rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=94ec/1/0x4000000000000000 softirq=19856/19863 fqs=1218
rcu: (detected by 0, t=10502 jiffies, g=34637, q=207 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10353 Comm: modprobe Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4798 [inline]
RIP: 0010:__lock_acquire+0x876/0x1fd0 kernel/locking/lockdep.c:5087
Code: 8b 5d 00 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00 55 ce 92 be 08 00 00 00 e8 82 9e 86 00 48 0f a3 1d 9a ac 5c 11 <73> 1a 48 69 c3 c8 00 00 00 48 8d 98 00 b4 9c 92 48 ba 00 00 00 00
RSP: 0018:ffffc90000a08950 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 000000000000006a RCX: ffffffff8171a85e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92ce5508
RBP: 0000000000000003 R08: ffffffff92ce550f R09: 1ffffffff259caa1
R10: dffffc0000000000 R11: fffffbfff259caa2 R12: 0000000000000004
R13: ffff88807b6b6598 R14: 0000000000000004 R15: ffff88807b6b6598
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff35603bd58 CR3: 000000005f48a000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x158/0x390 lib/debugobjects.c:763
debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
debug_deactivate+0x1b/0x200 kernel/time/hrtimer.c:484
__run_hrtimer kernel/time/hrtimer.c:1660 [inline]
__hrtimer_run_queues+0x30f/0xd00 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x109/0x3a0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x25b/0x530 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 d3 a8 86 00 f6 44 24 61 02 0f 85 8e 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:ffffc9000914f460 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001229e98 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8baad360 RDI: ffffffff8bfed300
RBP: ffffc9000914f5a8 R08: ffffffff92ce5507 R09: 1ffffffff259caa0
R10: dffffc0000000000 R11: fffffbfff259caa1 R12: 1ffff92001229e94
R13: dffffc0000000000 R14: ffffc9000914f4c0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:842 [inline]
pfn_valid+0x113/0x440 include/linux/mmzone.h:2016
page_table_check_clear+0x21/0x730 mm/page_table_check.c:68
zap_pte_range mm/memory.c:1452 [inline]
zap_pmd_range mm/memory.c:1597 [inline]
zap_pud_range mm/memory.c:1626 [inline]
zap_p4d_range mm/memory.c:1647 [inline]
unmap_page_range+0x1f7a/0x3610 mm/memory.c:1668
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1758
exit_mmap+0x2c6/0xd40 mm/mmap.c:3287
__mmput+0x115/0x3c0 kernel/fork.c:1345
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
do_syscall_64+0xfd/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f51f142fa90
Code: Unable to access opcode bytes at 0x7f51f142fa66.
RSP: 002b:00007ffe6026ab98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f51f1520860 RCX: 00007f51f142fa90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f51f1520860 R08: 00007ffe6026aa10 R09: 00007ffe6026aaf0
R10: 00007ffe6026aa50 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f51f1524658 R15: 0000000000000001
rcu: rcu_preempt kthread starved for 8059 jiffies! g34637 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:25072 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17d3/0x4a20 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6828
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2572
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 5101 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x1855/0x2960 kernel/smp.c:855
Code: 89 e6 83 e6 01 31 ff e8 d9 d5 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 84 d1 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 68 d1 0b 00 eb e4 44
RSP: 0018:ffffc900045b7440 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff110172a8809 RCX: ffff88805f208000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900045b7640 R08: ffffffff818923b7 R09: 1ffffffff259caa6
R10: dffffc0000000000 R11: fffffbfff259caa7 R12: dffffc0000000000
R13: ffff8880b9544048 R14: ffff8880b943f480 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c001073fc0 CR3: 000000000df32000 CR4: 0000000000350ef0
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:944 [inline]
flush_tlb_mm_range+0x330/0x5c0 arch/x86/mm/tlb.c:1030
tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:458 [inline]
tlb_flush_mmu+0x1a6/0x4e0 mm/mmu_gather.c:299
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392
exit_mmap+0x4b6/0xd40 mm/mmap.c:3300
__mmput+0x115/0x3c0 kernel/fork.c:1345
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
get_signal+0x176e/0x1850 kernel/signal.c:2907
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:212
do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f6dfb0a91b5
Code: Unable to access opcode bytes at 0x7f6dfb0a918b.
RSP: 002b:00007ffc6a2c14d0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00000000000002f8 RCX: 00007f6dfb0a91b5
RDX: 00007ffc6a2c1510 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffc6a2c159c R08: 0000000000000000 R09: 00007f6dfbe5c0b0
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000003ed6d R14: 000000000003ecc1 R15: 0000000000000003