rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10504 ticks this GP) idle=63b/1/0x4000000000000000 softirq=113427/113429 fqs=8
(t=10501 jiffies g=205749 q=209)
rcu: rcu_preempt kthread starved for 10484 jiffies! g205749 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28696 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4953 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6234
schedule+0xd2/0x260 kernel/sched/core.c:6307
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1966
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2139
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12836 Comm: syz-executor.1 Not tainted 5.15.0-rc4-next-20211011-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x77/0x80 kernel/kcov.c:275
Code: f0 72 27 41 0f b6 fb 41 0f b6 c9 48 83 c2 01 48 c7 44 30 e0 01 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 <5b> c3 0f 1f 80 00 00 00 00 53 41 89 fb 41 89 f1 bf 03 00 00 00 65
RSP: 0018:ffffc90000007be0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888018da5338 RCX: ffff888019ef1d00
RDX: 0000000000000000 RSI: ffff888019ef1d00 RDI: 0000000000000003
RBP: 0000000000002710 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8165ca28 R11: 0000000000000000 R12: 0000000000003c72
R13: 0000015a7f5b02d9 R14: 0000000000000000 R15: ffff8880b9c2a440
FS: 00007f596ad61700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000023e42000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hrtimer_forward+0x98/0x270 kernel/time/hrtimer.c:1047
hrtimer_forward_now include/linux/hrtimer.h:506 [inline]
perf_swevent_hrtimer+0x254/0x3f0 kernel/events/core.c:10572
__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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode+0x2c/0x40 kernel/kcov.c:177
Code: 05 99 02 8c 7e 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 ac 15 00 00 85 d2 74 0b 8b 86 88 15 00 00 <39> f8 0f 94 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0
RSP: 0018:ffffc90003aefb28 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffff888073d60000 RCX: ffff888019ef1d00
RDX: 0000000000000000 RSI: ffff888019ef1d00 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81212007 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
write_comp_data kernel/kcov.c:221 [inline]
__sanitizer_cov_trace_const_cmp1+0x22/0x80 kernel/kcov.c:273
vmx_handle_exit+0x507/0x1950 arch/x86/kvm/vmx/vmx.c:6085
vcpu_enter_guest+0x2abc/0x4440 arch/x86/kvm/x86.c:9720
vcpu_run arch/x86/kvm/x86.c:9787 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10019
kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3787
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f596d80b8d9
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:00007f596ad61188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f596d910020 RCX: 00007f596d80b8d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f596d865cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffca1cd5d1f R14: 00007f596ad61300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 12821 Comm: syz-executor.5 Not tainted 5.15.0-rc4-next-20211011-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:604 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
rcu_pending kernel/rcu/tree.c:3889 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2608
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:1428
__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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5605
Code: c6 a6 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000399f6a0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000733ed6 RCX: 68ae702d8c7a5add
RDX: 1ffff1100367cc2c RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff3f947
R10: fffffbfff1fe7f28 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bb814a0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
kvm_tdp_mmu_walk_lockless_begin arch/x86/kvm/mmu/tdp_mmu.h:77 [inline]
walk_shadow_page_lockless_begin+0x16e/0x270 arch/x86/kvm/mmu/mmu.c:698
fast_page_fault arch/x86/kvm/mmu/mmu.c:3143 [inline]
direct_page_fault+0x5d8/0x25f0 arch/x86/kvm/mmu/mmu.c:3901
kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:201 [inline]
kvm_mmu_page_fault+0x27f/0x1940 arch/x86/kvm/mmu/mmu.c:5196
handle_ept_violation+0x29c/0x6e0 arch/x86/kvm/vmx/vmx.c:5352
__vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6061 [inline]
vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6078
vcpu_enter_guest+0x2abc/0x4440 arch/x86/kvm/x86.c:9720
vcpu_run arch/x86/kvm/x86.c:9787 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10019
kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3787
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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: 0033:0x7f8ade1508d9
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:00007f8adb6c7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8ade254f60 RCX: 00007f8ade1508d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f8ade1aacb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1202f93f R14: 00007f8adb6c7300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: f0 72 27 lock jb 0x2a
3: 41 0f b6 fb movzbl %r11b,%edi
7: 41 0f b6 c9 movzbl %r9b,%ecx
b: 48 83 c2 01 add $0x1,%rdx
f: 48 c7 44 30 e0 01 00 movq $0x1,-0x20(%rax,%rsi,1)
16: 00 00
18: 48 89 7c 30 e8 mov %rdi,-0x18(%rax,%rsi,1)
1d: 48 89 4c 30 f0 mov %rcx,-0x10(%rax,%rsi,1)
22: 4c 89 54 d8 20 mov %r10,0x20(%rax,%rbx,8)
27: 48 89 10 mov %rdx,(%rax)
* 2a: 5b pop %rbx <-- trapping instruction
2b: c3 retq
2c: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
33: 53 push %rbx
34: 41 89 fb mov %edi,%r11d
37: 41 89 f1 mov %esi,%r9d
3a: bf 03 00 00 00 mov $0x3,%edi
3f: 65 gs