rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=21205, q=912 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294963383-4294952881), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g21205 f0x2 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:27360 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16de/0x4c50 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x127/0x260 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2fd/0x1520 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:2248
 kthread+0x70a/0x890 kernel/kthread.c:464
 ret_from_fork+0x47/0x80 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: 0 UID: 0 PID: 6782 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-00099-g94305e83eccb #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+0xe59/0x11a0 kernel/smp.c:885
Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 c0 66 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 7b 62 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 60 62 0b
RSP: 0018:ffffc9000389f500 EFLAGS: 00000293
RAX: ffffffff81b2e3a0 RBX: ffff8880b883ad80 RCX: ffff88805dd19e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000389f660 R08: ffffffff8f1243b7 R09: 1ffffffff1e24876
R10: dffffc0000000000 R11: fffffbfff1e24877 R12: 1ffff11017127ea9
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b893f548
FS:  0000000000000000(0000) GS:ffff888126913000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc11c4db22 CR3: 000000000d736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1291 [inline]
 flush_tlb_mm_range+0x686/0x1240 arch/x86/mm/tlb.c:1381
 tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:480 [inline]
 tlb_flush_mmu+0x1a3/0x670 mm/mmu_gather.c:403
 tlb_finish_mmu+0xbf/0x1d0 mm/mmu_gather.c:496
 exit_mmap+0x470/0xb60 mm/mmap.c:1297
 __mmput+0x118/0x410 kernel/fork.c:1380
 exit_mm+0x1d6/0x2b0 kernel/exit.c:589
 do_exit+0x851/0x2540 kernel/exit.c:940
 do_group_exit+0x218/0x2d0 kernel/exit.c:1102
 get_signal+0x125a/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x91/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x86/0x110 kernel/entry/common.c:218
 do_syscall_64+0x87/0x150 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7efc11b8dee7
Code: Unable to access opcode bytes at 0x7efc11b8debd.
RSP: 002b:00007fff0503a788 EFLAGS: 00000206 ORIG_RAX: 000000000000010a
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007efc11b8dee7
RDX: 00007efc11c1231e RSI: 00000000ffffff9c RDI: 00007fff0503a820
RBP: 00007fff0503a7cc R08: 0000000000000013 R09: 00007fff0503a4d7
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002
R13: 00000000000927c0 R14: 0000000000026873 R15: 00007fff0503a820
 </TASK>