bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4a:73:70:62:47, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5916/1:b..l P5810/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=19725, q=813 ncpus=2)
task:syz-executor state:R running task stack:23096 pid:5810 tgid:5810 ppid:5802 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x60e0 kernel/sched/core.c:6907
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7234
irqentry_exit+0x17b/0x670 kernel/entry/common.c:239
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5872
Code: 05 7b 97 28 12 83 f8 07 0f 87 f0 00 00 00 48 0f a3 05 46 99 f4 0e 0f 82 c2 02 00 00 8b 35 2e cd f4 0e 85 f6 0f 85 dd 00 00 00 <48> 8b 44 24 30 65 48 2b 05 1d 97 28 12 0f 85 02 03 00 00 48 83 c4
RSP: 0018:ffffc90003e873d8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8de4ba5b RDI: ffffffff8c1aefa0
RBP: ffffffff8e7e93e0 R08: 000000001b7cfd63 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
rcu_read_lock include/linux/rcupdate.h:850 [inline]
class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
unwind_next_frame+0xd1/0x1ea0 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:165
__reset_page_owner+0x84/0x190 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x47/0xe0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:406
kmalloc_node_noprof include/linux/slab.h:1093 [inline]
__get_vm_area_node+0x101/0x330 mm/vmalloc.c:3221
__vmalloc_node_range_noprof+0x213/0x1530 mm/vmalloc.c:4024
__vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4124
xt_counters_alloc+0x4c/0x70 net/netfilter/x_tables.c:1381
__do_replace+0x97/0x980 net/ipv4/netfilter/ip_tables.c:1046
do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline]
do_ipt_set_ctl+0x912/0xb90 net/ipv4/netfilter/ip_tables.c:1635
nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101
ip_setsockopt+0xcb/0xf0 net/ipv4/ip_sockglue.c:1424
tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4217
do_sock_setsockopt+0xf3/0x1d0 net/socket.c:2322
__sys_setsockopt+0x195/0x220 net/socket.c:2347
__do_sys_setsockopt net/socket.c:2353 [inline]
__se_sys_setsockopt net/socket.c:2350 [inline]
__x64_sys_setsockopt+0xbd/0x160 net/socket.c:2350
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf59b9de9a
RSP: 002b:00007fff20f3ea18 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fff20f3eaa0 RCX: 00007fbf59b9de9a
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00000000000002d8 R09: 0000000000000000
R10: 00007fbf59deab20 R11: 0000000000000206 R12: 00007fbf59deaac0
R13: 00007fff20f3ea3c R14: 0000000000000000 R15: 00007fbf59deb180
task:kworker/1:7 state:R running task stack:24024 pid:5916 tgid:5916 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x60e0 kernel/sched/core.c:6907
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7234
irqentry_exit+0x17b/0x670 kernel/entry/common.c:239
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:228 [inline]
RIP: 0010:nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:343 [inline]
RIP: 0010:gc_worker+0x2bb/0x1630 net/netfilter/nf_conntrack_core.c:1548
Code: 00 00 48 c7 c7 68 16 da 90 e8 c1 ed 37 f8 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 4f b5 5b f8 58 48 85 db 0f 85 97 0f 00 00 60 ba 5b f8 8b 1d fa 35 2d 07 89 dd 31 ff 83 e5 01 89 ee e8 fc
RSP: 0018:ffffc900044c7b48 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff89aceaf6
RDX: ffff88802d770000 RSI: ffffffff89aceb05 RDI: ffff88802d770000
RBP: 0000000000032b8b R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000040000 R14: 00000000000195c6 R15: 0000000000001770
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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 664 jiffies! g19725 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:28904 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x60e0 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7004
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 5179 Comm: udevd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:451 [inline]
RIP: 0010:__lock_acquire+0x568/0x2630 kernel/locking/lockdep.c:5225
Code: c7 01 d0 c1 c6 06 31 fe 89 f7 29 f2 01 c6 c1 c7 08 31 d7 89 fa 29 f8 01 f7 c1 c2 10 41 89 f8 31 c2 89 d0 29 d6 01 fa c1 c8 0d <31> c6 89 f0 41 29 f0 01 f2 c1 c0 04 89 d2 44 31 c0 48 c1 e0 20 48
RSP: 0000:ffffc90000006690 EFLAGS: 00000882
RAX: 000000005aeaf16f RBX: ffff888042eb5508 RCX: 0000000000000006
RDX: 00000000dd4dd86d RSI: 000000007f45ee1d RDI: 000000007f1fed10
RBP: ffff888042eb4900 R08: 000000007f1fed10 R09: 0000000000000007
R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000007 R14: 0000000000000006 R15: 0000000000000003
FS: 00007fd024b81880(0000) GS:ffff88812434a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a086ed7b60 CR3: 0000000029aa3000 CR4: 00000000003526f0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x1cf/0x380 kernel/locking/lockdep.c:5825
rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
rcu_read_lock include/linux/rcupdate.h:850 [inline]
class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
unwind_next_frame+0xd1/0x1ea0 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x3d1/0x7f0 arch/x86/kernel/unwind_orc.c:773
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2687 [inline]
slab_free mm/slub.c:6124 [inline]
kmem_cache_free+0x124/0x6a0 mm/slub.c:6254
__skb_ext_put+0x102/0x2f0 net/core/skbuff.c:7239
__skb_ext_del+0xf8/0x380 net/core/skbuff.c:7206
skb_ext_del include/linux/skbuff.h:5073 [inline]
nf_bridge_info_free net/bridge/br_netfilter_hooks.c:156 [inline]
br_nf_dev_queue_xmit+0x7ab/0x2a20 net/bridge/br_netfilter_hooks.c:919
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
br_nf_post_routing+0xcbb/0x16a0 net/bridge/br_netfilter_hooks.c:966
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xbf/0x220 net/netfilter/core.c:623
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK include/linux/netfilter.h:316 [inline]
br_forward_finish+0x261/0x4d0 net/bridge/br_forward.c:66
br_nf_hook_thresh+0x30d/0x420 net/bridge/br_netfilter_hooks.c:1167
br_nf_forward_finish+0x693/0xb30 net/bridge/br_netfilter_hooks.c:662
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
br_nf_forward_ip.part.0+0x61e/0x820 net/bridge/br_netfilter_hooks.c:716
br_nf_forward_ip net/bridge/br_netfilter_hooks.c:676 [inline]
br_nf_forward+0xfe5/0x19f0 net/bridge/br_netfilter_hooks.c:773
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xbf/0x220 net/netfilter/core.c:623
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK include/linux/netfilter.h:316 [inline]
__br_forward+0x2f6/0x970 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0xf0/0x180 net/bridge/br_forward.c:191
br_flood+0x193/0x650 net/bridge/br_forward.c:238
br_handle_frame_finish+0xf57/0x1f00 net/bridge/br_input.c:229
br_nf_hook_thresh+0x30d/0x420 net/bridge/br_netfilter_hooks.c:1167
br_nf_pre_routing_finish_ipv6+0x769/0xfb0 net/bridge/br_netfilter_ipv6.c:154
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x39c/0x8b0 net/bridge/br_netfilter_ipv6.c:184
br_nf_pre_routing+0x93b/0x1510 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0xcdd/0x1520 net/bridge/br_input.c:442
__netif_receive_skb_core.constprop.0+0x6c5/0x3550 net/core/dev.c:6036
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6147
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6262
process_backlog+0x37a/0x1580 net/core/dev.c:6614
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7678
napi_poll net/core/dev.c:7741 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:7893
handle_softirqs+0x1eb/0x9e0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xef/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+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0x583/0x1500 kernel/smp.c:877
Code: 00 fc ff df 48 8b 54 24 10 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 e4 5a 0c 00 f3 90 41 0f b6 45 00 <41> 38 c4 7c 08 84 c0 0f 85 91 0d 00 00 8b 45 08 31 ff 83 e0 01 41
RSP: 0000:ffffc90003f3f898 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81fc4002
RDX: ffff888042eb4900 RSI: ffffffff81fc3fdc RDI: ffff888042eb4900
RBP: ffff8880b8540d20 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: ffffed10170a81a5 R14: 0000000000000001 R15: ffff8880b843c3c0
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1043
__flush_tlb_multi arch/x86/include/asm/paravirt.h:57 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:1382 [inline]
flush_tlb_mm_range+0x45f/0x1710 arch/x86/mm/tlb.c:1472
flush_tlb_page arch/x86/include/asm/tlbflush.h:323 [inline]
ptep_clear_flush+0x148/0x170 mm/pgtable-generic.c:103
wp_page_copy mm/memory.c:3838 [inline]
do_wp_page+0x1499/0x4f00 mm/memory.c:4233
handle_pte_fault mm/memory.c:6324 [inline]
__handle_mm_fault+0x1ac8/0x2b60 mm/memory.c:6446
handle_mm_fault+0x36d/0xa20 mm/memory.c:6615
do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
handle_page_fault arch/x86/mm/fault.c:1474 [inline]
exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fd0244b5b3b
Code: 04 07 0f 85 a9 00 00 00 f3 0f 6f 47 10 48 8b 57 18 66 48 0f 7e c0 48 3b 78 18 75 7b 48 3b 7a 10 75 75 48 8b 77 10 48 89 50 18 <66> 0f d6 42 10 48 81 f9 ff 03 00 00 76 28 48 8b 57 20 48 85 d2 74
RSP: 002b:00007ffd582209c0 EFLAGS: 00010246
RAX: 00007fd0245f22b0 RBX: 0000000000008040 RCX: 0000000000018101
RDX: 000055a086ed7b50 RSI: 00007fd0245f22b0 RDI: 000055a086ef21d0
RBP: 00007fd0245f1ac0 R08: 00007fd0245f1ac0 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000008030
R13: 000055a086ef21d0 R14: 0000000000018100 R15: 00007fd0245f1b20
net_ratelimit: 21917 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4a:73:70:62:47, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4a:73:70:62:47, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4a:73:70:62:47, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 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:0c, vlan:0)
net_ratelimit: 25138 callbacks suppressed
bridge0: received packet on bridge_slave_0 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:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4a:73:70:62:47, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4a:73:70:62:47, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 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:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4a:73:70:62:47, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)