rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10499 ticks this GP) idle=113/1/0x4000000000000000 softirq=173212/173212 fqs=4301 (t=10500 jiffies g=236081 q=39559) NMI backtrace for cpu 1 CPU: 1 PID: 19028 Comm: syz-executor.3 Not tainted 5.15.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3880 [inline] rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599 update_process_times+0x16d/0x200 kernel/time/timer.c:1785 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194 Code: 74 24 10 e8 1a 01 23 f8 48 89 ef e8 62 77 23 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 b3 62 16 f8 65 8b 05 2c b2 c8 76 85 c0 74 0a 5b 5d c3 e8 c0 d8 RSP: 0018:ffffc90000dc0cc0 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1faa692 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000001 RBP: ffff88801fa038b8 R08: 0000000000000001 R09: ffffffff8fcffabf R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801fa038b8 R14: ffffffff873c9de0 R15: 0000000000000000 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:3206 garp_queue_xmit net/802/garp.c:271 [inline] garp_join_timer+0xc6/0xf0 net/802/garp.c:423 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:finish_task_switch.isra.0+0x323/0xb80 kernel/sched/core.c:4814 Code: e3 06 e6 07 85 c0 75 02 0f 0b 48 85 db 0f 85 25 01 00 00 4c 89 f7 e8 fc f7 ff ff e8 17 cd 2c 00 fb 65 48 8b 1c 25 40 f0 01 00 <48> 8d bb 40 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc9001909f3b0 EFLAGS: 00000206 RAX: 0000000000000111 RBX: ffff888155961c80 RCX: 1ffffffff1fa272a RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9001909f3f8 R08: 0000000000000001 R09: ffffffff8fcffa17 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b9d32798 R13: ffff888072040000 R14: ffff8880b9d31a40 R15: ffff8880b9d32478 context_switch kernel/sched/core.c:4943 [inline] __schedule+0xb4c/0x5960 kernel/sched/core.c:6287 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6459 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:403 [inline] zap_pte_range mm/memory.c:1422 [inline] zap_pmd_range mm/memory.c:1481 [inline] zap_pud_range mm/memory.c:1510 [inline] zap_p4d_range mm/memory.c:1531 [inline] unmap_page_range+0x1044/0x2a10 mm/memory.c:1552 unmap_single_vma+0x198/0x310 mm/memory.c:1597 zap_page_range_single+0x2ca/0x430 mm/memory.c:1680 unmap_mapping_range_vma mm/memory.c:3320 [inline] unmap_mapping_range_tree mm/memory.c:3341 [inline] unmap_mapping_page+0x49d/0x590 mm/memory.c:3374 truncate_cleanup_page+0x255/0x560 mm/truncate.c:173 truncate_inode_pages_range+0x26c/0x1010 mm/truncate.c:325 truncate_bdev_range+0xb2/0x270 block/bdev.c:115 blkdev_fallocate+0x274/0x480 block/fops.c:588 vfs_fallocate+0x48d/0xe10 fs/open.c:307 madvise_remove mm/madvise.c:925 [inline] madvise_vma mm/madvise.c:987 [inline] do_madvise.part.0+0xb60/0x2250 mm/madvise.c:1202 do_madvise mm/madvise.c:1228 [inline] __do_sys_madvise mm/madvise.c:1228 [inline] __se_sys_madvise mm/madvise.c:1226 [inline] __x64_sys_madvise+0x113/0x150 mm/madvise.c:1226 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fbd3e13aa39 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbd3b68f188 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fbd3e23e020 RCX: 00007fbd3e13aa39 RDX: 0000000000000009 RSI: 0000000000600003 RDI: 0000000020000000 RBP: 00007fbd3e194e8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbd3e771b2f R14: 00007fbd3b68f300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 74 24 je 0x26 2: 10 e8 adc %ch,%al 4: 1a 01 sbb (%rcx),%al 6: 23 f8 and %eax,%edi 8: 48 89 ef mov %rbp,%rdi b: e8 62 77 23 f8 callq 0xf8237772 10: 81 e3 00 02 00 00 and $0x200,%ebx 16: 75 25 jne 0x3d 18: 9c pushfq 19: 58 pop %rax 1a: f6 c4 02 test $0x2,%ah 1d: 75 2d jne 0x4c 1f: 48 85 db test %rbx,%rbx 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 b3 62 16 f8 callq 0xf81662e2 <-- trapping instruction 2f: 65 8b 05 2c b2 c8 76 mov %gs:0x76c8b22c(%rip),%eax # 0x76c8b262 36: 85 c0 test %eax,%eax 38: 74 0a je 0x44 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: c3 retq 3d: e8 .byte 0xe8 3e: c0 .byte 0xc0 3f: d8 .byte 0xd8