rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10499 ticks this GP) idle=12f/1/0x4000000000000000 softirq=55765/55766 fqs=8
(t=10502 jiffies g=92245 q=71)
rcu: rcu_preempt kthread starved for 10484 jiffies! g92245 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+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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 28398 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
RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline]
RIP: 0010:mark_lock+0xf7/0x17b0 kernel/locking/lockdep.c:4571
Code: 66 81 e2 ff 1f 44 0f b7 f2 be 08 00 00 00 4c 89 f0 48 c1 f8 06 48 8d 3c c5 e0 59 d0 8f e8 61 00 62 00 4c 0f a3 35 89 7a 75 0e <0f> 83 03 01 00 00 4b 8d 04 76 48 c1 e0 06 48 05 00 5e d0 8f 48 8d
RSP: 0018:ffffc90000007870 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 1ffff92000000f15 RCX: ffffffff815adf4f
RDX: fffffbfff1fa0b3e RSI: 0000000000000008 RDI: ffffffff8fd059e8
RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff8fd059ef
R10: fffffbfff1fa0b3d R11: 0000000000000000 R12: 0000000000000009
R13: ffff88808cd3eb00 R14: 0000000000000042 R15: ffff88808cd3eb20
FS: 00007f2e4b8e8700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000008c898000 CR4: 00000000003526f0
DR0: 3f00000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4514 [inline]
__lock_acquire+0x8a7/0x54a0 kernel/locking/lockdep.c:4969
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline]
ktime_get+0x7c/0x470 kernel/time/timekeeping.c:827
hrtimer_forward_now include/linux/hrtimer.h:506 [inline]
perf_swevent_hrtimer+0x246/0x3f0 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:xas_find+0x2/0x7d0 lib/xarray.c:1233
Code: 2b 04 25 28 00 00 00 75 0e 48 81 c4 a0 00 00 00 5b 5d 41 5c 41 5d c3 e8 6c f9 3d 05 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 <41> 56 49 89 f6 41 55 41 54 55 53 48 89 fb 48 83 ec 30 e8 67 a7 7d
RSP: 0018:ffffc9000b1aefb0 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90010515000
RDX: 0000000000040000 RSI: 0000000000000002 RDI: ffffc9000b1af060
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff819b13a2 R11: 0000000000000000 R12: ffff88807bb24358
R13: 0000000000000000 R14: ffffc9000b1af060 R15: 0000000000000002
first_map_page mm/filemap.c:3273 [inline]
filemap_map_pages+0x1ee/0x1880 mm/filemap.c:3299
do_fault_around mm/memory.c:4152 [inline]
do_read_fault mm/memory.c:4167 [inline]
do_fault mm/memory.c:4301 [inline]
handle_pte_fault mm/memory.c:4559 [inline]
__handle_mm_fault+0x28dd/0x5320 mm/memory.c:4694
handle_mm_fault+0x1c8/0x790 mm/memory.c:4792
faultin_page mm/gup.c:937 [inline]
__get_user_pages+0x503/0xf80 mm/gup.c:1158
__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+0x3d8/0xbc0 arch/x86/kvm/mmu/mmu.c:3957
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:6038 [inline]
vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6055
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: 0033:0x7f2e4e372a39
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:00007f2e4b8e8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2e4e475f60 RCX: 00007f2e4e372a39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f2e4e3cce8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe97eed50f R14: 00007f2e4b8e8300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 28384 Comm: syz-executor.4 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+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:rwsem_clear_reader_owned kernel/locking/rwsem.c:207 [inline]
RIP: 0010:__up_read+0x149/0x720 kernel/locking/rwsem.c:1295
Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 f6 04 00 00 48 8b 45 08 65 4c 8b 3c 25 40 f0 01 00 48 89 44 24 38 4c 8b 74 24 38 4c 89 f0 <48> 83 e0 fc 4c 39 f8 75 35 4c 89 e7 be 08 00 00 00 41 83 e6 03 e8
RSP: 0018:ffffc900093ef348 EFLAGS: 00000246
RAX: ffff88808ba9a141 RBX: ffffffff8d6e8368 RCX: ffffffff815a2b14
RDX: 1ffff1100f828f28 RSI: 0000000000000008 RDI: ffff88807c147940
RBP: ffff88807c147938 R08: 0000000000000000 R09: ffff88807c147947
R10: ffffed100f828f28 R11: 0000000000000000 R12: ffff88807c147940
R13: 1ffff9200127de6c R14: ffff88808ba9a141 R15: ffff88808ba9a140
mmap_read_unlock include/linux/mmap_lock.h:144 [inline]
get_user_pages_unlocked+0x49d/0x760 mm/gup.c:2070
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:6038 [inline]
vmx_handle_exit+0x4be/0x1950 arch/x86/kvm/vmx/vmx.c:6055
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: 0033:0x7f95845c3a39
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:00007f9581b39188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f95846c6f60 RCX: 00007f95845c3a39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f958461de8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6b7de94f R14: 00007f9581b39300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: 66 81 e2 ff 1f and $0x1fff,%dx
5: 44 0f b7 f2 movzwl %dx,%r14d
9: be 08 00 00 00 mov $0x8,%esi
e: 4c 89 f0 mov %r14,%rax
11: 48 c1 f8 06 sar $0x6,%rax
15: 48 8d 3c c5 e0 59 d0 lea -0x702fa620(,%rax,8),%rdi
1c: 8f
1d: e8 61 00 62 00 callq 0x620083
22: 4c 0f a3 35 89 7a 75 bt %r14,0xe757a89(%rip) # 0xe757ab3
29: 0e
* 2a: 0f 83 03 01 00 00 jae 0x133 <-- trapping instruction
30: 4b 8d 04 76 lea (%r14,%r14,2),%rax
34: 48 c1 e0 06 shl $0x6,%rax
38: 48 05 00 5e d0 8f add $0xffffffff8fd05e00,%rax
3e: 48 rex.W
3f: 8d .byte 0x8d