bridge0: received packet on veth0_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): P6207/1:b..l P6210/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=231205, q=2329 ncpus=2)
task:syz.4.8588 state:R running task stack:21856 pid:6210 tgid:6191 ppid:29432 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7364
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0xe1/0x130 kernel/softirq.c:457
local_bh_enable include/linux/bottom_half.h:33 [inline]
tun_rx_batched+0x617/0x790 drivers/net/tun.c:-1
tun_get_user+0x2aeb/0x3ed0 drivers/net/tun.c:1955
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2001
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f064955d04e
RSP: 002b:00007f06473f3fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f06473f46c0 RCX: 00007f064955d04e
RDX: 000000000000009a RSI: 0000200000000040 RDI: 00000000000000c8
RBP: 00007f0649632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0649816308 R14: 00007f0649816270 R15: 00007ffdd9a1f678
task:syz.4.8588 state:R running task stack:25144 pid:6207 tgid:6191 ppid:29432 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7507
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x730 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:217 [inline]
RIP: 0010:unwind_next_frame+0x1d3/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 8b 27 48 83 f3 01 48 c7 c2 20 a5 c9 8b 49 29 dc 0f 84 b2 02 00 00 49 81 fc 00 00 00 81 0f 92 c0 49 81 fc a8 db b6 8b 0f 93 c1 <08> c1 0f 85 05 01 00 00 48 c7 c0 00 00 00 81 4d 89 e7 49 29 c7 49
RSP: 0018:ffffc90003976a78 EFLAGS: 00000297
RAX: 1ffff9200072ed00 RBX: 0000000000000001 RCX: 0000000080000000
RDX: ffffffff8bc9a520 RSI: ffffffff8c27efe0 RDI: ffffffff8c27efa0
RBP: dffffc0000000000 R08: ffffffff81766536 R09: ffffffff8e95d020
R10: ffffc90003976b98 R11: ffffffff81b0a9b0 R12: ffffffff821f3f17
R13: 1ffff9200072ed69 R14: ffffc90003976b48 R15: ffffc90003976b90
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
__set_page_owner+0x8d/0x4c0 mm/page_owner.c:341
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
prep_new_page mm/page_alloc.c:1897 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
__alloc_pages_noprof mm/page_alloc.c:5284 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5204
___alloc_pages_bulk mm/kasan/shadow.c:345 [inline]
__kasan_populate_vmalloc_do mm/kasan/shadow.c:370 [inline]
__kasan_populate_vmalloc+0xc1/0x1d0 mm/kasan/shadow.c:424
kasan_populate_vmalloc include/linux/kasan.h:580 [inline]
alloc_vmap_area+0xd47/0x1480 mm/vmalloc.c:2129
__get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232
__vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024
__kvmalloc_node_noprof+0x5ba/0x8a0 mm/slub.c:6780
htable_create+0x101/0x7a0 net/netfilter/xt_hashlimit.c:296
hashlimit_mt_check_common+0x719/0xa10 net/netfilter/xt_hashlimit.c:900
xt_check_match+0x4f1/0xc50 net/netfilter/x_tables.c:534
check_match net/ipv6/netfilter/ip6_tables.c:488 [inline]
find_check_match net/ipv6/netfilter/ip6_tables.c:505 [inline]
find_check_entry net/ipv6/netfilter/ip6_tables.c:556 [inline]
translate_table+0x1547/0x20b0 net/ipv6/netfilter/ip6_tables.c:733
do_replace net/ipv6/netfilter/ip6_tables.c:1154 [inline]
do_ip6t_set_ctl+0x9fe/0xe10 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101
do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2381
__sys_setsockopt net/socket.c:2406 [inline]
__do_sys_setsockopt net/socket.c:2412 [inline]
__se_sys_setsockopt net/socket.c:2409 [inline]
__x64_sys_setsockopt+0x13d/0x1b0 net/socket.c:2409
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f064959c819
RSP: 002b:00007f064a374028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f0649816180 RCX: 00007f064959c819
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 000000000000000c
RBP: 00007f0649632c91 R08: 00000000000004f8 R09: 0000000000000000
R10: 0000200000000980 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0649816218 R14: 00007f0649816180 R15: 00007ffdd9a1f678
rcu: rcu_preempt kthread starved for 729 jiffies! g231205 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:27528 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x17b4/0x5680 kernel/sched/core.c:7183
__schedule_loop kernel/sched/core.c:7262 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7277
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+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:
CPU: 0 UID: 0 PID: 33 Comm: kcompactd0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:pie_calculate_probability+0x45d/0x7e0 net/sched/sch_pie.c:-1
Code: 84 e8 74 3f e8 d4 45 0d f8 48 8b 44 24 20 42 80 3c 20 00 74 08 4c 89 f7 e8 f0 12 79 f8 49 8b 1e 48 89 d8 48 c1 e8 06 48 29 c3 <48> 8b 44 24 20 42 80 3c 20 00 74 08 4c 89 f7 e8 bf 13 79 f8 49 89
RSP: 0018:ffffc90000007b68 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888020695c40
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880b392e708 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f70 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff8880b392e720 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125245000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe84a62bc94 CR3: 000000003e5d2000 CR4: 00000000003526f0
Call Trace:
fq_pie_timer+0x288/0x5b0 net/sched/sch_fq_pie.c:402
call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2374 [inline]
__run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
run_timer_base kernel/time/timer.c:2395 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
handle_softirqs+0x22a/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:1061 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
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:198
Code: f7 e8 0d 6c ec f5 f7 c3 00 02 00 00 74 05 e8 10 88 17 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 a4 fd dd f5 65 8b 05 9d 00 88 07 85 c0 74 18 5b 41 5e e9 41 48
RSP: 0018:ffffc90000a979a8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000296 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dfb649f RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff903215b7 R09: 1ffffffff20642b6
R10: dffffc0000000000 R11: fffffbfff20642b7 R12: ffffffff81b28b80
R13: ffffc90000a97a40 R14: ffffffff9a6ef930 R15: ffffc90000a97a40
timer_init_key_on_stack+0x3c/0x110 kernel/time/timer.c:816
schedule_timeout+0x146/0x2c0 kernel/time/sleep_timeout.c:96
kcompactd+0x416/0x12e0 mm/compaction.c:3187
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
net_ratelimit: 2096 callbacks suppressed
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: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:0c, 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:0c, 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:0c, 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:0c, 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: 2616 callbacks suppressed
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: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:0c, 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:0c, 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:0c, 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:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)