rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P19417/1:b..l..
rcu: 	(detected by 1, t=10573 jiffies, g=161629, q=850 ncpus=2)
task:syz-executor    state:R  running task     stack:21848 pid:19417 tgid:19417 ppid:19405  task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 kernel/sched/core.c:7382
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
 irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0x11df/0x2550 arch/x86/kernel/unwind_orc.c:670
Code: 89 3b 43 0f b6 44 25 00 84 c0 0f 85 29 11 00 00 49 8d 46 36 c6 00 00 49 8d 5e 50 4c 8b 6c 24 18 48 8b 44 24 30 42 0f b6 04 20 <84> c0 4c 8b 04 24 0f 85 46 0e 00 00 42 0f b6 44 25 00 84 c0 0f 85
RSP: 0018:ffffc90003f17200 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90003f172f8 RCX: 0000000000000000
RDX: ffffffff92216b42 RSI: 0000000000000000 RDI: ffffc90003f17308
RBP: 1ffffffff2442d68 R08: ffffc90003f17307 R09: 0000000000000000
R10: ffffc90003f172f8 R11: fffff520007e2e61 R12: dffffc0000000000
R13: ffffffff92216b3e R14: ffffc90003f172a8 R15: ffffc90003f172f0
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:183
 __reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1403 [inline]
 free_unref_folios+0xdc6/0x14e0 mm/page_alloc.c:3014
 folios_put_refs+0x9e9/0xb30 mm/folio.c:1039
 folio_batch_release include/linux/folio_batch.h:101 [inline]
 shmem_undo_range+0x547/0x15d0 mm/shmem.c:1371
 shmem_truncate_range mm/shmem.c:1496 [inline]
 shmem_evict_inode+0x240/0xb00 mm/shmem.c:1627
 evict+0x624/0xb50 fs/inode.c:823
 filename_unlinkat+0x43f/0x610 fs/namei.c:5735
 __do_sys_unlink fs/namei.c:5766 [inline]
 __se_sys_unlink+0x2e/0x140 fs/namei.c:5763
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f227cb9e647
RSP: 002b:00007fff1aa74678 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f227cb9e647
RDX: 00007fff1aa746a0 RSI: 00007fff1aa74730 RDI: 00007fff1aa74730
RBP: 00007fff1aa74730 R08: 00007fff1aa75730 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff1aa757c0
R13: 00007f227cc35f63 R14: 00000000001e76fb R15: 00007fff1aa75800
 </TASK>
rcu: rcu_preempt kthread starved for 10473 jiffies! g161629 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:27960 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
 kthread+0x38b/0x480 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:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: ab 7a 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 03 2b 0f 00 fb f4 <e9> 3c 17 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001b7e40 EFLAGS: 00000242
RAX: 0000000003ce0d73 RBX: ffffffff819c92cc RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e47f8e6 RDI: ffffffff8c6e9080
RBP: ffffc900001b7f10 R08: ffff8880b8533d9b R09: 1ffff110170a67b3
R10: dffffc0000000000 R11: ffffed10170a67b4 R12: 0000000000000000
R13: 1ffff11003eda7d0 R14: 1ffff92000036fd0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888123b66000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f80215886c0 CR3: 00000000584f8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/kernel/process.c:767 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:768
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x1cc/0x540 kernel/sched/idle.c:355
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x157
 </TASK>