syzbot

bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:70:dd:76:21:ab, vlan:1)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5609/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=79873, q=1080 ncpus=2)
task:syz-executor    state:R  running task     stack:22104 pid:5609  tgid:5609  ppid:5608   task_flags:0x400100 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:118 [inline]
RIP: 0010:lock_acquire+0x84/0x350 kernel/locking/lockdep.c:5844
Code: e8 f1 29 09 00 84 c0 0f 84 ca 01 00 00 83 3d d2 7e b5 0e 00 0f 84 d3 00 00 00 48 8b b4 24 90 00 00 00 4c 89 ef e8 5c ae 91 00 <83> 3d b5 7e b5 0e 00 0f 84 ce 00 00 00 65 8b 05 98 90 ca 11 85 c0
RSP: 0018:ffffc90003a1f700 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8176f29c RDI: 1ffffffff1d6b38c
RBP: ffffffff8176f27f R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90003a1f898 R11: ffffffff81b16a10 R12: 0000000000000002
R13: ffffffff8eb59c60 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 rcu_read_lock include/linux/rcupdate.h:840 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
 unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 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:1406 [inline]
 __free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950
 __slab_free+0x274/0x2c0 mm/slub.c:5767
 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:4612 [inline]
 slab_alloc_node mm/slub.c:4945 [inline]
 __do_kmalloc_node mm/slub.c:5361 [inline]
 __kmalloc_noprof+0x311/0x720 mm/slub.c:5387
 _kmalloc_noprof include/linux/slab.h:973 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 alloc_pipe_info+0x1f9/0x4c0 fs/pipe.c:915
 get_pipe_inode fs/pipe.c:994 [inline]
 create_pipe_files+0x88/0x7c0 fs/pipe.c:1026
 __do_pipe_flags+0x46/0x1f0 fs/pipe.c:1088
 do_pipe2+0xaa/0x190 fs/pipe.c:1136
 __do_sys_pipe2 fs/pipe.c:1154 [inline]
 __se_sys_pipe2 fs/pipe.c:1152 [inline]
 __x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1152
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2cbc99ce89
RSP: 002b:00007ffc6ffe14d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000125
RAX: ffffffffffffffda RBX: 000055556eef0300 RCX: 00007f2cbc99ce89
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 00007ffc6ffe14e8
RBP: 00007ffc6ffe1ab0 R08: 0000000000000610 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc6ffe1610
R13: 000055556ef5b300 R14: 000055556eef02b8 R15: 00007ffc6ffe1630
 </TASK>
rcu: rcu_preempt kthread starved for 8489 jiffies! g79873 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26848 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7413
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
 _raw_spin_unlock_irqrestore+0x74/0x80 kernel/locking/spinlock.c:198
 timer_init_key_on_stack+0x3c/0x110 kernel/time/timer.c:816
 schedule_timeout+0x140/0x2c0 kernel/time/sleep_timeout.c:96
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
 kthread+0x388/0x470 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__rmqueue_pcplist+0xdc/0x1b90 mm/page_alloc.c:3319
Code: 00 00 00 45 08 c3 44 88 5c 24 17 45 08 ca 44 88 54 24 16 41 b9 01 00 00 00 41 d3 e1 45 31 c0 45 85 c9 45 0f 4e c8 89 54 24 04 <4c> 63 d2 4d 89 d0 49 c1 e0 04 89 34 24 89 f2 48 89 54 24 50 48 6b
RSP: 0018:ffffc90000006d30 EFLAGS: 00000202
RAX: ffff8880b8641301 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88823fff8140
RBP: ffff88813fffd978 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000001 R11: ffff8880b8641300 R12: ffff8880b86413e0
R13: ffff8880b86413c0 R14: ffffffff8e4f77d0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124f59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cb8400218 CR3: 000000007ef50000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rmqueue_pcplist mm/page_alloc.c:3379 [inline]
 rmqueue mm/page_alloc.c:3409 [inline]
 get_page_from_freelist+0x701/0x2270 mm/page_alloc.c:3943
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304
 alloc_slab_page mm/slub.c:3294 [inline]
 allocate_slab+0x79/0x5e0 mm/slub.c:3408
 new_slab mm/slub.c:3454 [inline]
 refill_objects+0x2d5/0x350 mm/slub.c:7338
 refill_sheaf mm/slub.c:2832 [inline]
 __pcs_replace_empty_main+0x2bf/0x6b0 mm/slub.c:4703
 alloc_from_pcs mm/slub.c:4801 [inline]
 slab_alloc_node mm/slub.c:4933 [inline]
 kmem_cache_alloc_noprof+0x382/0x5f0 mm/slub.c:4959
 skb_clone+0x212/0x3a0 net/core/skbuff.c:2110
 deliver_clone net/bridge/br_forward.c:125 [inline]
 maybe_deliver net/bridge/br_forward.c:191 [inline]
 br_flood+0x3c3/0x8d0 net/bridge/br_forward.c:245
 br_handle_frame_finish+0x1175/0x1990 net/bridge/br_input.c:229
 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:318 [inline]
 br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
 br_handle_frame+0x127f/0x1510 net/bridge/br_input.c:442
 __netif_receive_skb_core+0x989/0x30b0 net/core/dev.c:6093
 __netif_receive_skb_one_core net/core/dev.c:6204 [inline]
 __netif_receive_skb net/core/dev.c:6319 [inline]
 process_backlog+0x706/0x1860 net/core/dev.c:6670
 __napi_poll+0xaa/0x330 net/core/dev.c:7729
 napi_poll net/core/dev.c:7792 [inline]
 net_rx_action+0x61d/0xf50 net/core/dev.c:7949
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 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:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: dc 80 02 e9 13 05 03 00 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 ca 1a 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8e807de0 EFLAGS: 00000242
RAX: 00000000012b3101 RBX: ffffffff819ab33c RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8e229c3f RDI: ffffffff8c4bd380
RBP: ffffffff8e807eb8 R08: ffff8880b86338db R09: 1ffff110170c671b
R10: dffffc0000000000 R11: ffffed10170c671c R12: 0000000000000000
R13: 1ffffffff1d11de8 R14: 1ffffffff1d00fc4 R15: dffffc0000000000
 arch_safe_halt arch/x86/kernel/process.c:767 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:768
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x1cc/0x540 kernel/sched/idle.c:355
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
 rest_init+0x2de/0x300 init/main.c:717
 start_kernel+0x392/0x3e0 init/main.c:1175
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x157
 </TASK>
net_ratelimit: 5543 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:70:dd:76:21:ab, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:70:dd:76:21:ab, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
net_ratelimit: 5996 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:70:dd:76:21:ab, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1)
bridge0: received packet on 
1�x9� with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:1)