rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=20261, q=576 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294962965-4294952463), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g20261 f0x0 RCU_GP_ONOFF(3) ->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:27544 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1821/0x5740 kernel/sched/core.c:7189
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
 irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_gp_slow_is_suppressed kernel/rcu/tree.c:1365 [inline]
RIP: 0010:rcu_gp_slow kernel/rcu/tree.c:1372 [inline]
RIP: 0010:rcu_gp_init+0xb5c/0x15b0 kernel/rcu/tree.c:1939
Code: ca f1 84 00 e9 29 fc ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 52 fc ff ff 4c 89 e7 e8 4f f1 84 00 e9 45 fc ff ff 8b 1d 24 e0 9c 18 <4c> 8b 35 dd e0 9c 18 4d 85 f6 74 7f 4c 89 f7 be 04 00 00 00 e8 2b
RSP: 0018:ffffc90000157c40 EFLAGS: 00000246
RAX: ffffffff8e962e80 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8dfab61d RDI: ffffffff8c28b0e0
RBP: ffffc90000157d30 R08: ffffffff9030c6f7 R09: 1ffffffff20618de
R10: dffffc0000000000 R11: fffffbfff20618df R12: ffffffff8e962a3a
R13: dffffc0000000000 R14: ffffffff8e962e80 R15: 1ffff9200002af90
 rcu_gp_kthread+0x18b/0x2b0 kernel/rcu/tree.c:2287
 kthread+0x389/0x470 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6377 Comm: syz.5.104 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__kasan_check_write+0x0/0x20 mm/kasan/shadow.c:36
Code: 48 8b 0c 24 31 d2 e9 8f e5 ff ff 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 89 f6 48 8b 0c 24 ba 01 00 00 00 e9 5c e5 ff ff 66 66
RSP: 0018:ffffc90000a08c38 EFLAGS: 00000056
RAX: 00000000ffffff01 RBX: ffff88807ca572a8 RCX: ffffffff81a2579c
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000a08c80
RBP: ffffc90000a08d00 R08: ffff88807ca572ab R09: 1ffff1100f94ae55
R10: dffffc0000000000 R11: ffffed100f94ae56 R12: 1ffff9200014118c
R13: ffff88807ca572b0 R14: dffffc0000000000 R15: 1ffff1100f94ae56
FS:  00007f2d726406c0(0000) GS:ffff88812538a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000001b000 CR3: 0000000032ef7000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 instrument_read_write include/linux/instrumented.h:55 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1301 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock+0x12b/0x2f0 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:342 [inline]
 advance_sched+0xb4/0xc20 net/sched/sch_taprio.c:930
 __run_hrtimer kernel/time/hrtimer.c:1930 [inline]
 __hrtimer_run_queues+0x3c0/0xa20 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:instrument_read_write include/linux/instrumented.h:55 [inline]
RIP: 0010:llist_add_batch include/linux/llist.h:242 [inline]
RIP: 0010:llist_add include/linux/llist.h:265 [inline]
RIP: 0010:__smp_call_single_queue+0x12b/0x470 kernel/smp.c:426
Code: 00 00 fc ff df 41 80 3c 06 00 74 08 4c 89 e7 e8 7b 62 77 00 4d 89 2c 24 4c 89 ff be 08 00 00 00 e8 1a 64 77 00 48 8d 7c 24 40 <be> 08 00 00 00 e8 0b 64 77 00 48 8b 44 24 40 31 f6 f0 4d 0f b1 27
RSP: 0018:ffffc9000331f900 EFLAGS: 00000256
RAX: dffffc0000000001 RBX: 1ffff92000663f24 RCX: ffffffff81b9a0b6
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc9000331f940
RBP: ffffc9000331f9b8 R08: ffff8880b863c187 R09: 1ffff110170c7830
R10: dffffc0000000000 R11: ffffed10170c7831 R12: ffffc9000331fa80
R13: 0000000000000000 R14: 1ffff92000663f50 R15: ffff8880b863c180
 generic_exec_single+0x191/0x430 kernel/smp.c:464
 smp_call_function_single_async+0x79/0x110 kernel/smp.c:747
 rdmsr_safe_on_cpu+0x165/0x2b0 arch/x86/lib/msr-smp.c:179
 msr_read+0x150/0x250 arch/x86/kernel/msr.c:66
 vfs_read+0x20c/0xa70 fs/read_write.c:572
 ksys_read+0x150/0x270 fs/read_write.c:717
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d7179ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2d72640028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f2d71a15fa0 RCX: 00007f2d7179ce59
RDX: 0000000000018ff8 RSI: 0000200000019680 RDI: 0000000000000006
RBP: 00007f2d71832d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d71a16038 R14: 00007f2d71a15fa0 R15: 00007ffd9da2be48
 </TASK>