rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=82ac/1/0x4000000000000000 softirq=35155/35170 fqs=1
rcu: (detected by 0, t=10502 jiffies, g=30345, q=1939 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9829 Comm: syz-executor Not tainted 6.13.0-rc3-syzkaller-00691-gae418e95dd93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:240 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4875 [inline]
RIP: 0010:__lock_acquire+0x8ac/0x2100 kernel/locking/lockdep.c:5176
Code: 00 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 a8 2b 94 be 08 00 00 00 e8 fe 18 8b 00 48 0f a3 1d e6 ea b0 12 73 1a <48> 69 c3 c8 00 00 00 48 8d 98 40 27 c3 93 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90000a188f0 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 000000000000006c RCX: ffffffff817abd92
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942ba888
RBP: 0000000000000000 R08: ffffffff942ba88f R09: 1ffffffff2857511
R10: dffffc0000000000 R11: fffffbfff2857512 R12: 0000000000000001
R13: ffff88802ce9a928 R14: 0000000000000001 R15: ffff88802ce9a928
FS: 0000555587cd3500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8afb40440 CR3: 000000005d32e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__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_activate+0x17f/0x580 lib/debugobjects.c:818
debug_hrtimer_activate kernel/time/hrtimer.c:428 [inline]
debug_activate kernel/time/hrtimer.c:469 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1076
__run_hrtimer kernel/time/hrtimer.c:1756 [inline]
__hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:119 [inline]
RIP: 0010:lock_acquire+0x120/0x550 kernel/locking/lockdep.c:5825
Code: c0 d0 65 1a 90 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 ff 02 00 00 83 3d 7d b6 9f 0e 00 0f 84 42 01 00 00 65 8b 05 20 db 87 7e <85> c0 0f 85 8f 01 00 00 65 48 8b 1c 25 00 d6 03 00 48 81 c3 dc 0a
RSP: 0018:ffffc90003fdf880 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff817aaf14
RDX: 0000000000000000 RSI: ffffffff8c5faec0 RDI: ffffffff8c5fae80
RBP: ffffc90003fdf9d8 R08: ffffffff901a3337 R09: 1ffffffff2034666
R10: dffffc0000000000 R11: fffffbfff2034667 R12: 1ffff920007fbf18
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
fs_reclaim_acquire+0xaf/0x130 mm/page_alloc.c:3868
might_alloc include/linux/sched/mm.h:318 [inline]
prepare_alloc_pages+0x147/0x5b0 mm/page_alloc.c:4510
__alloc_pages_noprof+0x16f/0x710 mm/page_alloc.c:4740
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
vm_area_alloc_pages mm/vmalloc.c:3589 [inline]
__vmalloc_area_node mm/vmalloc.c:3667 [inline]
__vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3844
vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3998
kcov_ioctl+0x56/0x640 kernel/kcov.c:716
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
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: 0033:0x7f789b98592b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007fffcc2560b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000080000 RCX: 00007f789b98592b
RDX: 0000000000080000 RSI: ffffffff80086301 RDI: 00000000000000d8
RBP: 00007f789bb76038 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10500 jiffies! g30345 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:24400 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.13.0-rc3-syzkaller-00691-gae418e95dd93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f3/0x2c60 kernel/smp.c:884
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 56 e9 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 01 e5 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 e5 e4
RSP: 0018:ffffc90000ab76e0 EFLAGS: 00000293
RAX: ffffffff81938f0b RBX: 1ffff110170e88e9 RCX: ffff8880206e8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000ab78e0 R08: ffffffff81938eda R09: 1ffffffff2857510
R10: dffffc0000000000 R11: fffffbfff2857511 R12: dffffc0000000000
R13: ffff8880b8744748 R14: ffff8880b863fac0 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5627656af8 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2114 [inline]
text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2324
text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2522
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xbc/0x260 mm/kfence/core.c:849
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244