rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=028c/1/0x4000000000000000 softirq=18917/18917 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7303/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=21305, q=188 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7287 Comm: syz.4.450 Not tainted 6.11.0-rc2-syzkaller-00027-g6a0e38264012 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__lock_acquire+0xcda/0x2040 kernel/locking/lockdep.c:5048
Code: e8 03 48 89 44 24 60 80 3c 38 00 74 12 48 89 df e8 eb bb 87 00 48 bf 00 00 00 00 00 fc ff df 45 31 e4 48 89 5c 24 08 4c 8b 33 <48> 83 7c 24 28 00 75 30 48 c7 c0 80 69 ce 94 48 c1 e8 03 0f b6 04
RSP: 0018:ffffc90000a18a70 EFLAGS: 00000046
RAX: 1ffff1100554a15a RBX: ffff88802aa50ad0 RCX: ffffffff816fcdcb
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff88802aa50b08 R08: ffffffff934ee80f R09: 1ffffffff269dd01
R10: dffffc0000000000 R11: fffffbfff269dd02 R12: 0000000000000000
R13: ffff88802aa50ad8 R14: ba444cca68f401c0 R15: ffff88802aa50b28
FS: 00007f17665af6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000006b84c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1693 [inline]
__hrtimer_run_queues+0x670/0xd50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:vcpu_enter_guest arch/x86/kvm/x86.c:11170 [inline]
RIP: 0010:vcpu_run+0x68b4/0x88b0 arch/x86/kvm/x86.c:11314
Code: ee 03 48 bb 00 00 00 00 00 fc ff df 41 0f b6 04 1e 84 c0 0f 85 9f 0c 00 00 c6 02 01 e8 45 40 87 00 fb 48 8b 8c 24 28 01 00 00 <48> 89 c8 48 c1 e8 03 80 3c 18 00 74 15 48 8b bc 24 28 01 00 00 e8
RSP: 0018:ffffc900030e7480 EFLAGS: 00000282
RAX: 8cad042512c88000 RBX: dffffc0000000000 RCX: ffff88805d1f1c20
RDX: dffffc0000000000 RSI: ffffffff8bead560 RDI: ffffffff8c3f8b40
RBP: ffffc900030e79b0 R08: ffffffff934ee917 R09: 1ffffffff269dd22
R10: dffffc0000000000 R11: fffffbfff269dd23 R12: ffff88805d1f1018
R13: ffff88805d1f0000 R14: 1ffff1100ba3e16a R15: ffff88805d1f00d8
kvm_arch_vcpu_ioctl_run+0xa73/0x19d0 arch/x86/kvm/x86.c:11540
kvm_vcpu_ioctl+0x91d/0xea0 virt/kvm/kvm_main.c:4484
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f17657779f9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f17665af038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1765905f80 RCX: 00007f17657779f9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000b
RBP: 00007f17657e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1765905f80 R15: 00007ffde568bde8
</TASK>
task:rm state:R running task stack:24992 pid:7303 tgid:7303 ppid:7266 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5763
Code: 2b 00 74 08 4c 89 f7 e8 1a cd 87 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90003c7f600 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200078fecc RCX: 261e34177e159300
RDX: dffffc0000000000 RSI: ffffffff8beae6e0 RDI: ffffffff8c3f8b40
RBP: ffffc90003c7f748 R08: ffffffff934ee807 R09: 1ffffffff269dd00
R10: dffffc0000000000 R11: fffffbfff269dd01 R12: 1ffff9200078fec8
R13: dffffc0000000000 R14: ffffc90003c7f660 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
dput+0x54/0x2b0 fs/dcache.c:845
step_into+0x355/0x1080 fs/namei.c:1892
link_path_walk+0x797/0xea0 fs/namei.c:2401
path_lookupat+0xa9/0x450 fs/namei.c:2565
filename_lookup+0x256/0x610 fs/namei.c:2595
vfs_statx+0x103/0x490 fs/stat.c:312
vfs_fstatat+0x145/0x190 fs/stat.c:341
__do_sys_newfstatat fs/stat.c:505 [inline]
__se_sys_newfstatat fs/stat.c:499 [inline]
__x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f39ef0f78a9
RSP: 002b:00007fff66314cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007f39ef0d3000 RCX: 00007f39ef0f78a9
RDX: 00007fff66314d80 RSI: 00007fff66314ce0 RDI: 00000000ffffff9c
RBP: 00007fff66314e40 R08: 0000000000080000 R09: 00007fff66314ce0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff66314ce0
R13: 0000000000000007 R14: 00007f39ef109a40 R15: 00000000ffffffff
</TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g21305 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=16420
rcu: rcu_preempt kthread starved for 10502 jiffies! g21305 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26576 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>