rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (10499 ticks this GP) idle=c77/1/0x4000000000000000 softirq=98657/98657 fqs=10
(t=10500 jiffies g=191213 q=36)
rcu: rcu_preempt kthread starved for 10478 jiffies! g191213 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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+0xb44/0x5960 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 17977 Comm: syz-executor.3 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:perf_swevent_hrtimer+0x1a4/0x3f0 kernel/events/core.c:10565
Code: 00 00 00 00 48 89 44 24 58 48 c7 44 24 70 21 00 08 05 48 c7 44 24 68 00 00 00 00 e8 f6 78 a2 07 31 ff 65 4c 8b 2d f4 7f 6e 7e <4c> 89 ee e8 34 c1 e1 ff 4d 85 ed 0f 85 ef 00 00 00 41 be 01 00 00
RSP: 0018:ffffc90000fd8c40 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff920001fb18c RCX: ffffffff8193806a
RDX: 1ffff11004b1104f RSI: 0000000000010000 RDI: 0000000000000000
RBP: ffffc90000fd8e30 R08: 0000000000000001 R09: ffff88802588826f
R10: ffffed1004b1104d R11: 0000000000000001 R12: ffff8880258881e8
R13: ffffc90008327a58 R14: ffff888025888080 R15: ffffffff819466a0
FS: 00007fda814c6700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000077306000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__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:__vmcs_readl arch/x86/kvm/vmx/vmx_ops.h:74 [inline]
RIP: 0010:vmcs_readl arch/x86/kvm/vmx/vmx_ops.h:139 [inline]
RIP: 0010:vmx_get_exit_qual arch/x86/kvm/vmx/vmx.h:468 [inline]
RIP: 0010:handle_ept_violation+0x44d/0x6e0 arch/x86/kvm/vmx/vmx.c:5278
Code: 57 00 be 08 00 00 00 4c 89 e7 e8 ee d6 9d 00 48 0f ba ad 60 02 00 00 17 0f 1f 44 00 00 e8 cb 02 57 00 bb 00 64 00 00 0f 78 db <3e> 77 0a 6a 00 53 e8 38 e9 01 00 5b 5b 49 89 dd 31 ff 89 5c 24 04
RSP: 0018:ffffc90008327b00 EFLAGS: 00000202
RAX: 0000000000040000 RBX: 0000000000000181 RCX: ffffc9000fd34000
RDX: 0000000000040000 RSI: ffffffff811f20d5 RDI: ffff88801d194a20
RBP: ffff88801d1947c0 R08: 0000000000000001 R09: ffff88801d194a27
R10: ffffed1003a32944 R11: 0000000000000000 R12: ffff88801d194a20
R13: 0000000000000030 R14: 0000000080000306 R15: 0000000000000000
__vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6038 [inline]
vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6055
vcpu_enter_guest+0x2a90/0x4410 arch/x86/kvm/x86.c:9752
vcpu_run arch/x86/kvm/x86.c:9819 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10051
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: 0033:0x7fda83f50ae9
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:00007fda814c6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fda84063f60 RCX: 00007fda83f50ae9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fda83faaf25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf30a4b6f R14: 00007fda814c6300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 17978 Comm: syz-executor.1 Not tainted 5.15.0-rc7-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:trace_kvm_page_fault arch/x86/kvm/trace.h:382 [inline]
RIP: 0010:handle_ept_violation+0x4fe/0x6e0 arch/x86/kvm/vmx/vmx.c:5292
Code: e9 05 fc ff ff e8 32 02 57 00 65 ff 05 8b ce e2 7e 48 c7 c0 80 01 5a 8d 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <0f> 85 b4 01 00 00 48 8b 05 e5 df 3a 0c e8 20 26 42 00 31 ff 41 89
RSP: 0018:ffffc9000b477b00 EFLAGS: 00000246
RAX: 1ffffffff1ab4030 RBX: 0000000000000181 RCX: ffffc90006093000
RDX: dffffc0000000000 RSI: ffffffff811f216e RDI: 0000000000000003
RBP: ffff888035178c00 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff811f1e6d R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000018 R14: 0000000000000001 R15: 0000000000000100
__vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6038 [inline]
vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6055
vcpu_enter_guest+0x2a90/0x4410 arch/x86/kvm/x86.c:9752
vcpu_run arch/x86/kvm/x86.c:9819 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10051
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: 0033:0x7fd96b704ae9
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:00007fd968c7a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd96b817f60 RCX: 00007fd96b704ae9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fd96b75ef25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff2323997f R14: 00007fd968c7a300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 48 89 44 24 58 mov %rax,0x58(%rsp)
9: 48 c7 44 24 70 21 00 movq $0x5080021,0x70(%rsp)
10: 08 05
12: 48 c7 44 24 68 00 00 movq $0x0,0x68(%rsp)
19: 00 00
1b: e8 f6 78 a2 07 callq 0x7a27916
20: 31 ff xor %edi,%edi
22: 65 4c 8b 2d f4 7f 6e mov %gs:0x7e6e7ff4(%rip),%r13 # 0x7e6e801e
29: 7e
* 2a: 4c 89 ee mov %r13,%rsi <-- trapping instruction
2d: e8 34 c1 e1 ff callq 0xffe1c166
32: 4d 85 ed test %r13,%r13
35: 0f 85 ef 00 00 00 jne 0x12a
3b: 41 rex.B
3c: be .byte 0xbe
3d: 01 00 add %eax,(%rax)