rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 1, t=10502 jiffies, g=16725, q=645 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294961015-4294950513), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g16725 f0x2 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:27224 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256
irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:schedule_timeout+0x12e/0x270 kernel/time/sleep_timeout.c:100
Code: 31 d2 48 c7 c1 80 0c 6d 8b 49 c7 c0 80 b3 9e 99 e8 d7 02 66 f6 48 89 5c 24 30 4c 89 f7 e8 fa 16 66 f6 e8 15 a7 fe ff 4c 89 f7 6d 26 66 f6 4c 89 f7 e8 d5 03 66 f6 43 80 7c 3d 00 00 74 0c 48
RSP: 0018:ffffc90000157a40 EFLAGS: 00000246
RAX: 0000000000208040 RBX: 00000000ffffbe72 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8bc0cec0 RDI: ffffc90000157a60
RBP: ffffc90000157b30 R08: ffffffff8f9dbb77 R09: 1ffffffff1f3b76e
R10: dffffc0000000000 R11: fffffbfff1f3b76f R12: 1ffff9200002af48
R13: 1ffffffff1bc2240 R14: ffffc90000157a60 R15: dffffc0000000000
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6652 Comm: syz.3.28 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:kasan_check_range+0x1d4/0x2c0 mm/kasan/generic.c:200
Code: 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 12 41 80 3b 00 0f 85 b8 00 00 00 49 ff c3 49 ff cc 75 ee 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 8e b9 21 09 cc 45 84 ff 75 63 41 f7
RSP: 0018:ffffc9000216fb90 EFLAGS: 00000256
RAX: ffffffff81b47801 RBX: 0000000000000048 RCX: ffffffff81b478d9
RDX: 0000000000000001 RSI: 0000000000000048 RDI: ffffc9000216fc20
RBP: 0000000000000000 R08: ffffc9000216fc67 R09: 1ffff9200042df8c
R10: dffffc0000000000 R11: fffff5200042df8d R12: 0000000000000009
R13: ffffc9000216fc20 R14: fffff5200042df8d R15: 1ffff9200042df84
FS: 00007f4f15ffe6c0(0000) GS:ffff888125d2d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000007630e000 CR4: 00000000003526f0
Call Trace:
__asan_memset+0x22/0x50 mm/kasan/shadow.c:84
futex_wait+0xa9/0x360 kernel/futex/waitwake.c:708
do_futex+0x333/0x420 kernel/futex/syscalls.c:130
__do_sys_futex kernel/futex/syscalls.c:207 [inline]
__se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:188
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f1698eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4f15ffe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f4f16bd5fa8 RCX: 00007f4f1698eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4f16bd5fa8
RBP: 00007f4f16bd5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f16bd6038 R14: 00007fff5acce880 R15: 00007fff5acce968