rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P1793/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=186329, q=337 ncpus=2)
task:syz.9.7895      state:R  running task     stack:22120 pid:1793  tgid:1793  ppid:25084  task_flags:0x40064c flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:206 [inline]
RIP: 0010:unwind_next_frame+0x1c6/0x2390 arch/x86/kernel/unwind_orc.c:494
Code: 24 18 74 08 4c 89 ff e8 c8 95 b0 00 4d 8b 27 48 83 f3 01 48 c7 c2 40 43 a8 8b 49 29 dc 0f 84 a2 01 00 00 49 81 fc 00 00 00 81 <0f> 92 c0 49 81 fc 4c 6d 82 8b 0f 93 c1 08 c1 0f 85 e8 00 00 00 48
RSP: 0018:ffffc90003cfed18 EFLAGS: 00000206
RAX: 1ffff9200079fdc6 RBX: 0000000000000001 RCX: e613f8f5fa3c2a00
RDX: ffffffff8ba84340 RSI: ffffffff8c035860 RDI: ffffffff8c035820
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90003cfee38 R11: ffffffff81ad2180 R12: ffffffff818d6553
R13: ffffc90003cfee38 R14: ffffc90003cfede8 R15: ffffc90003cfee30
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf5/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:2952
 folios_put_refs+0x559/0x640 mm/swap.c:997
 folio_batch_release include/linux/pagevec.h:101 [inline]
 shmem_undo_range+0x49e/0x14b0 mm/shmem.c:1157
 shmem_truncate_range mm/shmem.c:1269 [inline]
 shmem_evict_inode+0x272/0xa70 mm/shmem.c:1397
 evict+0x504/0x9c0 fs/inode.c:810
 __dentry_kill+0x209/0x660 fs/dcache.c:669
 dput+0x19f/0x2b0 fs/dcache.c:911
 __fput+0x68e/0xa70 fs/file_table.c:476
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:961
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x1286/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:40 [inline]
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 irqentry_exit_to_user_mode+0x81/0x120 kernel/entry/common.c:73
 exc_general_protection+0x171/0x200 arch/x86/kernel/traps.c:792
 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:612
RIP: 0033:0x7f3f8578ebf1
RSP: 002b:0000200000000240 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f3f859b6090 RCX: 00007f3f8578ebe9
RDX: 00002000000000c0 RSI: 0000200000000240 RDI: 0000000000800080
RBP: 00007f3f85811e19 R08: 0000200000000300 R09: 0000200000000300
R10: 00002000000002c0 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f3f859b6128 R14: 00007f3f859b6090 R15: 00007ffe628b3668
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g186329 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=139907
rcu: rcu_preempt kthread starved for 10502 jiffies! g186329 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26464 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x47c/0x820 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 1773 Comm: syz.6.7887 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d c4 c6 1d 0c 48 89 de 5b e9 33 e2 58 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 10 c2 92 65 8b 15 48 81
RSP: 0000:ffffc90003817b38 EFLAGS: 00000097
RAX: ffffffff899f7f8a RBX: 0000000000000004 RCX: ffff88802837da00
RDX: 0000000000010000 RSI: 0000000004000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888056c5b083 R09: 1ffff1100ad8b610
R10: dffffc0000000000 R11: ffffed100ad8b611 R12: 0000000000000001
R13: ffff888056c5b008 R14: ffff888056c5b000 R15: 0000000004000001
FS:  0000555591781500(0000) GS:ffff888125aff000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000004d7b0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 taprio_set_budgets+0x1a7/0x3b0 net/sched/sch_taprio.c:671
 advance_sched+0x963/0xc90 net/sched/sch_taprio.c:982
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x52c/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+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0033:0x7efc0e856a82
Code: ff ff 48 8d 3d 56 be 1b 00 31 c0 e8 28 80 ff ff 48 8d 3d 47 c0 1b 00 31 c0 e8 1a 80 ff ff 66 2e 0f 1f 84 00 00 00 00 00 41 57 <41> 56 41 55 41 54 55 53 48 83 ec 18 48 8b 47 38 48 8b 57 40 48 39
RSP: 002b:00007ffc29a81250 EFLAGS: 00000246
RAX: 0000001b30424234 RBX: 00007efc0f6e5720 RCX: 0000000000000003
RDX: 0000001b3042422c RSI: 0000000000000004 RDI: 00007efc0f6e5720
RBP: fffffffffffffe94 R08: 0000000000000008 R09: 0000000000000164
R10: 00007efc0dbfb008 R11: 0000000000000013 R12: 000000000000016c
R13: 0000000000000164 R14: 0000000000000000 R15: 0000000000000000
 </TASK>