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 bridge_slave_1 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): P9698/1:b..l
rcu: (detected by 0, t=10709 jiffies, g=35165, q=1342 ncpus=2)
task:syz.2.977 state:R running task stack:25608 pid:9698 tgid:9698 ppid:5614 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x17db/0x58f0 kernel/sched/core.c:7284
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7463
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0xe9/0x140 kernel/softirq.c:480
spin_unlock_bh include/linux/spinlock.h:407 [inline]
__fib6_clean_all+0x4a3/0x5d0 net/ipv6/ip6_fib.c:2326
rt6_sync_down_dev net/ipv6/route.c:5004 [inline]
rt6_disable_ip+0x149/0x7e0 net/ipv6/route.c:5011
addrconf_ifdown+0x155/0x1ad0 net/ipv6/addrconf.c:3892
addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1
notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2349 [inline]
call_netdevice_notifiers net/core/dev.c:2363 [inline]
unregister_netdevice_many_notify+0x1437/0x1d80 net/core/dev.c:12569
unregister_netdevice_many net/core/dev.c:12640 [inline]
unregister_netdevice_queue+0x2f5/0x340 net/core/dev.c:12436
unregister_netdevice include/linux/netdevice.h:3485 [inline]
__tun_detach+0x1074/0x1900 drivers/net/tun.c:637
tun_detach drivers/net/tun.c:653 [inline]
tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3587
__fput+0x418/0xa50 fs/file_table.c:512
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce58b9e159
RSP: 002b:00007ffcc57549e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fce58e27da0 RCX: 00007fce58b9e159
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fce58e27da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007fce58e27cb0 R11: 0000000000000246 R12: 000000000002eda3
R13: 00007fce58e2609c R14: 000000000002eb42 R15: 00007fce58e26090
rcu: rcu_preempt kthread starved for 6715 jiffies! g35165 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:27752 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: 4985 Comm: udevd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:match_held_lock+0xe1/0x120 kernel/locking/lockdep.c:5388
Code: e1 ff 1f 00 00 48 c7 c2 d0 d4 3a 94 48 29 d0 48 c1 f8 03 49 0f af c6 bb 01 00 00 00 48 39 c1 74 02 31 db 89 d8 5b 41 5e 41 5f da fe 02 00 cc b1 01 84 c9 0f 84 5e ff ff ff eb 98 90 e8 a7 69
RSP: 0018:ffffc90000a176a0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88807ea24a30 RCX: 8000000000000301
RDX: 8000000000000300 RSI: ffffffff8ed5c920 RDI: ffff88807ea24a30
RBP: 00000000ffffffff R08: 0000000000000100 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff8aad2d70 R12: 0000000000000246
R13: ffff88807ea23e80 R14: ffffffff8ed5c920 R15: 0000000000000000
FS: 00007f54c3548880(0000) GS:ffff888124dde000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555e4faa38 CR3: 000000007e99a000 CR4: 00000000003526f0
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5654 [inline]
lock_is_held_type+0x89/0x150 kernel/locking/lockdep.c:6016
run_filter+0x106/0x270 net/packet/af_packet.c:2101
packet_rcv+0x49a/0x16f0 net/packet/af_packet.c:2176
dev_queue_xmit_nit+0xa2c/0xac0 net/core/dev.c:2668
xmit_one net/core/dev.c:3969 [inline]
dev_hard_start_xmit+0x1c1/0x830 net/core/dev.c:3989
__dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4962
dev_queue_xmit include/linux/netdevice.h:3459 [inline]
br_dev_queue_push_xmit+0x370/0x4b0 net/bridge/br_forward.c:67
NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325
br_nf_post_routing+0xa51/0xee0 net/bridge/br_netfilter_hooks.c:964
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:80
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1165 [inline]
br_nf_forward_finish+0xa76/0xea0 net/bridge/br_netfilter_hooks.c:667
NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325
br_nf_forward_ip+0x7e7/0xa30 net/bridge/br_netfilter_hooks.c:721
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323
__br_forward+0x41e/0x5d0 net/bridge/br_forward.c:130
br_flood+0x402/0x650 net/bridge/br_forward.c:350
br_handle_frame_finish+0x1119/0x1950 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: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:6188
__netif_receive_skb_one_core net/core/dev.c:6299 [inline]
__netif_receive_skb net/core/dev.c:6414 [inline]
process_backlog+0x727/0x18b0 net/core/dev.c:6765
__napi_poll+0xaa/0x330 net/core/dev.c:7834
napi_poll net/core/dev.c:7897 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8054
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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221
Code: f7 e8 4d d1 bb f5 f7 c3 00 02 00 00 74 05 e8 f0 1b e8 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 b4 de ac f5 65 48 8b 05 ec 10 ac 07 48 85 c0 74 18 5b 41 5e c3
RSP: 0018:ffffc90002f17b90 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000296 RCX: 8000000000000001
RDX: 0000000000000007 RSI: ffffffff8e403b81 RDI: 0000000000000001
RBP: ffff8880a85f2080 R08: ffffffff90799b7f R09: 1ffffffff20f336f
R10: dffffc0000000000 R11: fffffbfff20f3370 R12: ffffffff8c0e4390
R13: ffff8880a85f2070 R14: ffffffff9ac9b150 R15: 1ffff110150be410
debug_object_activate+0x2ec/0x420 lib/debugobjects.c:891
debug_rcu_head_queue kernel/rcu/rcu.h:245 [inline]
__call_rcu_common kernel/rcu/tree.c:3166 [inline]
call_rcu+0x43/0x8b0 kernel/rcu/tree.c:3301
__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]
kmem_cache_alloc_noprof+0x2b9/0x600 mm/slub.c:5010
alloc_filename fs/namei.c:147 [inline]
do_getname+0x2e/0x250 fs/namei.c:187
getname_flags fs/namei.c:230 [inline]
getname include/linux/fs.h:2557 [inline]
class_filename_constructor include/linux/fs.h:2584 [inline]
__do_sys_unlink fs/namei.c:5753 [inline]
__se_sys_unlink+0x1e/0x140 fs/namei.c:5751
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: 0033:0x7f54c2f15937
Code: 00 00 e9 a9 fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 5f 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 91 b4 0d 00 f7 d8 64 89 02 b8
RSP: 002b:00007ffd3e998898 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f54c2f15937
RDX: ffffffffffffffff RSI: 00007ffd3e998980 RDI: 0000556f8b0a402e
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000556fbbb0c4a0
R13: 0000556f8b0bf100 R14: 0000556f8b0a4008 R15: 0000000000000000