rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=12033, q=234 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294957967-4294947465), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g12033 f0x2 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:26792 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5313 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696
 __schedule_loop kernel/sched/core.c:6774 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6789
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2060
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2262
 kthread+0x711/0x8a0 kernel/kthread.c:463
 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: 1 UID: 0 PID: 6220 Comm: rm Not tainted 6.16.0-rc3-next-20250627-syzkaller-g2aeda9592360 #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+0xf72/0x12d0 kernel/smp.c:885
Code: 01 31 ff e8 60 69 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 0b 65 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 f0 64 0b 00 eb e5 44 89 f9 80 e1 07
RSP: 0018:ffffc90004baf5a0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b873b180 RCX: ffff8880342e8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004baf700 R08: ffffffff8fa18937 R09: 1ffffffff1f43126
R10: dffffc0000000000 R11: fffffbfff1f43127 R12: 1ffff110170c8339
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b86419c8
FS:  0000000000000000(0000) GS:ffff888125d1e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b7be49e9c CR3: 000000000df36000 CR4: 00000000003526f0
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
 tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:490 [inline]
 tlb_flush_mmu+0x1a7/0x680 mm/mmu_gather.c:403
 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497
 free_ldt_pgtables+0x17b/0x320 arch/x86/kernel/ldt.c:411
 arch_exit_mmap arch/x86/include/asm/mmu_context.h:234 [inline]
 exit_mmap+0x17c/0xb50 mm/mmap.c:1270
 __mmput+0x118/0x420 kernel/fork.c:1120
 exit_mm+0x1da/0x2c0 kernel/exit.c:581
 do_exit+0x648/0x2300 kernel/exit.c:947
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1100
 __do_sys_exit_group kernel/exit.c:1111 [inline]
 __se_sys_exit_group kernel/exit.c:1109 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1109
 x64_sys_call+0x21ba/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f4b7bfa86c5
Code: Unable to access opcode bytes at 0x7f4b7bfa869b.
RSP: 002b:00007fffa3303ac8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4b7c0a9fe8 RCX: 00007f4b7bfa86c5
RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000
RBP: 0000000000000001 R08: 00007fffa3303a58 R09: 0000000000000000
R10: 00007fffa33038f0 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4b7c0a8680 R15: 00007f4b7c0aa000
 </TASK>