rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=075c/1/0x4000000000000000 softirq=24342/24344 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8151/1:b..l
rcu: 	(detected by 0, t=10504 jiffies, g=20405, q=369 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8213 Comm: syz.5.728 Not tainted 6.12.0-next-20241128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:advance_sched+0x9a/0xca0 net/sched/sch_taprio.c:924
Code: 28 00 74 08 48 89 df e8 f4 3d 31 f8 48 8b 1b 48 83 c3 36 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 bb 0b 00 00 4c 0f bf 23 <49> 8d 7e a8 48 89 bc 24 80 00 00 00 e8 35 74 fd 01 e8 40 bd fa 01
RSP: 0018:ffffc90000a18c70 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88807e4d4036 RCX: ffff88801efd1e00
RDX: 0000000000010000 RSI: 0000000000000000 RDI: ffff88805cd12340
RBP: dffffc0000000000 R08: ffffffff818cd93f R09: 1ffffffff20333d6
R10: dffffc0000000000 R11: ffffffff89d92830 R12: 0000000000000002
R13: ffffffff89d92830 R14: ffff88805cd12340 R15: ffff88801efd28c8
FS:  00007f03e2b156c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f03e2b14fb8 CR3: 000000007fea8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ca 33 a4 f5 48 89 df e8 02 7b a5 f5 e8 ed 9c d0 f5 fb bf 01 00 00 00 <e8> c2 e4 96 f5 65 8b 05 03 34 2d 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc900142e67d0 EFLAGS: 00000286
RAX: 38214ebeb63f1f00 RBX: ffff8881442a2008 RCX: ffffffff817b270a
RDX: dffffc0000000000 RSI: ffffffff8c0a96a0 RDI: 0000000000000001
RBP: ffffc900142e6958 R08: ffffffff942c48b7 R09: 1ffffffff2858916
R10: dffffc0000000000 R11: fffffbfff2858917 R12: 00000000000002c9
R13: 1ffff9200285cd14 R14: 0000000000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 add_to_swap_cache+0xdb1/0x1d80 mm/swap_state.c:128
 add_to_swap+0x137/0x350 mm/swap_state.c:203
 shrink_folio_list+0x284f/0x8cb0 mm/vmscan.c:1247
 reclaim_folio_list+0x13c/0x5f0 mm/vmscan.c:2143
 reclaim_pages+0x5b8/0x700 mm/vmscan.c:2180
 madvise_cold_or_pageout_pte_range+0x295a/0x32a0 mm/madvise.c:558
 walk_pmd_range mm/pagewalk.c:130 [inline]
 walk_pud_range mm/pagewalk.c:226 [inline]
 walk_p4d_range mm/pagewalk.c:264 [inline]
 walk_pgd_range+0xc3d/0x17e0 mm/pagewalk.c:305
 __walk_page_range+0x15f/0x700 mm/pagewalk.c:412
 walk_page_range_mm+0x58f/0x7c0 mm/pagewalk.c:505
 madvise_pageout_page_range mm/madvise.c:617 [inline]
 madvise_pageout mm/madvise.c:644 [inline]
 madvise_vma_behavior mm/madvise.c:1261 [inline]
 madvise_walk_vmas mm/madvise.c:1497 [inline]
 do_madvise+0x391c/0x4d70 mm/madvise.c:1684
 __do_sys_madvise mm/madvise.c:1700 [inline]
 __se_sys_madvise mm/madvise.c:1698 [inline]
 __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1698
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f03e1d80849
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:00007f03e2b15058 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f03e1f46080 RCX: 00007f03e1d80849
RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000000020000000
RBP: 00007f03e1df3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f03e1f46080 R15: 00007ffdcbac3428
 </TASK>
task:syz.0.715       state:R  running task     stack:23448 pid:8151  tgid:8150  ppid:5828   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5853
Code: 2b 00 74 08 4c 89 f7 e8 6a b6 8f 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9001265f280 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920024cbe5c RCX: ffff88805ebca8d8
RDX: dffffc0000000000 RSI: ffffffff8c0aa8a0 RDI: ffffffff8c5f8da0
RBP: ffffc9001265f3c8 R08: ffffffff942c4887 R09: 1ffffffff2858910
R10: dffffc0000000000 R11: fffffbfff2858911 R12: 1ffff920024cbe58
R13: dffffc0000000000 R14: ffffc9001265f2e0 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 __pte_offset_map+0x9e/0x380 mm/pgtable-generic.c:287
 pte_offset_map_rw_nolock+0x3b/0x140 mm/pgtable-generic.c:327
 handle_pte_fault+0x1f0/0x66b0 mm/memory.c:5786
 __handle_mm_fault mm/memory.c:5944 [inline]
 handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6112
 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 <f3> a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc9001265fb90 EFLAGS: 00050202
RAX: 0000000000000001 RBX: 000000002027e000 RCX: 0000000000000080
RDX: 0000000000000001 RSI: 000000002027e000 RDI: ffffc9001265fd10
RBP: ffffc9001265ff00 R08: ffffc9001265fd8f R09: 1ffff920024cbfb1
R10: dffffc0000000000 R11: fffff520024cbfb2 R12: 000000002027e000
R13: 00000000fffffff2 R14: ffffc9001265fd10 R15: 0000000000000080
 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
 _inline_copy_from_user include/linux/uaccess.h:178 [inline]
 _copy_from_user+0x7f/0xc0 lib/usercopy.c:18
 copy_from_user include/linux/uaccess.h:212 [inline]
 do_pages_stat mm/migrate.c:2472 [inline]
 kernel_move_pages mm/migrate.c:2558 [inline]
 __do_sys_move_pages mm/migrate.c:2569 [inline]
 __se_sys_move_pages+0x150b/0x1cc0 mm/migrate.c:2564
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9d15f80849
RSP: 002b:00007f9d16ce4058 EFLAGS: 00000246 ORIG_RAX: 0000000000000117
RAX: ffffffffffffffda RBX: 00007f9d16145fa0 RCX: 00007f9d15f80849
RDX: 0000000020000000 RSI: 20000000000001ab RDI: 0000000000000000
RBP: 00007f9d15ff3986 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9d16145fa0 R15: 00007ffff4cea168
 </TASK>
rcu: rcu_preempt kthread starved for 10504 jiffies! g20405 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:25976 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 7527 Comm: kworker/u8:9 Not tainted 6.12.0-next-20241128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f8/0x2c60 kernel/smp.c:884
Code: 89 e6 83 e6 01 31 ff e8 66 e9 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 11 e5 0b 00 eb 38 f3 90 42 0f b6 04 23 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 f5 e4 0b 00 eb e4 44
RSP: 0018:ffffc9000b5876e0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff110170e88e9 RCX: ffff88802e8bda00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000b5878e0 R08: ffffffff81938fda R09: 1ffffffff2858910
R10: dffffc0000000000 R11: fffffbfff2858911 R12: dffffc0000000000
R13: ffff8880b8744748 R14: ffff8880b863fac0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557c8135c8 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2118 [inline]
 text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2328
 text_poke_flush arch/x86/kernel/alternative.c:2519 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2526
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate+0xbc/0x260 mm/kfence/core.c:849
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>