bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6037/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=11753, q=740 ncpus=2)
task:syz.3.54 state:R running task stack:26568 pid:6037 ppid:5776 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x15ae/0x4660 kernel/sched/core.c:6701
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6868
preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6892
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1523 [inline]
zap_pmd_range mm/memory.c:1571 [inline]
zap_pud_range mm/memory.c:1600 [inline]
zap_p4d_range mm/memory.c:1621 [inline]
unmap_page_range+0x2577/0x32f0 mm/memory.c:1642
unmap_vmas+0x286/0x3f0 mm/memory.c:1732
exit_mmap+0x238/0xb90 mm/mmap.c:3302
__mmput+0x118/0x3a0 kernel/fork.c:1362
exit_mm+0x23f/0x340 kernel/exit.c:576
do_exit+0x909/0x2530 kernel/exit.c:877
do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
get_signal+0x12a6/0x1390 kernel/signal.c:2915
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
__syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:305
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f85f2f9f349
RSP: 002b:00007ffce0e62708 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3
RAX: fffffffffffffffc RBX: 00007f85f2f5a8e0 RCX: 00007f85f2f9f349
RDX: 00007f85f2f5a8e0 RSI: 0000000000000058 RDI: 00007ffce0e62760
RBP: 00007f85f3e606c0 R08: 00007f85f3e606c0 R09: 00007ffce0e62847
R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffe8
R13: 000000000000000b R14: 00007ffce0e62760 R15: 00007ffce0e62848
rcu: rcu_preempt kthread starved for 5146 jiffies! g11753 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:25960 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x15ae/0x4660 kernel/sched/core.c:6701
schedule+0xbd/0x170 kernel/sched/core.c:6775
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6032 Comm: syz.2.51 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__lock_acquire+0xe5b/0x7eb0 kernel/locking/lockdep.c:5141
Code: 00 00 00 e8 07 ac 00 00 85 c0 0f 84 59 09 00 00 48 c7 c0 80 84 0f 98 48 c1 e8 03 49 b8 00 00 00 00 00 fc ff df 42 0f b6 04 00 <84> c0 0f 85 5e 0e 00 00 83 3d a6 d7 a6 16 00 48 8b 44 24 28 75 3c
RSP: 0018:ffffc900000061c0 EFLAGS: 00000806
RAX: 0000000000000004 RBX: ffff8880299ae650 RCX: ffffffff81695944
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff91ff1500
RBP: ffffc90000006408 R08: dffffc0000000000 R09: 1ffffffff23fe2a0
R10: dffffc0000000000 R11: fffffbfff23fe2a1 R12: 0000000000000002
R13: ffff8880299ada00 R14: ffffffff9195e90a R15: ffff8880299ae670
FS: 00007faf74dfa6c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f139c9d5d58 CR3: 000000002f570000 CR4: 00000000003506f0
Call Trace:
lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5790
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xb4/0x100 kernel/locking/spinlock.c:162
debug_object_activate+0x6c/0x500 lib/debugobjects.c:747
debug_hrtimer_activate kernel/time/hrtimer.c:450 [inline]
debug_activate kernel/time/hrtimer.c:504 [inline]
enqueue_hrtimer+0x34/0x380 kernel/time/hrtimer.c:1100
__run_hrtimer kernel/time/hrtimer.c:1771 [inline]
__hrtimer_run_queues+0x62f/0xc10 kernel/time/hrtimer.c:1818
hrtimer_interrupt+0x39d/0x980 kernel/time/hrtimer.c:1880
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__is_kernel_text include/asm-generic/sections.h:208 [inline]
RIP: 0010:is_kernel_text include/linux/kallsyms.h:29 [inline]
RIP: 0010:core_kernel_text kernel/extable.c:68 [inline]
RIP: 0010:kernel_text_address+0x5/0xd0 kernel/extable.c:99
Code: 00 00 48 81 fb 00 00 c0 90 0f 93 c1 48 81 fb ab d2 d6 90 0f 92 c2 20 ca 08 c2 0f b6 c2 5b c3 66 0f 1f 44 00 00 66 0f 1f 00 55 <41> 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff 00 00 c0 8a 0f 92
RSP: 0018:ffffc90000006a00 EFLAGS: 00000246
RAX: ffffffff813bb267 RBX: ffffffff8a930314 RCX: 0000000000000100
RDX: ffff8880299ada00 RSI: 0000000000000002 RDI: ffffffff8a930314
RBP: 0000000000000002 R08: ffff8880299ada00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8152e829
R13: ffffc90000006e60 R14: dffffc0000000000 R15: 1ffff92000000d52
__kernel_text_address+0xd/0x30 kernel/extable.c:79
unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x290 mm/slub.c:3852
kfree_skb include/linux/skbuff.h:1264 [inline]
ip6_mc_input+0xa17/0xc10 net/ipv6/ip6_input.c:589
ip_sabotage_in+0x1e2/0x270 net/bridge/br_netfilter_hooks.c:1005
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x21d/0x3b0 include/linux/netfilter.h:302
__netif_receive_skb_one_core net/core/dev.c:5671 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5785
netif_receive_skb_internal net/core/dev.c:5871 [inline]
netif_receive_skb+0x1bc/0x720 net/core/dev.c:5930
NF_HOOK+0x9e/0x3a0 include/linux/netfilter.h:304
br_handle_frame_finish+0xf51/0x15c0 net/bridge/br_input.c:221
br_nf_hook_thresh+0x3cd/0x4a0 net/bridge/br_netfilter_hooks.c:1188
br_nf_pre_routing_finish_ipv6+0x9e5/0xd20 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:304 [inline]
br_nf_pre_routing_ipv6+0x34d/0x6a0 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x1240/0x14d0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xf94/0x3ac0 net/core/dev.c:5565
__netif_receive_skb_one_core net/core/dev.c:5669 [inline]
__netif_receive_skb+0x74/0x290 net/core/dev.c:5785
process_backlog+0x380/0x710 net/core/dev.c:6113
__napi_poll+0xbb/0x460 net/core/dev.c:6675
napi_poll net/core/dev.c:6742 [inline]
net_rx_action+0x65f/0xcc0 net/core/dev.c:6878
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:208
Code: 00 0f 0b 0f 1f 80 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d 7c cc e4 0d 48 89 de 5b e9 73 10 58 00 cc cc cc 0f 1e fa 48 8b 04 24 65 48 8b 0d 40 27 7c 7e 65 8b 15 41 27 7c
RSP: 0018:ffffc90005267510 EFLAGS: 00000246
RAX: 0000000000000008 RBX: ffffffff908c717c RCX: 0000000000000003
RDX: ffffffff813bbb18 RSI: ffffffff8dda0900 RDI: 0000000000000004
RBP: ffffc90005267638 R08: ffff8880299ada00 R09: 0000000000000008
R10: 0000000000000009 R11: 0000000000000002 R12: ffffffff908c7180
R13: ffffc900052675e8 R14: 0000000000000004 R15: dffffc0000000000
unwind_next_frame+0x9b6/0x2990 arch/x86/kernel/unwind_orc.c:521
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
save_stack+0x125/0x230 mm/page_owner.c:128
__reset_page_owner+0x4e/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1182 [inline]
free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
__slab_free+0x35a/0x400 mm/slub.c:3736
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:770
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x17e/0x2c0 mm/slub.c:3519
radix_tree_node_alloc+0x7e/0x3a0 lib/radix-tree.c:276
idr_get_free+0x28f/0xa10 lib/radix-tree.c:1506
idr_alloc_u32 lib/idr.c:48 [inline]
idr_alloc+0x19d/0x2e0 lib/idr.c:89
unit_set drivers/net/ppp/ppp_generic.c:3628 [inline]
ppp_unit_register drivers/net/ppp/ppp_generic.c:1210 [inline]
ppp_dev_configure+0x77a/0xad0 drivers/net/ppp/ppp_generic.c:1280
ppp_create_interface drivers/net/ppp/ppp_generic.c:3378 [inline]
ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1065 [inline]
ppp_ioctl+0xafb/0x1bc0 drivers/net/ppp/ppp_generic.c:731
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faf73f9e559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faf74dfa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007faf74225fa0 RCX: 00007faf73f9e559
RDX: 000000110e22fff6 RSI: 00000000c004743e RDI: 0000000000000008
RBP: 00007faf740358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faf74226038 R14: 00007faf74225fa0 R15: 00007fff5c06e0e8
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
net_ratelimit: 2846 callbacks suppressed
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)
bridge0: received packet on team0 with own address as source address (addr:aa:aa:aa:aa:aa:20, vlan:0)