rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=33d/1/0x4000000000000000 softirq=9909/9909 fqs=0 
	(detected by 0, t=10502 jiffies, g=12993, q=576)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5118 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__netif_schedule+0x50/0x2c0 net/core/dev.c:3103
Code: 84 24 80 00 00 00 48 c7 44 24 20 b3 8a b5 41 48 c7 44 24 28 3a 28 b6 8b 48 c7 44 24 30 c0 a1 d5 87 4c 8d 6c 24 20 49 c1 ed 03 <48> b8 f1 f1 f1 f1 00 f2 f2 f2 48 b9 00 00 00 00 00 fc ff df 49 89
RSP: 0018:ffffc90000dd0ba0 EFLAGS: 00000806
RAX: 5dc5c08d1bd89300 RBX: ffff88805c96a000 RCX: ffff88807551d940
RDX: 0000000000010000 RSI: ffffffff8a59a460 RDI: ffff88805c96a000
RBP: ffffc90000dd0c70 R08: dffffc0000000000 R09: fffffbfff1ff7819
R10: fffffbfff1ff7819 R11: 1ffffffff1ff7818 R12: ffff88805c96a2e8
R13: 1ffff920001ba178 R14: ffff88805c96a000 R15: 186fbddf1c000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96b724df98 CR3: 000000000be8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 advance_sched+0x74c/0x940 net/sched/sch_taprio.c:770
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:PagePoisoned include/linux/page-flags.h:218 [inline]
RIP: 0010:PageSlab include/linux/page-flags.h:356 [inline]
RIP: 0010:__page_memcg+0x62/0x140 include/linux/memcontrol.h:406
Code: fd 48 c1 ed 03 42 80 7c 2d 00 00 74 08 4c 89 ff e8 33 f1 fa ff 49 8b 07 49 89 dc a8 01 0f 85 80 00 00 00 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 0f f1 fa ff 4d 8b 24 24 42 80 7c
RSP: 0018:ffffc900037cf3e8 EFLAGS: 00000a06
RAX: 1ffffd400005dde8 RBX: ffffea00002eef40 RCX: 1ffffd400005ddef
RDX: 0000000000000000 RSI: ffffffff8a59a460 RDI: ffffea00002eef78
RBP: 1ffffd400005dde9 R08: dffffc0000000000 R09: fffffbfff1ff7819
R10: fffffbfff1ff7819 R11: 1ffffffff1ff7818 R12: ffffea00002eef40
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea00002eef48
 page_memcg include/linux/memcontrol.h:459 [inline]
 lock_page_memcg+0x137/0x410 mm/memcontrol.c:2052
 page_remove_rmap+0x2a/0x10f0 mm/rmap.c:1351
 zap_pte_range mm/memory.c:1384 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0xfbc/0x2520 mm/memory.c:1576
 unmap_vmas+0x11b/0x230 mm/memory.c:1653
 exit_mmap+0x38f/0x5f0 mm/mmap.c:3216
 __mmput+0x115/0x3b0 kernel/fork.c:1127
 exit_mm+0x567/0x6c0 kernel/exit.c:550
 do_exit+0x5a1/0x20a0 kernel/exit.c:870
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f96b7fef719
Code: Unable to access opcode bytes at RIP 0x7f96b7fef6ef.
RSP: 002b:00007f96b724e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f96b81a7060 RCX: 00007f96b7fef719
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f96b81a7064
RBP: 00007f96b81a7058 R08: 00370ea70a4ca8b4 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 00007f96b81a7064
R13: 0000000000000000 R14: 00007ffdcdf84fc0 R15: 00007ffdcdf850a8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g12993 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3682
rcu: rcu_preempt kthread starved for 10502 jiffies! g12993 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:27296 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x29e/0x11b0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x98/0x350 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </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 PID: 5118 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:timerqueue_add+0x26/0x1f0 lib/timerqueue.c:38
Code: 00 00 cc cc 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 49 89 f4 49 89 fe 49 bd 00 00 00 00 00 fc ff df e8 1d 1d 7a fd 4c 89 e0 <48> c1 e8 03 48 89 44 24 10 42 80 3c 28 00 74 08 4c 89 e7 e8 12 85
RSP: 0018:ffffc90000dd0c98 EFLAGS: 00000006
RAX: ffff88805c96a340 RBX: ffff88805c96a340 RCX: ffff88807551d940
RDX: 0000000000010000 RSI: ffff88805c96a340 RDI: ffff8880b912a390
RBP: 0000000000000002 R08: dffffc0000000000 R09: fffffbfff1ad323e
R10: fffffbfff1ad323e R11: 1ffffffff1ad323d R12: ffff88805c96a340
R13: dffffc0000000000 R14: ffff8880b912a390 R15: ffff8880b912a284
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f96b724df98 CR3: 000000000be8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 enqueue_hrtimer+0x19b/0x370 kernel/time/hrtimer.c:1082
 __run_hrtimer kernel/time/hrtimer.c:1707 [inline]
 __hrtimer_run_queues+0x65a/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:PagePoisoned include/linux/page-flags.h:218 [inline]
RIP: 0010:PageSlab include/linux/page-flags.h:356 [inline]
RIP: 0010:__page_memcg+0x62/0x140 include/linux/memcontrol.h:406
Code: fd 48 c1 ed 03 42 80 7c 2d 00 00 74 08 4c 89 ff e8 33 f1 fa ff 49 8b 07 49 89 dc a8 01 0f 85 80 00 00 00 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 0f f1 fa ff 4d 8b 24 24 42 80 7c
RSP: 0018:ffffc900037cf3e8 EFLAGS: 00000a06
RAX: 1ffffd400005dde8 RBX: ffffea00002eef40 RCX: 1ffffd400005ddef
RDX: 0000000000000000 RSI: ffffffff8a59a460 RDI: ffffea00002eef78
RBP: 1ffffd400005dde9 R08: dffffc0000000000 R09: fffffbfff1ff7819
R10: fffffbfff1ff7819 R11: 1ffffffff1ff7818 R12: ffffea00002eef40
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea00002eef48
 page_memcg include/linux/memcontrol.h:459 [inline]
 lock_page_memcg+0x137/0x410 mm/memcontrol.c:2052
 page_remove_rmap+0x2a/0x10f0 mm/rmap.c:1351
 zap_pte_range mm/memory.c:1384 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0xfbc/0x2520 mm/memory.c:1576
 unmap_vmas+0x11b/0x230 mm/memory.c:1653
 exit_mmap+0x38f/0x5f0 mm/mmap.c:3216
 __mmput+0x115/0x3b0 kernel/fork.c:1127
 exit_mm+0x567/0x6c0 kernel/exit.c:550
 do_exit+0x5a1/0x20a0 kernel/exit.c:870
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f96b7fef719
Code: Unable to access opcode bytes at RIP 0x7f96b7fef6ef.
RSP: 002b:00007f96b724e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f96b81a7060 RCX: 00007f96b7fef719
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f96b81a7064
RBP: 00007f96b81a7058 R08: 00370ea70a4ca8b4 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 00007f96b81a7064
R13: 0000000000000000 R14: 00007ffdcdf84fc0 R15: 00007ffdcdf850a8
 </TASK>