rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2640 jiffies s: 10285 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9023 Comm: syz.1.948 Not tainted 6.12.0-rc4-syzkaller-00202-gc05c62850a8f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline]
RIP: 0010:preempt_count_sub+0x5d/0x170 kernel/sched/core.c:5834
Code: 22 65 8b 05 9d a9 a0 7e 89 c1 81 e1 ff ff ff 7f 39 d9 7c 27 81 fb fe 00 00 00 77 07 0f b6 c0 85 c0 74 5f 65 8b 05 7b a9 a0 7e <f7> db 65 01 1d 72 a9 a0 7e 5b 41 5e c3 cc cc cc cc 90 e8 bc 60 56
RSP: 0018:ffffc90000a18b88 EFLAGS: 00000006
RAX: 0000000000010003 RBX: 0000000000000001 RCX: 0000000000010003
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffffc90000a18c30 R08: ffffffff9a66dd23 R09: 1ffffffff34cdba4
R10: dffffc0000000000 R11: fffffbfff34cdba5 R12: dffffc0000000000
R13: 1ffff92000143174 R14: dffffc0000000000 R15: 0000000000000046
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c3f7fcd58 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0xdd/0x140 kernel/locking/spinlock.c:194
 debug_object_deactivate+0x2d5/0x390 lib/debugobjects.c:778
 debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
 __run_hrtimer kernel/time/hrtimer.c:1659 [inline]
 __hrtimer_run_queues+0x305/0xd50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 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:194 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217
Code: c0 d7 03 00 65 8b 15 f0 ff 6e 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc
RSP: 0018:ffffc9000342f280 EFLAGS: 00000246
RAX: ffffffff81ec4206 RBX: ffffea00019d5d40 RCX: ffff88802ed89e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000040 R08: ffffffff81ec41dc R09: 1ffffd400033aba8
R10: dffffc0000000000 R11: fffff9400033aba9 R12: ffffea00019d5d40
R13: ffffea00019d5d40 R14: 0000000000000001 R15: 0000000000000000
 __folio_rmap_sanity_checks+0x196/0x670 include/linux/rmap.h:217
 __folio_remove_rmap mm/rmap.c:1534 [inline]
 folio_remove_rmap_ptes+0x3a/0x480 mm/rmap.c:1612
 zap_present_folio_ptes mm/memory.c:1520 [inline]
 zap_present_ptes mm/memory.c:1579 [inline]
 zap_pte_range mm/memory.c:1621 [inline]
 zap_pmd_range mm/memory.c:1739 [inline]
 zap_pud_range mm/memory.c:1768 [inline]
 zap_p4d_range mm/memory.c:1789 [inline]
 unmap_page_range+0x1a92/0x40e0 mm/memory.c:1810
 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1900
 exit_mmap+0x275/0xc40 mm/mmap.c:1874
 __mmput+0x115/0x390 kernel/fork.c:1347
 exit_mm+0x220/0x310 kernel/exit.c:571
 do_exit+0x9b2/0x28e0 kernel/exit.c:926
 do_group_exit+0x207/0x2c0 kernel/exit.c:1088
 get_signal+0x16a3/0x1740 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf6077e719
Code: Unable to access opcode bytes at 0x7fbf6077e6ef.
RSP: 002b:00007fbf6160c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000000ac RBX: 00007fbf60935f80 RCX: 00007fbf6077e719
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000006
RBP: 00007fbf607f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbf60935f80 R15: 00007ffed69d6128
 </TASK>