bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5731/1:b..l
rcu: (detected by 0, t=10707 jiffies, g=182281, q=1461 ncpus=2)
task:kworker/1:5 state:R running task stack:23560 pid:5731 tgid:5731 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events ovs_dp_masks_rebalance
Call Trace:
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:check_kcov_mode kernel/kcov.c:190 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:242 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x52/0xa0 kernel/kcov.c:317
Code: 00 0f 41 81 f8 00 01 00 00 41 0f 95 c0 81 fa 00 00 00 10 0f 93 c2 44 08 c2 75 57 83 b9 44 17 00 00 00 74 4e 8b 91 18 17 00 00 <83> fa 03 75 43 48 8b 91 20 17 00 00 44 8b 89 1c 17 00 00 49 c1 e1
RSP: 0018:ffffc90004faf748 EFLAGS: 00000246
RAX: ffffffff8243c5b1 RBX: ffffffff8243c3f2 RCX: ffff88802884be80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8243c3f2 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff940001a7507 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000034ea0 R15: ffff88801bd00000
page_ext_invalid mm/page_ext.c:244 [inline]
lookup_page_ext mm/page_ext.c:260 [inline]
page_ext_get+0x1e1/0x2e0 mm/page_ext.c:523
__reset_page_owner+0x28/0x1f0 mm/page_owner.c:324
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:361
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]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_noprof+0x307/0x720 mm/slub.c:5439
_kmalloc_noprof include/linux/slab.h:995 [inline]
ovs_flow_masks_rebalance+0xf4/0xc70 net/openvswitch/flow_table.c:1114
ovs_dp_masks_rebalance+0x56/0xe0 net/openvswitch/datapath.c:2605
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
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
rcu: rcu_preempt kthread starved for 8573 jiffies! g182281 f0x0 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:27656 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
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
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: 29151 Comm: kworker/u8:30 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40 kernel/rcu/update.c:319
Code: 48 8d 3d a3 b9 96 04 48 c7 c6 5d d6 3f 8e 67 48 0f b9 3a 90 eb bc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 31 c0 83 3d 3b 7a 93 04 00 74 1d 83 3d 0a aa 93 04 00
RSP: 0018:ffffc90000a18288 EFLAGS: 00000202
RAX: ffffffff89b050e3 RBX: 0000000000000000 RCX: ffff8880783cddc0
RDX: 8000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000a188b8 R08: 0000000000000100 R09: 0000000000000000
R10: ffffc90000a189c0 R11: fffff52000143142 R12: ffff888028c2a7c0
R13: 1ffffffff20f5b3b R14: 0000000000000001 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888124dc7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f99a73556c8 CR3: 000000000eb48000 CR4: 00000000003526f0
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:105 [inline]
rcu_read_lock_held+0xa/0x50 kernel/rcu/update.c:349
__skb_flow_dissect+0x511/0x6d50 net/core/flow_dissector.c:1136
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
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:325
__netif_receive_skb_one_core net/core/dev.c:6297 [inline]
__netif_receive_skb net/core/dev.c:6410 [inline]
process_backlog+0x795/0x18b0 net/core/dev.c:6761
__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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:csd_lock_wait kernel/smp.c:363 [inline]
RIP: 0010:smp_call_function_many_cond+0x1132/0x1500 kernel/smp.c:1002
Code: 78 44 8b 2b 44 89 ee 83 e6 01 31 ff e8 f7 4d 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 e2 48 0c 00 eb 35 f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 c8 48 0c 00
RSP: 0018:ffffc900037bf720 EFLAGS: 00000293
RAX: ffffffff81bba548 RBX: ffff8880b8643708 RCX: ffff8880783cddc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900037bf870 R08: ffffffff907a647f R09: 1ffffffff20f4c8f
R10: dffffc0000000000 R11: fffffbfff20f4c90 R12: 1ffff110170c86e1
R13: dffffc0000000000 R14: 1ffff1100f079e6b R15: 0000000000000000
on_each_cpu include/linux/smp.h:71 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2641 [inline]
smp_text_poke_batch_finish+0x5fd/0x1110 arch/x86/kernel/alternative.c:2851
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:902
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
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