rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7486/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=97817, q=125 ncpus=2)
task:udevd           state:R  running task     stack:24600 pid:7486  tgid:7486  ppid:4977   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x10e9/0x6820 kernel/sched/core.c:7189
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
 irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x5e/0x370 kernel/locking/lockdep.c:5872
Code: 05 fb 2d 26 12 83 f8 07 0f 87 d9 02 00 00 48 0f a3 05 06 29 f3 0e 0f 82 a4 02 00 00 8b 35 8e 5c f3 0e 85 f6 0f 85 bf 00 00 00 <48> 8b 44 24 30 65 48 2b 05 9d 2d 26 12 0f 85 ed 02 00 00 48 83 c4
RSP: 0018:ffffc90004aa7860 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8defa963 RDI: ffffffff8c1c3600
RBP: ffffffff8e7e54e0 R08: 0000000086db7919 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
 unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4569 [inline]
 slab_alloc_node mm/slub.c:4898 [inline]
 kmem_cache_alloc_noprof+0x241/0x6e0 mm/slub.c:4905
 alloc_filename fs/namei.c:142 [inline]
 do_getname+0x35/0x390 fs/namei.c:182
 class_filename_uflags_constructor include/linux/fs.h:2556 [inline]
 do_utimes_path+0xc9/0x1b0 fs/utimes.c:94
 do_utimes+0x34/0x100 fs/utimes.c:139
 __do_sys_utimensat fs/utimes.c:158 [inline]
 __se_sys_utimensat fs/utimes.c:142 [inline]
 __x64_sys_utimensat+0x1c6/0x290 fs/utimes.c:142
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe212032a1a
RSP: 002b:00007ffedf54a328 EFLAGS: 00000246 ORIG_RAX: 0000000000000118
RAX: ffffffffffffffda RBX: 00007ffedf54ad00 RCX: 00007fe212032a1a
RDX: 0000000000000000 RSI: 00007ffedf54ad00 RDI: 00000000ffffff9c
RBP: 00007ffedf54ad11 R08: 0000000000000030 R09: 00005601e4106450
R10: 0000000000000100 R11: 0000000000000246 R12: 00007ffedf54a7e0
R13: 00007ffedf54a3e0 R14: 00005601ca52a6d7 R15: 00005601e4357180
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10497 jiffies! g97817 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=67651
rcu: rcu_preempt kthread starved for 10498 jiffies! g97817 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:27848 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x10e9/0x6820 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15990 Comm: syz.1.2404 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:vmx_do_nmi_irqoff+0x13/0x20 arch/x86/kvm/vmx/vmenter.S:324
Code: ff ff 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 83 e4 f0 6a 18 55 9c 6a 10 e8 5d 6e 76 f5 <c9> c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90004b17978 EFLAGS: 00000082
RAX: 0000000080000200 RBX: ffff888038805380 RCX: 0000000000000000
RDX: 0000000080000202 RSI: 0000000000000000 RDI: ffff888038805380
RBP: ffffc90004b17978 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880388073ae
R13: ffff888038805670 R14: 0000000000000001 R15: 0000000000000000
FS:  00007fcc1b5056c0(0000) GS:ffff888124476000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000006a416000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 vmx_handle_nmi+0xbc/0x100 arch/x86/kvm/vmx/vmx.c:7477
 vmx_vcpu_enter_exit+0x119/0x1e0 arch/x86/kvm/vmx/vmx.c:7514
 vmx_vcpu_run+0x999/0x32f0 arch/x86/kvm/vmx/vmx.c:7614
 vcpu_enter_guest arch/x86/kvm/x86.c:11481 [inline]
 vcpu_run+0x2d61/0x5ca0 arch/x86/kvm/x86.c:11765
 kvm_arch_vcpu_ioctl_run+0x5b6/0x1890 arch/x86/kvm/x86.c:12120
 kvm_vcpu_ioctl+0x730/0x1720 virt/kvm/kvm_main.c:4469
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc1a59cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcc1b505028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcc1a815fa0 RCX: 00007fcc1a59cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 00007fcc1a632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc1a816038 R14: 00007fcc1a815fa0 R15: 00007ffc22374888
 </TASK>