rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P14936/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=93709, q=256 ncpus=2)
task:rm state:R running task stack:24360 pid:14936 ppid:14876 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x15ae/0x4660 kernel/sched/core.c:6700
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:212
Code: 00 0f 0b 0f 1f 80 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d 4c 8b 05 0d 48 89 de 5b e9 b3 a3 57 00 cc cc cc 0f 1e fa 48 8b 04 24 65 48 8b 0d e0 d2 7c 7e 65 8b 15 e1 d2 7c
RSP: 0018:ffffc90003ee7678 EFLAGS: 00000206
RAX: ffffffff81e89bdf RBX: ffff888030bca370 RCX: 0000000000000000
RDX: ffff888030bc9e00 RSI: 00000000058601af RDI: 0000000000000000
RBP: ffffc90003ee77b0 R08: 0000000000002800 R09: 00000000f3e4562e
R10: 000000005aa98320 R11: fffffbfff1d18dce R12: dffffc0000000000
R13: 1ffff1100617946e R14: 00000000058601af R15: 1ffff920007dced4
save_stack+0x149/0x230 mm/page_owner.c:130
__reset_page_owner+0x4e/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1182 [inline]
free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2505
release_pages+0x208a/0x2300 mm/swap.c:1022
tlb_batch_pages_flush mm/mmu_gather.c:99 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:294 [inline]
tlb_flush_mmu+0x379/0x510 mm/mmu_gather.c:301
tlb_finish_mmu+0xf4/0x220 mm/mmu_gather.c:425
exit_mmap+0x428/0xb90 mm/mmap.c:3315
__mmput+0x118/0x3a0 kernel/fork.c:1357
exit_mm+0x23f/0x340 kernel/exit.c:570
do_exit+0x909/0x2530 kernel/exit.c:871
do_group_exit+0x22d/0x2f0 kernel/exit.c:1026
__do_sys_exit_group kernel/exit.c:1037 [inline]
__se_sys_exit_group kernel/exit.c:1035 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1035
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa7959426c5
RSP: 002b:00007ffdda77a708 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fa795a43fe8 RCX: 00007fa7959426c5
RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000
RBP: 0000000000000001 R08: 00007ffdda77a698 R09: 0000000000000000
R10: 00007ffdda77a530 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa795a42680 R15: 00007fa795a44000
rcu: rcu_preempt kthread starved for 10498 jiffies! g93709 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:26856 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x15ae/0x4660 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14944 Comm: syz.6.1560 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:check_preemption_disabled+0x1/0x110 lib/smp_processor_id.c:13
Code: e9 6e ff ff ff cc cc cc cc f3 0f 1e fa 48 c7 c7 c0 f7 1c 8b 48 c7 c6 00 f8 1c 8b eb 0c 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 <41> 57 41 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc90000007a30 EFLAGS: 00000046
RAX: 1ffff110054088da RBX: 997bb0045d2c6495 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff8acadce0 RDI: ffffffff8b1cf820
RBP: ffffc90000007b50 R08: ffffffff8e8c6e6f R09: 1ffffffff1d18dcd
R10: dffffc0000000000 R11: fffffbfff1d18dce R12: ffff88802a044708
R13: dffffc0000000000 R14: ffff88802a0446d0 R15: 1ffff92000000f54
FS: 00007f100c3df6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fe07ff8 CR3: 0000000023b7c000 CR4: 00000000003506f0
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_release+0x541/0x8c0 kernel/locking/lockdep.c:5776
debug_objects_fill_pool+0xcc/0x790 lib/debugobjects.c:617
debug_object_activate+0x36/0x500 lib/debugobjects.c:705
debug_hrtimer_activate kernel/time/hrtimer.c:450 [inline]
debug_activate kernel/time/hrtimer.c:504 [inline]
enqueue_hrtimer+0x34/0x380 kernel/time/hrtimer.c:1100
__run_hrtimer kernel/time/hrtimer.c:1771 [inline]
__hrtimer_run_queues+0x62f/0xc10 kernel/time/hrtimer.c:1818
hrtimer_interrupt+0x39d/0x980 kernel/time/hrtimer.c:1880
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x267/0x8f0 kernel/sched/core.c:5255
Code: 2e 09 85 c0 0f 84 30 01 00 00 48 85 db 0f 85 4f 01 00 00 cc d5 04 00 00 4c 89 e7 e8 43 02 38 09 e8 7e 0b 30 00 fb 4c 8b 65 b8 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc90000bbf8a0 EFLAGS: 00000286
RAX: 9ab9b1e2b9d01400 RBX: 0000000000000000 RCX: 9ab9b1e2b9d01400
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: ffffffff8b1cf820
RBP: ffffc90000bbf8f0 R08: ffffffff8e8c6e6f R09: 1ffffffff1d18dcd
R10: dffffc0000000000 R11: fffffbfff1d18dce R12: ffff88802a043c00
R13: 1ffff110171c79a9 R14: dffffc0000000000 R15: ffff8880b8e3cd48
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0x15b6/0x4660 kernel/sched/core.c:6700
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
RIP: 0010:_raw_spin_lock_irqsave+0xa/0x100 kernel/locking/spinlock.c:161
Code: 00 00 45 31 c9 ff 74 24 08 e8 32 ba d2 f6 48 83 c4 08 48 89 df 5b e9 75 0c d4 f6 0f 1f 44 00 00 f3 0f 1e fa 55 48 89 e5 41 57 <41> 56 41 54 53 48 83 e4 e0 48 83 ec 60 48 89 fb 65 48 8b 04 25 28
RSP: 0018:ffffc90000bbfc80 EFLAGS: 00000206
RAX: 000ffff88802b73a RBX: ffff88802b73aea8 RCX: 00000000000072b8
RDX: 0000000000000000 RSI: ffffffff8acadce0 RDI: ffffffff974e4ce0
RBP: ffffc90000bbfc88 R08: ffffffff8e8c6e6f R09: 1ffffffff1d18dcd
R10: dffffc0000000000 R11: fffffbfff1d18dce R12: ffffffff974e4cd8
R13: 0000000000000003 R14: ffffffff8ac9f840 R15: ffff88802b73aea8
__debug_object_init+0x5c/0x450 lib/debugobjects.c:632
prog_array_map_alloc+0x6e/0x200 kernel/bpf/arraymap.c:1106
map_create+0x877/0x12f0 kernel/bpf/syscall.c:1247
__sys_bpf+0x651/0x890 kernel/bpf/syscall.c:5459
__do_sys_bpf kernel/bpf/syscall.c:5581 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5579 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f100b59de59
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:00007f100c3df028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f100b826180 RCX: 00007f100b59de59
RDX: 0000000000000048 RSI: 0000200000000740 RDI: 0000000000000000
RBP: 00007f100b633e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f100b826218 R14: 00007f100b826180 R15: 00007ffd1a309718