rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=d0f4/1/0x4000000000000000 softirq=183690/183690 fqs=0
rcu: (detected by 1, t=10502 jiffies, g=180745, q=460 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 29136 Comm: syz.7.5530 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:2030 [inline]
RIP: 0010:__hrtimer_run_queues+0x421/0x9c0 kernel/time/hrtimer.c:2096
Code: 18 38 d0 7f 08 84 c0 0f 85 92 04 00 00 41 0f b6 6c 24 3b 31 ff 89 ee e8 9d 49 14 00 40 84 ed 0f 85 15 fd ff ff e8 7f 4f 14 00 <65> 48 8b 05 af 6a 6e 12 48 8d a8 88 0b 00 00 48 89 e8 48 c1 e8 03
RSP: 0018:ffffc90000007e98 EFLAGS: 00000046
RAX: 0000000080010001 RBX: dffffc0000000000 RCX: ffffffff81f61553
RDX: ffff888063680000 RSI: ffffffff81f61561 RDI: ffff888063680000
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888048f1b300
R13: ffffffff89c7ef60 R14: ffff8880b8428640 R15: ffff8880b8428690
FS: 0000000000000000(0000) GS:ffff888123dd8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000009b40 CR3: 00000000341cd000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000009 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
__sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__pte_needs_invert arch/x86/include/asm/pgtable-invert.h:18 [inline]
RIP: 0010:protnone_mask arch/x86/include/asm/pgtable-invert.h:24 [inline]
RIP: 0010:pte_pfn arch/x86/include/asm/pgtable.h:259 [inline]
RIP: 0010:vm_normal_page+0xb1/0x390 mm/memory.c:770
Code: 8b 5c 24 28 31 ff 48 89 de e8 5b a0 ab ff 48 85 db 74 7f e8 b1 a5 ab ff 48 89 d8 31 ff 48 bd ff ff ff ff ff 00 00 00 48 f7 d0 <83> e0 01 48 f7 d8 48 31 d8 48 c1 e8 0c 49 89 c7 48 21 c5 89 d8 25
RSP: 0018:ffffc90006c6f4c0 EFLAGS: 00000246
RAX: 7fffffff9de68ff8 RBX: 8000000062197007 RCX: ffffffff825ebf25
RDX: ffff888063680000 RSI: ffffffff825ebf2f RDI: 0000000000000000
RBP: 000000ffffffffff R08: 0000000000000007 R09: 0000000000000000
R10: 8000000062197007 R11: 0000000000000000 R12: 1ffff92000d8de99
R13: ffff8880364b2280 R14: 00007f7ae0592000 R15: 8000000062197007
zap_present_ptes mm/memory.c:1700 [inline]
do_zap_pte_range mm/memory.c:1832 [inline]
zap_pte_range mm/memory.c:1934 [inline]
zap_pmd_range mm/memory.c:2020 [inline]
zap_pud_range mm/memory.c:2048 [inline]
zap_p4d_range mm/memory.c:2069 [inline]
__zap_vma_range+0xf67/0x4a30 mm/memory.c:2109
unmap_vmas+0x299/0x5f0 mm/memory.c:2178
exit_mmap+0x1ef/0xa00 mm/mmap.c:1300
__mmput+0x12a/0x410 kernel/fork.c:1187
mmput+0x67/0x80 kernel/fork.c:1210
exit_mm kernel/exit.c:615 [inline]
do_exit+0x8b1/0x2ae0 kernel/exit.c:997
do_group_exit+0xd5/0x2a0 kernel/exit.c:1152
get_signal+0x1ec7/0x21e0 kernel/signal.c:3046
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x139/0x6f0 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7ae119e019
Code: Unable to access opcode bytes at 0x7f7ae119dfef.
RSP: 002b:00007f7adf3f60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f7ae1425fa8 RCX: 00007f7ae119e019
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f7ae1425fac
RBP: 00007f7ae1425fa0 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7ae1426038 R14: 00007fff5de34400 R15: 00007fff5de344e8
rcu: rcu_preempt kthread starved for 10502 jiffies! g180745 f0x0 RCU_GP_WAIT_FQS(5) ->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:28568 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x125c/0x6730 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7326
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2325
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 29128 Comm: syz.6.5526 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0x58e/0x1870 kernel/smp.c:912
Code: b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 c4 9b 0c 00 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 a8 10 00 00 8b 45 08 31
RSP: 0018:ffffc9000671fb20 EFLAGS: 00000246
RAX: 0000000000080000 RBX: 0000000000000000 RCX: ffffc9000db69000
RDX: 0000000000080000 RSI: ffffffff81fdc91c RDI: ffff8880327f8000
RBP: ffff8880b8443680 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: ffffed10170886d1 R14: 0000000000000001 R15: ffff8880b853c880
FS: 00007f1e9f9f66c0(0000) GS:ffff888123ed8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 000000006370e000 CR4: 00000000003526f0
Call Trace:
clock_was_set+0x61c/0x850 kernel/time/hrtimer.c:999
do_settimeofday64+0x330/0x4d0 kernel/time/timekeeping.c:1684
do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195
__do_sys_clock_settime kernel/time/posix-timers.c:1139 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1123 [inline]
__x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1123
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ea179e019
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:00007f1e9f9f6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f1ea1a26090 RCX: 00007f1ea179e019
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f1ea183500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1ea1a26128 R14: 00007f1ea1a26090 R15: 00007ffdab55a7e8