rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=0324/1/0x4000000000000000 softirq=214592/214597 fqs=0
rcu: 	(t=10500 jiffies g=250777 q=401 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g250777 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=112746
rcu: rcu_preempt kthread starved for 10500 jiffies! g250777 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27688 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1821/0x5740 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7283
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 28120 Comm: syz-executor 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:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d 44 9e 60 0c 48 89 de 5b e9 93 ec 5f 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 28 6e 73 11 65 8b 15 49 6e 73
RSP: 0018:ffffc90000007dd0 EFLAGS: 00000082
RAX: 0000000080010002 RBX: ffff8880206f8348 RCX: 0000000000010000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000ffffffff
RBP: ffff8880206f8300 R08: ffff8880b8628283 R09: 1ffff110170c5050
R10: dffffc0000000000 R11: ffffed10170c5051 R12: ffff8880b8628280
R13: 1ffff110170c507a R14: ffff8880b8628420 R15: ffffffff89b86350
FS:  000055558c5b5500(0000) GS:ffff88812528d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f049eb456b8 CR3: 000000006868e000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline]
 trace_hrtimer_expire_entry include/trace/events/timer.h:261 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1927 [inline]
 __hrtimer_run_queues+0x2cd/0xa20 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:is_zero_pfn include/linux/pgtable.h:1986 [inline]
RIP: 0010:__vm_normal_page mm/memory.c:735 [inline]
RIP: 0010:vm_normal_page+0xdb/0x280 mm/memory.c:754
Code: 8e 48 c1 e8 03 42 80 3c 28 00 74 0c 48 c7 c7 e8 60 26 8e e8 e7 cb 1a 00 4c 8b 3d a8 2d 10 0c 48 89 df 4c 89 fe e8 e5 90 af ff <4c> 39 fb 75 0b e8 7b 8e af ff 90 0f 0b 90 eb 41 48 c7 c0 08 c0 30
RSP: 0018:ffffc9000d7af2c0 EFLAGS: 00000293
RAX: ffffffff8216334b RBX: 00000000000ab138 RCX: ffff88805d139ec0
RDX: 0000000000000000 RSI: 00000000000133d7 RDI: 00000000000ab138
RBP: 000000000023ffff R08: ffff8880200f617f R09: 1ffff1100401ec2f
R10: dffffc0000000000 R11: ffffed100401ec30 R12: 000000fffffffe00
R13: dffffc0000000000 R14: 00080000000ab138 R15: 00000000000133d7
 copy_present_ptes mm/memory.c:1122 [inline]
 copy_pte_range mm/memory.c:1304 [inline]
 copy_pmd_range+0x8c8/0x5970 mm/memory.c:1392
 copy_pud_range mm/memory.c:1429 [inline]
 copy_p4d_range mm/memory.c:1453 [inline]
 copy_page_range+0xbe8/0x11f0 mm/memory.c:1539
 dup_mmap+0xf40/0x1d90 mm/mmap.c:1840
 dup_mm kernel/fork.c:1534 [inline]
 copy_mm+0x13b/0x4a0 kernel/fork.c:1586
 copy_process+0x1f1c/0x4440 kernel/fork.c:2264
 kernel_clone+0x284/0x8f0 kernel/fork.c:2721
 __do_sys_clone kernel/fork.c:2862 [inline]
 __se_sys_clone kernel/fork.c:2846 [inline]
 __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2846
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f049ddc5852
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff5e3d8420 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff5e3d8420 RCX: 00007f049ddc5852
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff5e3d85ac R08: 0000000000000000 R09: 0000000000000001
R10: 000055558c5b57d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000194c06 R15: 00007fff5e3d8600
 </TASK>
CPU: 1 UID: 0 PID: 423 Comm: syz.7.7385 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:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xfd4/0x13d0 kernel/smp.c:892
Code: 89 ee 83 e6 01 31 ff e8 da 07 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 85 03 0c 00 eb 37 f3 90 43 0f b6 04 2c <84> c0 75 10 41 f7 06 01 00 00 00 74 1e e8 6a 03 0c 00 eb e5 44 89
RSP: 0018:ffffc9000e507ae0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b873c148 RCX: 0000000000080000
RDX: ffffc900119a6000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000e507c10 R08: ffffffff9030b5f7 R09: 1ffffffff20616be
R10: dffffc0000000000 R11: ffffffff81746300 R12: 1ffff110170c8589
R13: dffffc0000000000 R14: ffff8880b8642c48 R15: 0000000000000000
FS:  00007f2321e076c0(0000) GS:ffff88812538d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33420ff8 CR3: 0000000084bbb000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 clock_was_set+0x70a/0x7d0 kernel/time/hrtimer.c:999
 do_settimeofday64+0x340/0x570 kernel/time/timekeeping.c:1603
 __do_sys_clock_settime kernel/time/posix-timers.c:1124 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1108 [inline]
 __x64_sys_clock_settime+0x253/0x2a0 kernel/time/posix-timers.c:1108
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2320f9cdd9
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:00007f2321e07028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f2321215fa0 RCX: 00007f2320f9cdd9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f2321032d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2321216038 R14: 00007f2321215fa0 R15: 00007fff1551a918
 </TASK>