rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10499 ticks this GP) idle=d4f/1/0x4000000000000000 softirq=15552/15556 fqs=14
(t=10500 jiffies g=22769 q=375)
rcu: rcu_preempt kthread starved for 10464 jiffies! g22769 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:28952 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x800 kernel/rcu/tree.c:1957
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2130
kthread+0x3e5/0x4d0 kernel/kthread.c:319
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: 10052 Comm: syz-executor.4 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:214 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:344 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:895 [inline]
RIP: 0010:trace_hrtimer_expire_entry include/trace/events/timer.h:232 [inline]
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1682 [inline]
RIP: 0010:__hrtimer_run_queues+0x571/0xe50 kernel/time/hrtimer.c:1749
Code: 00 e8 13 55 10 00 45 89 e4 be 08 00 00 00 4c 89 e0 48 c1 f8 06 48 8d 3c c5 50 26 6e 8d e8 97 27 57 00 4c 0f a3 25 3f 46 09 0c <41> 0f 92 c4 31 ff 44 89 e6 e8 91 5c 10 00 45 84 e4 0f 85 f1 03 00
RSP: 0018:ffffc90000007e40 EFLAGS: 00000047
RAX: 0000000000000001 RBX: ffff8880292ed948 RCX: ffffffff8164e009
RDX: fffffbfff1adc4cb RSI: 0000000000000008 RDI: ffffffff8d6e2650
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8d6e2657
R10: fffffbfff1adc4ca R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b9c22440 R14: ffff8880b9c223c0 R15: ffffffff81937420
FS: 00007fc678406700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007370c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:28 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x69/0xc0 kernel/rcu/tree.c:1121
Code: 48 03 1c ed 80 f8 32 8b be 04 00 00 00 48 89 df e8 0c 21 5b 00 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 19 8b 03 83 e0 01
RSP: 0018:ffffc900057d7680 EFLAGS: 00000a02
RAX: dffffc0000000000 RBX: ffff8880b9c32a88 RCX: ffffffff8160e694
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b9c32a88
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880b9c32a8b
R10: ffffed1017386551 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000100000010 R15: 0000000000000002
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5636
rcu_lock_release include/linux/rcupdate.h:272 [inline]
rcu_read_unlock include/linux/rcupdate.h:720 [inline]
kvm_tdp_mmu_walk_lockless_end arch/x86/kvm/mmu/tdp_mmu.h:84 [inline]
walk_shadow_page_lockless_end+0x176/0x270 arch/x86/kvm/mmu/mmu.c:717
fast_page_fault arch/x86/kvm/mmu/mmu.c:3303 [inline]
direct_page_fault+0x5ed/0x2320 arch/x86/kvm/mmu/mmu.c:3981
kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:127 [inline]
kvm_mmu_page_fault+0x17e/0x17f0 arch/x86/kvm/mmu/mmu.c:5287
handle_ept_violation+0x29c/0x6e0 arch/x86/kvm/vmx/vmx.c:5325
__vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6034 [inline]
vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6051
vcpu_enter_guest+0x2a90/0x4410 arch/x86/kvm/x86.c:9735
vcpu_run arch/x86/kvm/x86.c:9802 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10034
kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3779
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: 0033:0x7fc67ae8f8d9
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:00007fc678406188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc67af93f60 RCX: 00007fc67ae8f8d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fc67aee9cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0e03c16f R14: 00007fc678406300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 10020 Comm: syz-executor.2 Not tainted 5.15.0-rc5-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+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 kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:197
Code: fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 f9 ba 8c 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9
RSP: 0018:ffffc900063bf258 EFLAGS: 00000202
RAX: 0000000080000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff88808e3da240 RDI: 0000000000000003
RBP: 0000000020001000 R08: 0000000000000000 R09: 000000001c674701
R10: ffffffff81ad050b R11: 0000000000000001 R12: ffff88801c674780
R13: 0000000000000000 R14: 0000000000000326 R15: 0000000000000000
rwsem_is_locked include/linux/rwsem.h:72 [inline]
mmap_assert_locked include/linux/mmap_lock.h:156 [inline]
find_vma+0x59/0x270 mm/mmap.c:2278
find_extend_vma+0x25/0x150 mm/mmap.c:2593
__get_user_pages+0x1c7/0xf80 mm/gup.c:1110
__get_user_pages_locked mm/gup.c:1343 [inline]
get_user_pages_unlocked+0x1b3/0x760 mm/gup.c:2067
hva_to_pfn_slow arch/x86/kvm/../../../virt/kvm/kvm_main.c:2269 [inline]
hva_to_pfn+0x1c1/0xdd0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2401
__gfn_to_pfn_memslot+0x229/0x420 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2460
kvm_faultin_pfn+0x171/0xbc0 arch/x86/kvm/mmu/mmu.c:3942
direct_page_fault+0xd22/0x2320 arch/x86/kvm/mmu/mmu.c:3992
kvm_mmu_do_page_fault arch/x86/kvm/mmu.h:127 [inline]
kvm_mmu_page_fault+0x17e/0x17f0 arch/x86/kvm/mmu/mmu.c:5287
handle_ept_violation+0x29c/0x6e0 arch/x86/kvm/vmx/vmx.c:5325
__vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6034 [inline]
vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6051
vcpu_enter_guest+0x2a90/0x4410 arch/x86/kvm/x86.c:9735
vcpu_run arch/x86/kvm/x86.c:9802 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10034
kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3779
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: 0033:0x7f4c3eebc8d9
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:00007f4c3c433188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4c3efc0f60 RCX: 00007f4c3eebc8d9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f4c3ef16cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc3627ee6f R14: 00007f4c3c433300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 00 e8 add %ch,%al
2: 13 55 10 adc 0x10(%rbp),%edx
5: 00 45 89 add %al,-0x77(%rbp)
8: e4 be in $0xbe,%al
a: 08 00 or %al,(%rax)
c: 00 00 add %al,(%rax)
e: 4c 89 e0 mov %r12,%rax
11: 48 c1 f8 06 sar $0x6,%rax
15: 48 8d 3c c5 50 26 6e lea -0x7291d9b0(,%rax,8),%rdi
1c: 8d
1d: e8 97 27 57 00 callq 0x5727b9
22: 4c 0f a3 25 3f 46 09 bt %r12,0xc09463f(%rip) # 0xc094669
29: 0c
* 2a: 41 0f 92 c4 setb %r12b <-- trapping instruction
2e: 31 ff xor %edi,%edi
30: 44 89 e6 mov %r12d,%esi
33: e8 91 5c 10 00 callq 0x105cc9
38: 45 84 e4 test %r12b,%r12b
3b: 0f .byte 0xf
3c: 85 f1 test %esi,%ecx
3e: 03 00 add (%rax),%eax