rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=f8c4/1/0x4000000000000000 softirq=32044/32045 fqs=0
rcu: 	(detected by 1, t=10506 jiffies, g=36057, q=313 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10878 Comm: syz.2.1762 Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:task_irq_context kernel/locking/lockdep.c:4683 [inline]
RIP: 0010:__lock_acquire+0x27d/0xd80 kernel/locking/lockdep.c:5172
Code: ff ff 41 23 54 cd 20 09 c2 41 89 54 cd 20 48 8b 94 24 80 00 00 00 49 89 54 cd 08 4d 89 7c cd 10 48 8b 54 24 78 49 89 54 cd 18 <65> 8b 15 b8 7d c8 11 31 f6 85 d2 40 0f 95 c6 31 d2 83 bd d4 0a 00
RSP: 0018:ffffc90000007b80 EFLAGS: 00000002
RAX: 0000000000000070 RBX: 0000000000000000 RCX: 0000000000000005
RDX: 0000000000000000 RSI: 0000000000000070 RDI: 0000000000000001
RBP: ffff888025f61e00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888025f628f0 R14: 0000000000000000 R15: ffff8880b86276d8
FS:  00007fd1867766c0(0000) GS:ffff888124fac000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003c80 CR3: 000000007e2ce000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
 __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:1795 [inline]
 __hrtimer_run_queues+0x67b/0xd40 kernel/time/hrtimer.c:1855
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd9/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 2b 00 74 08 4c 89 f7 e8 8d ad fb f5 f6 44 24 21 02 75 55 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> c2 a8 5f f5 65 8b 05 8b 56 36 07 85 c0 74 46 48 c7 04 24 0e 36
RSP: 0018:ffffc9001d6d7ba0 EFLAGS: 00000206
RAX: 785bdf1862ef9b00 RBX: 1ffff92003adaf78 RCX: 0000000000000007
RDX: 0000000000000007 RSI: ffffffff8e693ba6 RDI: 0000000000000001
RBP: ffffc9001d6d7c30 R08: ffffffff905f7677 R09: 1ffffffff20beece
R10: dffffc0000000000 R11: fffffbfff20beecf R12: 1ffff92003adaf74
R13: dffffc0000000000 R14: ffffc9001d6d7bc0 R15: 0000000000000246
 clock_was_set+0x690/0x820 kernel/time/hrtimer.c:974
 do_settimeofday64+0x39e/0x650 kernel/time/timekeeping.c:1395
 __do_sys_clock_settime kernel/time/posix-timers.c:1140 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1124 [inline]
 __x64_sys_clock_settime+0x242/0x280 kernel/time/posix-timers.c:1124
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd18598d169
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:00007fd186776038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007fd185ba5fa0 RCX: 00007fd18598d169
RDX: 0000000000000000 RSI: 0000200000003c80 RDI: 0000000000000000
RBP: 00007fd185a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd185ba5fa0 R15: 00007fff14148c28
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g36057 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:26440 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b88/0x5240 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x163/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
 kthread+0x7b9/0x940 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5856 Comm: syz-executor Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bac/0x2d40 kernel/smp.c:885
Code: 03 84 c0 75 7e 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 58 02 0c 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 08 fe 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00
RSP: 0018:ffffc900040974c0 EFLAGS: 00000293
RAX: ffffffff81b780bd RBX: 1ffff110170c823d RCX: ffff8880609a8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900040976c0 R08: ffffffff81b78088 R09: 1ffffffff20beece
R10: dffffc0000000000 R11: fffffbfff20beecf R12: ffff8880b873ad08
R13: ffff8880b86411e8 R14: ffff8880b873ad00 R15: 0000000000000000
FS:  00005555815dc500(0000) GS:ffff8881250ac000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58886d56c0 CR3: 000000006deac000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1275 [inline]
 flush_tlb_mm_range+0xb8d/0x13f0 arch/x86/mm/tlb.c:1365
 dup_mmap kernel/fork.c:791 [inline]
 dup_mm kernel/fork.c:1704 [inline]
 copy_mm+0x18c5/0x2170 kernel/fork.c:1756
 copy_process+0x17de/0x3d10 kernel/fork.c:2399
 kernel_clone+0x242/0x930 kernel/fork.c:2814
 __do_sys_clone kernel/fork.c:2957 [inline]
 __se_sys_clone kernel/fork.c:2941 [inline]
 __x64_sys_clone+0x268/0x2e0 kernel/fork.c:2941
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58879839d3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 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 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffc9bd80688 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f58879839d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555815dc7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 0000000000043562 R15: 00007ffc9bd80820
 </TASK>