rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=44393, q=171 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10498 (4295021962-4295011464), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10498 jiffies! g44393 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:25976 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12843 Comm: syz.1.1731 Not tainted 6.13.0-rc1-syzkaller-00001-ge70140ba0d2b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
RIP: 0010:lock_is_held_type+0x10e/0x190 kernel/locking/lockdep.c:5922
Code: 95 c0 31 db 44 39 f0 0f 94 c3 eb 05 bb 01 00 00 00 48 c7 c7 80 a8 0a 8c e8 7f 1a 00 00 b8 ff ff ff ff 65 0f c1 05 b2 b8 3a 74 <83> f8 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02
RSP: 0018:ffffc90000007cf8 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff88802cae5a00
RDX: ffff88802cae5a00 RSI: ffffffff8c0aa880 RDI: ffffffff8c5e90a0
RBP: 0000000000000002 R08: ffffffff818cd3ce R09: 0000000000000000
R10: ffff888029916340 R11: ffffed1005322c6b R12: 0000000000000046
R13: ffff88802cae5a00 R14: 00000000ffffffff R15: ffff8880b862c898
FS:  00007ff9f0ff36c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2fdc6f CR3: 0000000056fe4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000016 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_is_held include/linux/lockdep.h:249 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1705 [inline]
 __hrtimer_run_queues+0x2d9/0xd30 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 5e 9e 3c f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 43 f4 a2 f5 65 8b 05 f4 44 39 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc9000c026b20 EFLAGS: 00000206
RAX: 35651f9cb6409600 RBX: 1ffff92001804d68 RCX: ffffffff817b241a
RDX: dffffc0000000000 RSI: ffffffff8c0a9680 RDI: 0000000000000001
RBP: ffffc9000c026bb0 R08: ffffffff9428288f R09: 1ffffffff2850511
R10: dffffc0000000000 R11: fffffbfff2850512 R12: dffffc0000000000
R13: 1ffff92001804d64 R14: ffffc9000c026b40 R15: 0000000000000246
 __debug_object_init+0x27c/0x470 lib/debugobjects.c:755
 rhashtable_init_noprof+0x703/0xa60 lib/rhashtable.c:1081
 br_mdb_hash_init+0x26/0x90 net/bridge/br_multicast.c:5111
 br_dev_init+0x47/0x390 net/bridge/br_device.c:126
 register_netdevice+0x6d7/0x1b00 net/core/dev.c:10520
 br_dev_newlink+0x27/0x100 net/bridge/br_netlink.c:1563
 rtnl_newlink_create+0x2df/0xa30 net/core/rtnetlink.c:3780
 __rtnl_newlink net/core/rtnetlink.c:3897 [inline]
 rtnl_newlink+0x17dd/0x24f0 net/core/rtnetlink.c:4007
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6917
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583
 ___sys_sendmsg net/socket.c:2637 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff9f0180849
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:00007ff9f0ff3058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff9f0346160 RCX: 00007ff9f0180849
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007ff9f01f3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff9f0346160 R15: 00007fffa2181718
 </TASK>