INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 1, t=10502 jiffies, g=27431, c=27430, q=5) All QSes seen, last rcu_sched kthread activity 10500 (4295056829-4295046329), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.0 R running task 28416 14892 14719 0x8000000c Call Trace: <IRQ> sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline] check_cpu_stall kernel/rcu/tree.c:1616 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0xd3f/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:deref_stack_reg arch/x86/kernel/unwind_orc.c:292 [inline] RIP: 0010:deref_stack_reg+0x9b/0xc0 arch/x86/kernel/unwind_orc.c:286 RSP: 0018:ffff8880aeb076f0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 1ffff11015d60f0a RBX: 1ffff11015d60ede RCX: 1ffff11015d60f03 RDX: ffff88808ded7b10 RSI: ffff8880aeb07710 RDI: ffff88808ded7b08 RBP: ffffffff81352a43 R08: 0000000000000000 R09: ffff88808ded79d8 R10: ffff8880aeb0783d R11: 0000000000058071 R12: ffff8880aeb07850 R13: dffffc0000000000 R14: ffff8880aeb07850 R15: 0000000000000001 unwind_next_frame+0xa06/0x17a0 arch/x86/kernel/unwind_orc.c:425 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44 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_node_trace+0x15a/0x7b0 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x35/0xd0 net/core/skbuff.c:137 __alloc_skb+0xca/0x4c0 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] new_skb+0x24/0x1c0 drivers/block/aoe/aoecmd.c:67 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline] aoecmd_cfg+0x155/0x570 drivers/block/aoe/aoecmd.c:1392 discover_timer drivers/block/aoe/aoemain.c:44 [inline] discover_timer+0xc5/0x160 drivers/block/aoe/aoemain.c:21 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 </IRQ> RIP: 0010:PageAnon include/linux/page-flags.h:407 [inline] RIP: 0010:page_remove_rmap+0x50/0x920 mm/rmap.c:1295 RSP: 0018:ffff88808ded77d8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: ffff8880663706c0 RBX: 0000000000000000 RCX: ffff88808ded7a10 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0002363448 RBP: ffffea0002363440 R08: 0000000000000001 R09: 0000000000000001 R10: ffff888066370f68 R11: ffff8880663706c0 R12: ffffea0002363440 R13: ffffea0002363460 R14: dead000000000100 R15: 0000000000000000 zap_pte_range mm/memory.c:1342 [inline] zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1473 [inline] zap_p4d_range mm/memory.c:1494 [inline] unmap_page_range+0xa60/0x1930 mm/memory.c:1515 unmap_single_vma+0x147/0x2b0 mm/memory.c:1560 unmap_vmas+0x9d/0x160 mm/memory.c:1590 exit_mmap+0x26d/0x4b0 mm/mmap.c:3056 __mmput kernel/fork.c:930 [inline] mmput+0x103/0x420 kernel/fork.c:951 exit_mm kernel/exit.c:545 [inline] do_exit+0x933/0x2b00 kernel/exit.c:845 do_group_exit+0x100/0x310 kernel/exit.c:955 get_signal+0x385/0x1ca0 kernel/signal.c:2418 do_signal+0x7c/0x1690 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x159/0x220 arch/x86/entry/common.c:160 prepare_exit_to_usermode+0x1af/0x210 arch/x86/entry/common.c:199 retint_user+0x8/0x18 RIP: 0033:0x4026b7 RSP: 002b:00007f603a5b1c60 EFLAGS: 00000a83 ORIG_RAX: ffffffffffffff10 RAX: f85d744f5e1c3f8c RBX: 000000000076bf28 RCX: 000000000045f2ba RDX: 00000000015939c1 RSI: 00007f603a5b1c60 RDI: 0000000000000001 RBP: 000000000076bf20 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000076bf2c R13: 0000000000000a37 R14: 00000000004cca0e R15: 000000000076bf2c