rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=3064/1/0x4000000000000000 softirq=28894/28896 fqs=149
rcu: 	(detected by 0, t=10502 jiffies, g=18653, q=243 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6905 Comm: syz.1.17 Not tainted 6.16.0-rc3-syzkaller-g8a20830f2dd1 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:473 [inline]
RIP: 0010:lock_is_held_type+0x10b/0x190 kernel/locking/lockdep.c:5944
Code: 0f 95 c0 31 db 39 c5 0f 94 c3 eb 05 bb 01 00 00 00 48 c7 c7 5c aa b5 8d e8 62 16 00 00 b8 ff ff ff ff 65 0f c1 05 95 73 3a 07 <83> f8 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02
RSP: 0018:ffffc90000a08c28 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 01339bdc205f3000
RDX: ffff8880625b1e00 RSI: ffffffff8db5aa5c RDI: ffffffff8be1b9c0
RBP: 00000000ffffffff R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200014117c R12: 0000000000000046
R13: ffff8880625b1e00 R14: ffff88807d331300 R15: 0000000000000001
FS:  00007f9307b746c0(0000) GS:ffff888125d82000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9307b73f98 CR3: 00000000787a2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_is_held include/linux/lockdep.h:249 [inline]
 advance_sched+0x160/0xc90 net/sched/sch_taprio.c:927
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </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+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 7b a4 65 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f3 8d 2e f6 65 8b 05 ec aa 37 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc9000417f8e0 EFLAGS: 00000206
RAX: 01339bdc205f3000 RBX: 0000000000000a02 RCX: 01339bdc205f3000
RDX: 0000000000000007 RSI: ffffffff8d96ed76 RDI: 0000000000000001
RBP: ffffc9000417f970 R08: ffffffff8f9fe4f7 R09: 1ffffffff1f3fc9e
R10: dffffc0000000000 R11: fffffbfff1f3fc9f R12: dffffc0000000000
R13: ffff8880b8627ac0 R14: ffff8880b8627ac0 R15: 1ffff9200082ff1c
 clock_was_set+0x63b/0x7c0 kernel/time/hrtimer.c:972
 timekeeping_inject_offset+0x35b/0x4b0 kernel/time/timekeeping.c:1446
 do_adjtimex+0x43f/0x9f0 kernel/time/timekeeping.c:2554
 do_clock_adjtime kernel/time/posix-timers.c:1162 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1174 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1165 [inline]
 __x64_sys_clock_adjtime+0x1f4/0x2b0 kernel/time/posix-timers.c:1165
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9306d8d169
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:00007f9307b74038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f9306fa6080 RCX: 00007f9306d8d169
RDX: 0000000000000000 RSI: 0000400000000040 RDI: 0000000000000000
RBP: 00007f9306e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9306fa6080 R15: 00007fff1f9701f8
 </TASK>
rcu: rcu_preempt kthread starved for 10204 jiffies! g18653 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:27128 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6878
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 6835 Comm: udevd Not tainted 6.16.0-rc3-syzkaller-g8a20830f2dd1 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0xf69/0x12d0 kernel/smp.c:885
Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 b0 79 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 5b 75 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 40 75 0b
RSP: 0000:ffffc90003e8f720 EFLAGS: 00000293
RAX: ffffffff81b4d830 RBX: ffff8880b863b040 RCX: ffff8880304c5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003e8f880 R08: ffffffff8f9fe4f7 R09: 1ffffffff1f3fc9e
R10: dffffc0000000000 R11: fffffbfff1f3fc9f R12: 1ffff110170e7f2d
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b873f968
FS:  00007f5a38750880(0000) GS:ffff888125c82000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d00dcb7be0 CR3: 0000000032a3a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:1361 [inline]
 flush_tlb_mm_range+0x6b1/0x12c0 arch/x86/mm/tlb.c:1451
 flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline]
 ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:101
 wp_page_copy mm/memory.c:3635 [inline]
 do_wp_page+0x1bc2/0x5800 mm/memory.c:4030
 handle_pte_fault mm/memory.c:6085 [inline]
 __handle_mm_fault+0x1144/0x5620 mm/memory.c:6212
 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6381
 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f5a387eab3b
Code: 04 07 0f 85 a9 00 00 00 f3 0f 6f 47 10 48 8b 57 18 66 48 0f 7e c0 48 3b 78 18 75 7b 48 3b 7a 10 75 75 48 8b 77 10 48 89 50 18 <66> 0f d6 42 10 48 81 f9 ff 03 00 00 76 28 48 8b 57 20 48 85 d2 74
RSP: 002b:00007ffec35cc5e0 EFLAGS: 00010246
RAX: 00007f5a38927290 RBX: 000000000000a640 RCX: 000000000000a641
RDX: 000055d00dcb7bd0 RSI: 00007f5a38927290 RDI: 000055d00dcad370
RBP: 00007f5a38926ac0 R08: 000000000000a640 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000055d00dcaac10
R13: 00007f5a38926ac0 R14: 000000000000a640 R15: 00007f5a38926ac0
 </TASK>