rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5826/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=21305, q=299 ncpus=2)
task:syz-executor    state:R  running task     stack:19496 pid:5826  tgid:5826  ppid:5819   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x14ed/0x5040 kernel/sched/core.c:6866
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7193
 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:lock_acquire+0x222/0x340 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 b0 e3 be 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 ca 51 03 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d d7 95 07
RSP: 0018:ffffc9000402f1f8 EFLAGS: 00000282
RAX: a59a2535902ae600 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000005a44979c RSI: ffffffff8db80c24 RDI: ffffffff8be082e0
RBP: ffffffff8173fd85 R08: ffffffff8173fd85 R09: ffffffff8e13f2e0
R10: ffffc9000402f358 R11: ffffffff81acaae0 R12: 0000000000000002
R13: ffffffff8e13f2e0 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:302 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1166 [inline]
 unwind_next_frame+0xc2/0x23d0 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf5/0x1f0 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1409 [inline]
 __free_frozen_pages+0xb99/0xd10 mm/page_alloc.c:2946
 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline]
 __kasan_populate_vmalloc+0x1b2/0x1d0 mm/kasan/shadow.c:424
 kasan_populate_vmalloc include/linux/kasan.h:580 [inline]
 alloc_vmap_area+0xdc4/0x14e0 mm/vmalloc.c:2129
 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3224
 __vmalloc_node_range_noprof+0x371/0x16a0 mm/vmalloc.c:4016
 __vmalloc_node_noprof mm/vmalloc.c:4116 [inline]
 vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4194
 __do_replace+0xab/0x970 net/ipv4/netfilter/ip_tables.c:1046
 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
 do_ipt_set_ctl+0xa0d/0xcd0 net/ipv4/netfilter/ip_tables.c:1635
 nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101
 do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2337
 __sys_setsockopt net/socket.c:2362 [inline]
 __do_sys_setsockopt net/socket.c:2368 [inline]
 __se_sys_setsockopt net/socket.c:2365 [inline]
 __x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2365
 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: 0033:0x7f610e99163a
RSP: 002b:00007ffd8ef2ced8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ffd8ef2cf60 RCX: 00007f610e99163a
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000408 R09: 00007ffd8ef2d317
R10: 00007f610ebb8c40 R11: 0000000000000206 R12: 00007f610ebb8be0
R13: 00007ffd8ef2cefc R14: 0000000000000000 R15: 00007f610ebba020
 </TASK>
rcu: rcu_preempt kthread starved for 6030 jiffies! g21305 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:28248 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x14ed/0x5040 kernel/sched/core.c:6866
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7193
 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__free_object+0x458/0x5e0 lib/debugobjects.c:524
Code: c6 06 48 8b 5c 24 10 f7 c3 00 02 00 00 74 05 e8 8e 76 2f fd 9c 58 a9 00 02 00 00 75 1d f7 c3 00 02 00 00 74 01 fb 48 83 c4 18 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 f3 c7 c3 06 f7
RSP: 0018:ffffc90000157a58 EFLAGS: 00000282
RAX: 0000000000000006 RBX: 0000000000000282 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8d99cad6 RDI: ffffffff8be082e0
RBP: dffffc0000000000 R08: ffffffff8fa23f77 R09: 1ffffffff1f447ee
R10: dffffc0000000000 R11: fffffbfff1f447ef R12: ffff8880b873c5c8
R13: 1ffff110170e78b8 R14: ffff8880b873c5c0 R15: ffff888034835318
 free_object lib/debugobjects.c:532 [inline]
 debug_object_free+0x2b2/0x400 lib/debugobjects.c:976
 schedule_timeout+0x13b/0x270 kernel/time/sleep_timeout.c:103
 rcu_gp_fqs_loop+0x301/0x11b0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9b/0x2d0 kernel/rcu/tree.c:2297
 kthread+0x389/0x480 kernel/kthread.c:467
 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:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
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: cc cc cc cc 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 63 7e 2b 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 000002c2
RAX: 00000000005f2e9f RBX: ffffffff81970ece RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d99cad6 RDI: ffffffff8be082e0
RBP: ffffc90000197f10 R08: ffff8880b873375b R09: 1ffff110170e66eb
R10: dffffc0000000000 R11: ffffed10170e66ec R12: ffffffff8fa23f70
R13: 1ffff11003ad6b58 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125d0c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc386d3f40 CR3: 0000000074926000 CR4: 00000000003526f0
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>