rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=6544/1/0x4000000000000000 softirq=25198/25198 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=26425, q=282 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6603 Comm: syz-executor Not tainted 6.14.0-rc6-syzkaller-00022-gb7f94fcf5546 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_preemption_disabled+0x37/0x120
Code: 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 1d 8c 79 02 74 65 8b 05 81 79 02 74 a9 ff ff ff 7f 74 26 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 0f 85 ce 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e
RSP: 0018:ffffc90000a28ae8 EFLAGS: 00000006
RAX: 46f6207fd291a300 RBX: 0000000000000001 RCX: ffffffff819cfa10
RDX: 0000000000000000 RSI: ffffffff8c2ac140 RDI: ffffffff8c802c20
RBP: ffffc90000a28c50 R08: ffffffff903bd877 R09: 1ffffffff2077b0e
R10: dffffc0000000000 R11: fffffbfff2077b0f R12: 1ffff92000145170
R13: ffffffff89fd56c4 R14: ffffc90000a28bd0 R15: dffffc0000000000
FS:  000055557e46c500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400000000240 CR3: 00000000346a6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lockdep_recursion_inc kernel/locking/lockdep.c:464 [inline]
 lock_release+0x1bc/0xa30 kernel/locking/lockdep.c:5871
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x9b4/0xca0 net/sched/sch_taprio.c:981
 __run_hrtimer kernel/time/hrtimer.c:1801 [inline]
 __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 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:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x18/0x70 kernel/kcov.c:217
Code: 1f 00 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 00 d5 03 00 65 8b 15 40 f6 41 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 2c 16 00 00
RSP: 0018:ffffc9001afff158 EFLAGS: 00000246
RAX: ffffffff82327bfe RBX: 0000000000000000 RCX: ffff88802ceb5a00
RDX: 0000000080000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffea0000918548 R08: ffffffff82327be7 R09: 1ffffffff28a2f08
R10: dffffc0000000000 R11: fffffbfff28a2f09 R12: 1ffffd40001230a9
R13: 0000000000000001 R14: ffff88801c55e690 R15: ffffea0000918540
 arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
 page_fixed_fake_head include/linux/page-flags.h:206 [inline]
 _compound_head include/linux/page-flags.h:247 [inline]
 PageAnon include/linux/page-flags.h:706 [inline]
 page_table_check_set+0x12e/0x540 mm/page_table_check.c:120
 __page_table_check_ptes_set+0x30f/0x410 mm/page_table_check.c:225
 page_table_check_ptes_set include/linux/page_table_check.h:74 [inline]
 set_ptes include/linux/pgtable.h:288 [inline]
 __copy_present_ptes mm/memory.c:968 [inline]
 copy_present_ptes mm/memory.c:1051 [inline]
 copy_pte_range mm/memory.c:1174 [inline]
 copy_pmd_range+0x4523/0x77b0 mm/memory.c:1262
 copy_pud_range mm/memory.c:1299 [inline]
 copy_p4d_range mm/memory.c:1323 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1421
 dup_mmap kernel/fork.c:748 [inline]
 dup_mm kernel/fork.c:1700 [inline]
 copy_mm+0x1269/0x2160 kernel/fork.c:1752
 copy_process+0x17d1/0x3cf0 kernel/fork.c:2403
 kernel_clone+0x223/0x870 kernel/fork.c:2815
 __do_sys_clone kernel/fork.c:2958 [inline]
 __se_sys_clone kernel/fork.c:2942 [inline]
 __x64_sys_clone+0x267/0x2e0 kernel/fork.c:2942
 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: 0033:0x7f0bca1839d3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd3a99f818 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0bca1839d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055557e46c7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000002affd R15: 00007ffd3a99f9b0
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g26425 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=10978
rcu: rcu_preempt kthread starved for 10502 jiffies! g26425 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:26104 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>