print_other_cpu_stall kernel/rcu/tree.c:1301 [inline] check_cpu_stall kernel/rcu/tree.c:1429 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks.cold+0xa10/0xa4a 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_read_unlock+0xd8/0x130 kernel/rcu/tree_plugin.h:439 Code: 83 c0 03 38 d0 7c 04 84 d2 75 57 8b 83 74 03 00 00 85 c0 75 5e 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 0f b6 04 02 <84> c0 74 04 3c 03 7e 37 c7 83 70 03 00 00 00 00 00 00 5b 41 5c 5d RSP: 0018:ffff88820b4aee80 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88803c6de080 RCX: ffffc90013238000 RDX: 1ffff110078dbc7e RSI: ffffffff8197f142 RDI: ffff88803c6de3f4 RBP: ffff88820b4aee90 R08: ffff88803c6de080 R09: ffffed1015d25bd0 R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff88803c6de3f0 R13: ffff88807b6b0780 R14: 0000000000000003 R15: ffff88820b4af004 rcu_read_unlock include/linux/rcupdate.h:660 [inline] list_lru_count_one+0x1d7/0x380 mm/list_lru.c:196 list_lru_shrink_count include/linux/list_lru.h:122 [inline] super_cache_count+0x1a8/0x2e0 fs/super.c:146 do_shrink_slab+0x10e/0xa80 mm/vmscan.c:469 shrink_slab_memcg mm/vmscan.c:616 [inline] shrink_slab+0x36a/0x5e0 mm/vmscan.c:688 shrink_node+0x50f/0x1540 mm/vmscan.c:2747 shrink_zones mm/vmscan.c:2977 [inline] do_try_to_free_pages+0x3cb/0x11e0 mm/vmscan.c:3039 try_to_free_mem_cgroup_pages+0x337/0x960 mm/vmscan.c:3343 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_fault+0x22d/0x760 mm/shmem.c:1988 __do_fault+0x116/0x4e0 mm/memory.c:3019 do_read_fault mm/memory.c:3430 [inline] do_fault mm/memory.c:3556 [inline] handle_pte_fault mm/memory.c:3787 [inline] __handle_mm_fault+0x2cbd/0x3f20 mm/memory.c:3911 handle_mm_fault+0x43f/0xb30 mm/memory.c:3948 faultin_page mm/gup.c:535 [inline] __get_user_pages+0x7b6/0x1a40 mm/gup.c:738 populate_vma_page_range+0x20d/0x2a0 mm/gup.c:1247 __mm_populate+0x204/0x380 mm/gup.c:1295 mm_populate include/linux/mm.h:2388 [inline] vm_mmap_pgoff+0x213/0x230 mm/util.c:355 ksys_mmap_pgoff+0xf7/0x630 mm/mmap.c:1609 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 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:00007f94ab367c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457e29 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 000000000073c040 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 00007f94ab3686d4 R13: 00000000004c3b88 R14: 00000000004d6ca0 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10555 jiffies! g226321 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28928 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