rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=452c/1/0x4000000000000000 softirq=14006/14008 fqs=1
rcu: (detected by 1, t=10505 jiffies, g=20133, q=7 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13219 Comm: syz-executor177 Not tainted 6.5.0-rc2-syzkaller-00345-gc2782531397f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:lock_acquire+0x241/0x520 kernel/locking/lockdep.c:5764
Code: 4c 89 f7 e8 01 64 79 00 48 c7 44 24 60 00 00 00 00 9c 8f 44 24 60 42 80 3c 2b 00 74 08 4c 89 f7 e8 44 63 79 00 f6 44 24 61 02 <0f> 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e
RSP: 0018:ffffc9000c43f6a0 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92001887ee0 RCX: ffffffff816b75c5
RDX: 0000000000000000 RSI: ffffffff8b0aa1c0 RDI: ffffffff8b58a4c0
RBP: ffffc9000c43f7e8 R08: dffffc0000000000 R09: 1ffffffff20f6267
R10: dffffc0000000000 R11: fffffbfff20f6268 R12: 1ffff92001887edc
R13: dffffc0000000000 R14: ffffc9000c43f700 R15: 0000000000000046
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000010 CR3: 000000007d897000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
vga_put drivers/pci/vgaarb.c:536 [inline]
vga_arb_release+0x233/0xaf0 drivers/pci/vgaarb.c:1456
__fput+0x3f8/0x950 fs/file_table.c:384
task_work_run+0x24a/0x300 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0x68f/0x2290 kernel/exit.c:874
do_group_exit+0x206/0x2c0 kernel/exit.c:1024
get_signal+0x1709/0x17e0 kernel/signal.c:2877
arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:308
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff7c0bcb369
Code: Unable to access opcode bytes at 0x7ff7c0bcb33f.
RSP: 002b:00007ff7c0b8c238 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ff7c0c55308 RCX: 00007ff7c0bcb369
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff7c0c5530c
RBP: 00007ff7c0c55300 R08: 00007ff7c0b8c6c0 R09: 00007ff7c0b8c6c0
R10: 00007ff7c0b8c6c0 R11: 0000000000000246 R12: 00007ff7c0c5530c
R13: 0000000000000000 R14: 00007ffe7df150f0 R15: 00007ffe7df151d8
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.258 msecs
rcu: rcu_preempt kthread starved for 10500 jiffies! g20133 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:26952 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6710
schedule+0xc3/0x180 kernel/sched/core.c:6786
schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1609
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1808
kthread+0x2b8/0x350 kernel/kthread.c:389
ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 57 Comm: kworker/u4:4 Not tainted 6.5.0-rc2-syzkaller-00345-gc2782531397f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:296 [inline]
RIP: 0010:smp_call_function_many_cond+0x1864/0x27d0 kernel/smp.c:835
Code: 01 31 ff e8 de 17 0b 00 41 83 e5 01 4c 8b 6c 24 60 75 07 e8 1e 14 0b 00 eb 41 f3 90 48 b8 00 00 00 00 00 fc ff df 0f b6 04 03 <84> c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 f9 13 0b 00 eb db 44
RSP: 0018:ffffc90001587780 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff1101730897d RCX: ffff8880176c1dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90001587980 R08: ffffffff8180f162 R09: 1ffffffff20f6260
R10: dffffc0000000000 R11: fffffbfff20f6261 R12: ffff8880b9844be8
R13: ffff8880b993d0c8 R14: ffff8880b993d0c0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000000d130000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1003
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2001 [inline]
text_poke_bp_batch+0x2d7/0x960 arch/x86/kernel/alternative.c:2211
text_poke_flush arch/x86/kernel/alternative.c:2402 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2409
arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x132/0x250 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:831
process_one_work+0x92c/0x12c0 kernel/workqueue.c:2597
worker_thread+0xa63/0x1210 kernel/workqueue.c:2748
kthread+0x2b8/0x350 kernel/kthread.c:389
ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000