rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P14010/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=62025, q=861 ncpus=2)
task:syz.0.1990      state:R  running task     stack:27000 pid:14010 tgid:14008 ppid:12915  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x149b/0x4fd0 kernel/sched/core.c:6863
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7190
 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unit_alloc+0x1ad/0x210 kernel/bpf/memalloc.c:818
Code: 20 e8 e7 ad d5 ff eb 1f e8 e0 ad d5 ff e9 d5 fe ff ff e8 d6 ad d5 ff e8 31 57 6e 09 4d 85 ed 74 e0 e8 c7 ad d5 ff fb 4c 89 f0 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 ff f6 24 ff cc e8 ae ad d5 ff 90
RSP: 0018:ffffc9000e86f980 EFLAGS: 00000246
RAX: ffff888041295000 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9002031d000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 000000000000000f R08: ffffffff8f822577 R09: 1ffffffff1f044ae
R10: dffffc0000000000 R11: fffffbfff1f044af R12: ffffe8ffffc45f50
R13: 0000000000000200 R14: ffff888041295000 R15: 000000000000000e
 bpf_mem_cache_alloc+0x82/0xb0 kernel/bpf/memalloc.c:943
 lpm_trie_node_alloc kernel/bpf/lpm_trie.c:297 [inline]
 trie_update_elem+0x120/0x1170 kernel/bpf/lpm_trie.c:342
 bpf_map_update_value+0x751/0x920 kernel/bpf/syscall.c:294
 generic_map_update_batch+0x5a9/0x810 kernel/bpf/syscall.c:2038
 bpf_map_do_batch+0x39b/0x630 kernel/bpf/syscall.c:5647
 __sys_bpf+0x690/0x860 kernel/bpf/syscall.c:-1
 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6272 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6272
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f26b2d8f749
RSP: 002b:00007f26b3c6e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f26b2fe6090 RCX: 00007f26b2d8f749
RDX: 0000000000000038 RSI: 0000200000000000 RDI: 000000000000001a
RBP: 00007f26b2e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26b2fe6128 R14: 00007f26b2fe6090 R15: 00007ffc1b8cf708
 </TASK>
rcu: rcu_preempt kthread starved for 10425 jiffies! g62025 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:27416 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x149b/0x4fd0 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6960
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 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+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 1e a4 b6 f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 53 b1 0e 00 f3 0f 1e fa fb f4 <e9> f3 a3 b6 f5 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 000002c6
RAX: 00000000017e4e21 RBX: ffffffff819713ee RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d792134 RDI: ffffffff8bc083e0
RBP: ffffc90000197f10 R08: ffff8880b87336db R09: 1ffff110170e66db
R10: dffffc0000000000 R11: ffffed10170e66dc R12: ffffffff8f822570
R13: 1ffff1100385eb70 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc858f0202d CR3: 000000007508c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1be/0x4d0 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog