rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7869/1:b..l
rcu: 	(detected by 0, t=10533 jiffies, g=195241, q=221656 ncpus=2)
task:syz-executor    state:R  running task     stack:22584 pid:7869  tgid:7869  ppid:7868   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 40 6c 43 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 62 27 f2 11 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 7f 70 46 0a cc 48 8d 3d 87 61 da
RSP: 0018:ffffc90003a3e308 EFLAGS: 00000282
RAX: 36cf17e257828700 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000230f4832 RSI: ffffffff8e69f0cc RDI: ffffffff8c6dac80
RBP: ffff88803334ddc0 R08: ffffffff8177f1df R09: 0000000000000000
R10: ffffc90003a3e498 R11: fffff52000747c95 R12: ffffffff8ed5c920
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
 unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
 __unwind_start+0x514/0x660 arch/x86/kernel/unwind_orc.c:787
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:183
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
 __slab_free+0x274/0x2c0 mm/slub.c:5823
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4683 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 __kmalloc_cache_noprof+0x29f/0x600 mm/slub.c:5559
 _kmalloc_noprof include/linux/slab.h:991 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 ____ip_mc_inc_group+0x518/0xdb0 net/ipv4/igmp.c:1601
 __ip_mc_inc_group net/ipv4/igmp.c:1639 [inline]
 ip_mc_inc_group net/ipv4/igmp.c:1645 [inline]
 ip_mc_up+0x115/0x2e0 net/ipv4/igmp.c:1950
 inetdev_event+0xfc3/0x15e0 net/ipv4/devinet.c:1630
 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2313 [inline]
 call_netdevice_notifiers net/core/dev.c:2327 [inline]
 netif_open+0x10f/0x190 net/core/dev.c:1752
 dev_open+0x101/0x220 net/core/dev_api.c:202
 bond_enslave+0xeb2/0x3b10 drivers/net/bonding/bond_main.c:2089
 do_set_master+0x563/0x720 net/core/rtnetlink.c:3076
 do_setlink+0xe7b/0x4670 net/core/rtnetlink.c:3278
 rtnl_changelink net/core/rtnetlink.c:3910 [inline]
 __rtnl_newlink net/core/rtnetlink.c:4081 [inline]
 rtnl_newlink+0x15a3/0x1c30 net/core/rtnetlink.c:4220
 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7137
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2575
 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline]
 netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1364
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800
 __sock_sendmsg net/socket.c:815 [inline]
 __sys_sendto+0x408/0x5a0 net/socket.c:2281
 __do_sys_sendto net/socket.c:2288 [inline]
 __se_sys_sendto net/socket.c:2284 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2284
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa41f15e98e
RSP: 002b:00007ffc1b86ecd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000055557cef4500 RCX: 00007fa41f15e98e
RDX: 0000000000000028 RSI: 00007fa41ff54670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffc1b86ed54 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fa41ff54670 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 2209 jiffies! g195241 f0x2 RCU_GP_WAIT_FQS(5) ->state=R ->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:27496 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7376
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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: 5599 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:its_return_thunk+0x0/0x10 arch/x86/lib/retpoline.S:437
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 fb 65 49 f5 cc
RSP: 0018:ffffc90000a175f8 EFLAGS: 00000246
RAX: ffffffff89b0144b RBX: 0000000000000000 RCX: ffff88801296be80
RDX: 8000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000a17c18 R08: 0000000000000100 R09: 0000000000000000
R10: ffffc90000a17d20 R11: fffff52000142fae R12: ffff888053fa16c8
R13: 1ffffffff20f5abb R14: 0000000000000001 R15: dffffc0000000000
FS:  0000555592224540(0000) GS:ffff888124dca000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc863a50ccf CR3: 000000007455c000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __skb_flow_dissect+0x5fb/0x6d50 net/core/flow_dissector.c:1138
 fib6_rules_early_flow_dissect include/net/ip6_fib.h:702 [inline]
 ip6_route_input+0x619/0xb20 net/ipv6/route.c:2666
 ip6_rcv_finish+0x141/0x280 net/ipv6/ip6_input.c:117
 ip_sabotage_in+0x1e1/0x270 net/bridge/br_netfilter_hooks.c:988
 nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
 nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
 nf_hook include/linux/netfilter.h:280 [inline]
 NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
 __netif_receive_skb_one_core net/core/dev.c:6297 [inline]
 __netif_receive_skb net/core/dev.c:6410 [inline]
 netif_receive_skb_internal net/core/dev.c:6496 [inline]
 netif_receive_skb+0x278/0xbf0 net/core/dev.c:6555
 NF_HOOK+0xa4/0x3a0 include/linux/netfilter.h:325
 br_handle_frame_finish+0x1136/0x1950 net/bridge/br_input.c:-1
 br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
 br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:325 [inline]
 br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
 nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
 br_handle_frame+0x1329/0x1600 net/bridge/br_input.c:451
 __netif_receive_skb_core+0x989/0x30c0 net/core/dev.c:6184
 __netif_receive_skb_list_core+0x24d/0x830 net/core/dev.c:6372
 __netif_receive_skb_list net/core/dev.c:6439 [inline]
 netif_receive_skb_list_internal+0x995/0xcf0 net/core/dev.c:6530
 gro_normal_list include/net/gro.h:523 [inline]
 gro_normal_one include/net/gro.h:543 [inline]
 gro_skb_finish net/core/gro.c:617 [inline]
 gro_receive_skb+0x5fb/0xc30 net/core/gro.c:647
 napi_gro_receive include/linux/netdevice.h:4349 [inline]
 gro_cell_poll+0x3ca/0x630 net/core/gro_cells.c:71
 __napi_poll+0xaa/0x330 net/core/dev.c:7830
 napi_poll net/core/dev.c:7893 [inline]
 net_rx_action+0x61d/0xf50 net/core/dev.c:8050
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__slab_free+0xef/0x2c0 mm/slub.c:5769
Code: f3 0f 84 e8 00 00 00 48 89 44 24 50 48 89 54 24 58 f3 90 e9 68 ff ff ff 48 8b 03 48 c1 e8 3a c1 e0 04 4d 8b a4 06 d0 00 00 00 <4c> 89 e7 e8 49 00 bd 09 49 89 c0 4c 8b 3b 41 c1 ef 09 41 83 e7 01
RSP: 0018:ffffc90003bbfb60 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea0000cff540 RCX: ffff888033fd5700
RDX: ffff888033fd5700 RSI: 000000000000003f RDI: ffff88801b041780
RBP: ffffc90003bbfc00 R08: 0000000000000000 R09: ffffffff8237f24e
R10: dffffc0000000000 R11: fffffbfff20f4c10 R12: ffff88801b040480
R13: 0000000000000000 R14: ffff88801b041780 R15: 0000000000000000
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:406
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x321/0x600 mm/slub.c:5563
 _kmalloc_noprof include/linux/slab.h:991 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 alloc_pipe_info+0xe8/0x4c0 fs/pipe.c:883
 get_pipe_inode fs/pipe.c:977 [inline]
 create_pipe_files+0x88/0x7c0 fs/pipe.c:1009
 __do_pipe_flags+0x46/0x1f0 fs/pipe.c:1071
 do_pipe2+0xaa/0x190 fs/pipe.c:1119
 __do_sys_pipe2 fs/pipe.c:1137 [inline]
 __se_sys_pipe2 fs/pipe.c:1135 [inline]
 __x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1135
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc865b9d189
Code: 38 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 eb aa e8 ea 34 00 00 66 2e 0f 1f 84 00 00 00 00 00 31 f6 b8 25 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 07 c3 66 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff
RSP: 002b:00007fffa4e06168 EFLAGS: 00000246 ORIG_RAX: 0000000000000125
RAX: ffffffffffffffda RBX: 000055559223d790 RCX: 00007fc865b9d189
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fffa4e06180
RBP: 00007fffa4e06750 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffa4e062b0
R13: 0000555592245020 R14: 000055559223d390 R15: 00007fffa4e062d0
 </TASK>
net_ratelimit: 5441 callbacks suppressed
bridge0: received packet on bridge_slave_1 with own address as source address (addr:4a:da:df:67:e6:11, vlan:0)