bridge0: received packet on bridge_slave_0 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): P20538/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=81465, q=1962 ncpus=2)
task:syz.0.3887 state:R running task stack:25960 pid:20538 tgid:20533 ppid:16217 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x1585/0x5340 kernel/sched/core.c:6907
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234
irqentry_exit+0x599/0x620 kernel/entry/common.c:239
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x30/0x90 kernel/kcov.c:321
Code: 04 24 65 48 8b 0d 88 0e 56 11 65 8b 15 a9 0e 56 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 54 16 00 00 00 74 4e <8b> 91 30 16 00 00 83 fa 03 75 43 48 8b 91 38 16 00 00 44 8b 89 34
RSP: 0018:ffffc90010a5f0d0 EFLAGS: 00000246
RAX: ffffffff823bea9c RBX: 0000000000067fea RCX: ffff888026f2dac0
RDX: 0000000000000000 RSI: 0000000000007fea RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff88801da7f91f R09: 1ffff11003b4ff23
R10: dffffc0000000000 R11: ffffed1003b4ff24 R12: 0000000000000000
R13: 0000000000067fea R14: dffffc0000000000 R15: ffff88801da7f8d0
page_ext_iter_next_fast_possible include/linux/page_ext.h:80 [inline]
page_ext_iter_next include/linux/page_ext.h:156 [inline]
__page_table_check_zero+0x23c/0x3e0 mm/page_table_check.c:139
page_table_check_alloc include/linux/page_table_check.h:38 [inline]
post_alloc_hook+0x240/0x280 mm/page_alloc.c:1890
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_mpol+0x232/0x4a0 mm/mempolicy.c:2485
folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2504
shmem_alloc_folio mm/shmem.c:1930 [inline]
shmem_alloc_and_add_folio+0x445/0xf80 mm/shmem.c:1972
shmem_get_folio_gfp+0x5a9/0x1670 mm/shmem.c:2567
shmem_fault+0x179/0x390 mm/shmem.c:2768
__do_fault+0x138/0x390 mm/memory.c:5363
do_read_fault mm/memory.c:5798 [inline]
do_fault mm/memory.c:5932 [inline]
do_pte_missing+0x228f/0x3750 mm/memory.c:4477
handle_pte_fault mm/memory.c:6316 [inline]
__handle_mm_fault mm/memory.c:6454 [inline]
handle_mm_fault+0x1bec/0x3310 mm/memory.c:6623
faultin_page mm/gup.c:1126 [inline]
__get_user_pages+0x165b/0x29d0 mm/gup.c:1428
populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860
__mm_populate+0x25f/0x390 mm/gup.c:1963
mm_populate include/linux/mm.h:3899 [inline]
vm_mmap_pgoff+0x3aa/0x4f0 mm/util.c:586
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff070f9c629
RSP: 002b:00007ff071f16028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007ff071216090 RCX: 00007ff070f9c629
RDX: b635773f07ebbeef RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007ff071032b39 R08: ffffffffffffffff R09: 00000000215e8000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff071216128 R14: 00007ff071216090 R15: 00007ffc19152778
rcu: rcu_preempt kthread starved for 1187 jiffies! g81465 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27664 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x1585/0x5340 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7004
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:467
ret_from_fork+0x51e/0xb90 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: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:nf_hook include/linux/netfilter.h:274 [inline]
RIP: 0010:NF_HOOK+0x22a/0x3c0 include/linux/netfilter.h:316
Code: 48 8b 44 24 28 48 89 84 24 88 00 00 00 48 8b 7c 24 20 4c 89 ee 4c 89 f2 31 c9 e8 01 3b 76 ff 89 c3 43 c7 44 3c 04 f8 f8 f8 f8 <66> 43 c7 44 3c 08 f8 f8 eb 0a e8 77 2a 76 f7 bb 01 00 00 00 e8 dd
RSP: 0018:ffffc90000a080a0 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88801d2e8000
RDX: 0000000000000100 RSI: ffffffff8fc43120 RDI: 0000000000000002
RBP: ffffc90000a081b0 R08: ffff88801d2e8000 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000100 R12: 1ffff9200014101c
R13: ffffc90000a08100 R14: ffff8880337c9b00 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888125566000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555592c7a4e8 CR3: 000000000e54c000 CR4: 00000000003526f0
Call Trace:
__netif_receive_skb_one_core net/core/dev.c:6154 [inline]
__netif_receive_skb net/core/dev.c:6267 [inline]
netif_receive_skb_internal net/core/dev.c:6353 [inline]
netif_receive_skb+0x278/0xc50 net/core/dev.c:6412
NF_HOOK+0xa4/0x3a0 include/linux/netfilter.h:319
br_handle_frame_finish+0x14b2/0x1b40 net/bridge/br_input.c:-1
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0xa3a/0xd70 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x374/0x6f0 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x1277/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x98f/0x31a0 net/core/dev.c:6041
__netif_receive_skb_one_core net/core/dev.c:6152 [inline]
__netif_receive_skb net/core/dev.c:6267 [inline]
process_backlog+0x76d/0x1950 net/core/dev.c:6619
__napi_poll+0xae/0x340 net/core/dev.c:7683
napi_poll net/core/dev.c:7746 [inline]
net_rx_action+0x627/0xf70 net/core/dev.c:7898
handle_softirqs+0x22a/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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+0xa6/0xc0 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+0xce5/0x12c0 kernel/smp.c:877
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 24 e3 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cf de 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 b3 de
RSP: 0018:ffffc90000117720 EFLAGS: 00000293
RAX: ffffffff81b9addd RBX: 1ffff110170c8515 RCX: ffff88801d2e8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000117860 R08: ffffffff901172b7 R09: 1ffffffff2022e56
R10: dffffc0000000000 R11: fffffbfff2022e57 R12: ffff8880b86428a8
R13: dffffc0000000000 R14: ffff8880b873bf80 R15: 0000000000000000
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043
on_each_cpu include/linux/smp.h:72 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2746 [inline]
smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2956
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:899
process_one_work kernel/workqueue.c:3275 [inline]
process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358
worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
kthread+0x388/0x470 kernel/kthread.c:467
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
net_ratelimit: 31535 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 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:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fa:5f:10:2b:2c:78, 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: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)
lec0: NETDEV WATCHDOG: CPU: 1: transmit queue 0 timed out 5010 ms
lec:lec_tx_timeout: lec0
lec:lec_start_xmit: lec0:No lecd attached
net_ratelimit: 40635 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fa:5f:10:2b:2c:78, 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 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 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: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:aa:aa:aa:aa:aa:0c, vlan:0)
lec0: NETDEV WATCHDOG: CPU: 1: transmit queue 0 timed out 5010 ms
lec:lec_tx_timeout: lec0
lec:lec_start_xmit: lec0:No lecd attached