bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P13017/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=69477, q=11912 ncpus=2)
task:syz.0.1667 state:R running task stack:20736 pid:13017 tgid:13017 ppid:5842 task_flags:0x40064c flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7238
irqentry_exit+0x599/0x620 kernel/entry/common.c:239
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:deref_stack_reg+0x0/0x230 arch/x86/kernel/unwind_orc.c:418
Code: ff ff 48 89 4c 24 18 e8 6e 46 b9 00 48 8b 4c 24 18 e9 f2 fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 54 24 18 49 89 f0
RSP: 0018:ffffc9000f426cd0 EFLAGS: 00000283
RAX: fffffffffffffff0 RBX: ffffffff90b5f690 RCX: 0000000000000000
RDX: ffffc9000f426de8 RSI: ffffc9000f427920 RDI: ffffc9000f426da8
RBP: dffffc0000000000 R08: ffffc9000f426e07 R09: 0000000000000000
R10: ffffc9000f426df8 R11: fffff52001e84dc1 R12: ffffc9000f426df8
R13: 1ffff92001e84db7 R14: ffffc9000f426da8 R15: 1ffffffff216bed2
unwind_next_frame+0x18c6/0x23c0 arch/x86/kernel/unwind_orc.c:-1
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:1433 [inline]
free_unref_folios+0xed5/0x16d0 mm/page_alloc.c:3040
folios_put_refs+0x789/0x8d0 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x52c/0x1660 mm/shmem.c:1149
shmem_truncate_range mm/shmem.c:1277 [inline]
shmem_evict_inode+0x240/0x9e0 mm/shmem.c:1407
evict+0x61e/0xb10 fs/inode.c:846
__dentry_kill+0x1a2/0x5e0 fs/dcache.c:670
finish_dput+0xc9/0x480 fs/dcache.c:879
__fput+0x691/0xa70 fs/file_table.c:477
task_work_run+0x1d9/0x270 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x70f/0x23c0 kernel/exit.c:976
do_group_exit+0x21b/0x2d0 kernel/exit.c:1118
get_signal+0x1284/0x1330 kernel/signal.c:3034
arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
irqentry_exit+0x176/0x620 kernel/entry/common.c:219
exc_general_protection+0x169/0x1f0 arch/x86/kernel/traps.c:913
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:612
RIP: 0033:0x7f0f1fd9c7a1
RSP: 002b:00002000000003a0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0f20015fa0 RCX: 00007f0f1fd9c799
RDX: 00002000000003c0 RSI: 00002000000003a0 RDI: 0000000000004000
RBP: 00007f0f1fe32c99 R08: 0000200000000440 R09: 0000200000000440
R10: 0000200000000400 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f0f20016038 R14: 00007f0f20015fa0 R15: 00007f0f2013fa48
rcu: rcu_preempt kthread starved for 501 jiffies! g69477 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:27648 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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: 14 Comm: kworker/R-mm_pe Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: mm_percpu_wq vmstat_update
RIP: 0010:lock_is_held_type+0x45/0x150 kernel/locking/lockdep.c:-1
Code: 84 e4 00 00 00 65 8b 05 c9 b0 6d 07 85 c0 0f 85 d5 00 00 00 65 4c 8b 2d 11 6b 6d 07 41 83 bd 54 0b 00 00 00 0f 85 bf 00 00 00 <89> f5 49 89 fe 9c 41 5c fa 48 c7 c7 15 22 f1 8d e8 a6 18 00 00 65
RSP: 0018:ffffc90000006888 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000080000103
RDX: ffff88801d68bd00 RSI: 00000000ffffffff RDI: ffffffff8e75e5e0
RBP: ffffc90000006a18 R08: ffffc90000006b40 R09: ffffc90000006b50
R10: ffffc900000069a0 R11: fffff52000000d36 R12: 1ffff1100ab5538c
R13: ffff88801d68bd00 R14: ffff888079c70c00 R15: ffffc90000006b18
FS: 0000000000000000(0000) GS:ffff88812545d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8be2000218 CR3: 000000007ca2e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000009951
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__find_rr_leaf+0x353/0x760 net/ipv6/route.c:833
find_rr_leaf net/ipv6/route.c:889 [inline]
rt6_select net/ipv6/route.c:933 [inline]
fib6_table_lookup+0x3b4/0xa80 net/ipv6/route.c:2247
ip6_pol_route+0x228/0x13d0 net/ipv6/route.c:2283
pol_lookup_func include/net/ip6_fib.h:617 [inline]
fib6_rule_lookup+0x556/0x730 net/ipv6/fib6_rules.c:120
ip6_route_input_lookup net/ipv6/route.c:2352 [inline]
ip6_route_input+0x730/0xad0 net/ipv6/route.c:2655
ip6_rcv_finish+0x141/0x280 net/ipv6/ip6_input.c:77
ip_sabotage_in+0x1e1/0x270 net/bridge/br_netfilter_hooks.c:990
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:623
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:316
__netif_receive_skb_one_core net/core/dev.c:6164 [inline]
__netif_receive_skb net/core/dev.c:6277 [inline]
netif_receive_skb_internal net/core/dev.c:6363 [inline]
netif_receive_skb+0x278/0xc50 net/core/dev.c:6422
NF_HOOK+0xa4/0x3a0 include/linux/netfilter.h:318
br_handle_frame_finish+0x14e2/0x1bb0 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+0xa3a/0xd70 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x374/0x6f0 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x1277/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x98f/0x31a0 net/core/dev.c:6051
__netif_receive_skb_one_core net/core/dev.c:6162 [inline]
__netif_receive_skb net/core/dev.c:6277 [inline]
process_backlog+0x76d/0x1950 net/core/dev.c:6628
__napi_poll+0xae/0x340 net/core/dev.c:7692
napi_poll net/core/dev.c:7755 [inline]
net_rx_action+0x627/0xf70 net/core/dev.c:7912
handle_softirqs+0x22a/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194
Code: f7 e8 1d d1 f0 f5 f7 c3 00 02 00 00 74 05 e8 d0 2a 1c f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 e4 8d e2 f5 65 8b 05 0d d0 6a 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc900001378a0 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000212 RCX: 0000000080000002
RDX: 0000000000000006 RSI: ffffffff8def8bf9 RDI: 0000000000000001
RBP: 000000000000003f R08: ffffffff9011b3b7 R09: 1ffffffff2023676
R10: dffffc0000000000 R11: fffffbfff2023677 R12: 0000000000000280
R13: 000000000000003f R14: ffff88813fffc180 R15: 1ffff110170c8188
decay_pcp_high+0x118/0x290 mm/page_alloc.c:2612
refresh_cpu_vm_stats+0x1e9/0x440 mm/vmstat.c:830
vmstat_update+0x15/0xb0 mm/vmstat.c:2036
process_one_work kernel/workqueue.c:3276 [inline]
process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359
rescuer_thread+0x827/0x1130 kernel/workqueue.c:3583
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
net_ratelimit: 18171 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on bridge0!
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on bridge0!
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on bridge0!
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
net_ratelimit: 22929 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on bridge0!
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on bridge0!
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)