Killed process 5216 (syz-executor5) total-vm:72580kB, anon-rss:2200kB, file-rss:35784kB, shmem-rss:0kB 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=281861, q=59) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295130315-4295119812), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor5 R running task 25504 29611 7974 0x00000002 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:lock_acquire+0x1ea/0x3f0 kernel/locking/lockdep.c:3844 Code: 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 c7 01 00 00 48 83 3d 12 30 3b 07 00 0f 84 3b 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b RSP: 0018:ffff888047d9ef20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff112503e RBX: ffff8880505fc280 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff8880505fcb28 RDI: 0000000000000282 RBP: ffff888047d9ef68 R08: 0000000000000001 R09: ffff8880505fcb48 R10: ffff8880505fcb28 R11: 0000000000000001 R12: ffffffff88a18320 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 down_read_trylock kernel/locking/rwsem.c:56 [inline] down_read_trylock+0x5d/0xa0 kernel/locking/rwsem.c:51 shrink_slab_memcg mm/vmscan.c:603 [inline] shrink_slab+0x195/0x5e0 mm/vmscan.c:698 shrink_node+0x50f/0x1540 mm/vmscan.c:2757 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_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: 0033:0x457e39 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:00007fbb75102c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457e39 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 000000000073bf00 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 00007fbb751036d4 R13: 00000000004c3b36 R14: 00000000004d6b90 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10554 jiffies! g281861 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28720 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