rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
 P5952/2:b..l

rcu: 	(detected by 0, t=10502 jiffies, g=34633, q=116 ncpus=2)
task:kworker/u8:28   state:R
  running task     stack:24608 pid:5952  tgid:5952  ppid:2      flags:0x00004000
Workqueue: netns cleanup_net

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5407 [inline]
 __schedule+0xf27/0x5d10 kernel/sched/core.c:6748
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7070
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5722
Code: c1 05 7a a7 96 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90003abf6f8 EFLAGS: 00000206

RAX: dffffc0000000000 RBX: 1ffff92000757ee1 RCX: 00000000ad33bb5e
RDX: 0000000000000001 RSI: ffffffff8b2cb200 RDI: ffffffff8b9039c0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff284dc58
R10: ffffffff9426e2c7 R11: 0000000000000005 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8dbb17a0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 rcu_read_lock include/linux/rcupdate.h:781 [inline]
 br_get_link_af_size_filtered+0xb7/0xd50 net/bridge/br_netlink.c:104
 rtnl_link_get_af_size net/core/rtnetlink.c:625 [inline]
 if_nlmsg_size+0x52e/0x9f0 net/core/rtnetlink.c:1103
 rtmsg_ifinfo_build_skb+0x6d/0x280 net/core/rtnetlink.c:4064
 unregister_netdevice_many_notify+0x953/0x19f0 net/core/dev.c:11223
 unregister_netdevice_many net/core/dev.c:11277 [inline]
 default_device_exit_batch+0x85b/0xae0 net/core/dev.c:11760
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:178
 cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: rcu_preempt kthread starved for 10104 jiffies! g34633 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:28352 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5407 [inline]
 __schedule+0xf27/0x5d10 kernel/sched/core.c:6748
 __schedule_loop kernel/sched/core.c:6825 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6840
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.10.0-syzkaller-00017-g5e0497553643 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 38 d5 1b 75 48 8b 00 a8 08 75 0c 66 90 0f 00 2d e8 72 b3 00 fb f4 <fa> c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8d807d70 EFLAGS: 00000246

RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8ae7e6e9
RDX: 0000000000000001 RSI: ffff88801b2a0800 RDI: ffff88801b2a0864
RBP: ffff88801b2a0864 R08: 0000000000000001 R09: ffffed1017246fdd
R10: ffff8880b9237eeb R11: 0000000000000000 R12: ffff88801b7f8000
R13: ffffffff8e7459c0 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3f53bc6fac CR3: 00000000655c2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:702
 cpuidle_enter_state+0x85/0x500 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x313/0x3f0 kernel/sched/idle.c:332
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
 rest_init+0x16b/0x2b0 init/main.c:747
 start_kernel+0x3df/0x4c0 init/main.c:1103
 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
 common_startup_64+0x13e/0x148
 </TASK>