bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5281/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=433981, q=1496 ncpus=2)
task:dhcpcd state:R running task stack:23312 pid:5281 tgid:5281 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7552
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0x11f/0x2550 arch/x86/kernel/unwind_orc.c:498
Code: 6c 24 38 48 89 5c 24 40 49 8d 5e 50 48 89 d8 48 c1 e8 03 48 89 44 24 28 42 80 3c 20 00 74 08 48 89 df e8 14 a8 ba 00 48 8b 1b <48> 85 db 74 24 48 81 c3 88 00 00 00 48 89 d8 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc9000205f600 EFLAGS: 00000246
RAX: 1ffff9200040bedf RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8c291100 RDI: ffffffff8c2910c0
RBP: 1ffff9200040bedc R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000205f6f8 R11: ffffffff81b10630 R12: dffffc0000000000
R13: ffffffff8176a21f R14: ffffc9000205f6a8 R15: 1ffff9200040bed5
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
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1397 [inline]
__free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
__slab_free+0x274/0x2c0 mm/slub.c:5672
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:4610 [inline]
slab_alloc_node mm/slub.c:4939 [inline]
__do_kmalloc_node mm/slub.c:5333 [inline]
__kmalloc_noprof+0x312/0x750 mm/slub.c:5347
_kmalloc_noprof include/linux/slab.h:973 [inline]
tomoyo_realpath_from_path+0xef/0x640 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x246/0x5f0 security/tomoyo/file.c:728
security_file_ioctl+0xc3/0x2a0 security/security.c:2512
__do_sys_ioctl fs/ioctl.c:591 [inline]
__se_sys_ioctl+0x47/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3018329378
RSP: 002b:00007fffe79c0248 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00005626734ec8b0 RCX: 00007f3018329378
RDX: 00007fffe79c0250 RSI: 0000000000008921 RDI: 000000000000000f
RBP: 00007fffe79c0250 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00005626734f5aa0
R13: 00005626734ec8b0 R14: 00005626734f5aa0 R15: 00007fffe79c04a0
rcu: rcu_preempt kthread starved for 6837 jiffies! g433981 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:27544 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5504 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
__schedule_loop kernel/sched/core.c:7307 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7322
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
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: 1 UID: 0 PID: 3784 Comm: kworker/u8:24 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: krds_cp_wq#35/0 rds_connect_worker
RIP: 0010:unwind_next_frame+0x48a/0x2550 arch/x86/kernel/unwind_orc.c:-1
Code: 6a 05 48 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 b4 19 00 00 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 bf 19 00 00 <0f> b6 43 01 83 e0 07 0f 84 7c 16 00 00 83 f8 01 4c 8b 6c 24 50 49
RSP: 0018:ffffc90000a07ca0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff90ca51d4 RCX: ffffffff904d1a60
RDX: ffffffff90ca51d0 RSI: ffffffff90ca51b2 RDI: ffffffff8c2910c0
RBP: ffffffff81b105c8 R08: 0000000000000006 R09: 0000000000000000
R10: ffffc90000a07d98 R11: ffffffff81b10630 R12: dffffc0000000000
R13: ffffffff90ca51d5 R14: ffffc90000a07d48 R15: ffffffff904d1a60
FS: 0000000000000000(0000) GS:ffff88812537b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562c1645da10 CR3: 000000007e4f6000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4610 [inline]
slab_alloc_node mm/slub.c:4939 [inline]
kmem_cache_alloc_noprof+0x2b8/0x650 mm/slub.c:4946
skb_ext_maybe_cow net/core/skbuff.c:7112 [inline]
skb_ext_add+0x1b6/0x8e0 net/core/skbuff.c:7187
nf_bridge_unshare net/bridge/br_netfilter_hooks.c:170 [inline]
br_nf_forward_ip+0xc3/0xa30 net/bridge/br_netfilter_hooks.c:686
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:273 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:316
__br_forward+0x397/0x540 net/bridge/br_forward.c:115
br_handle_frame_finish+0x1175/0x1990 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:318 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x127f/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x989/0x30b0 net/core/dev.c:6093
__netif_receive_skb_one_core net/core/dev.c:6204 [inline]
__netif_receive_skb net/core/dev.c:6319 [inline]
process_backlog+0x706/0x1860 net/core/dev.c:6670
__napi_poll+0xaa/0x330 net/core/dev.c:7729
napi_poll net/core/dev.c:7792 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:7949
handle_softirqs+0x225/0x840 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: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:arch_try_cmpxchg128 arch/x86/include/asm/cmpxchg_64.h:-1 [inline]
RIP: 0010:__update_freelist_fast mm/slub.c:652 [inline]
RIP: 0010:slab_update_freelist mm/slub.c:718 [inline]
RIP: 0010:__slab_free+0xc3/0x2c0 mm/slub.c:5623
Code: c0 74 41 45 31 e4 41 f6 46 0a 20 74 66 48 8b 44 24 40 48 8b 54 24 48 48 89 de 48 8b 5c 24 30 48 8b 4c 24 38 f0 48 0f c7 4e 20 <48> 89 f3 0f 84 e8 00 00 00 48 89 44 24 40 48 89 54 24 48 f3 90 e9
RSP: 0018:ffffc90005a6f520 EFLAGS: 00000242
RAX: ffff8880422d13c0 RBX: ffff8880422d1280 RCX: 00000008000c000a
RDX: 00000008000c000b RSI: ffffea000108b440 RDI: ffff88801deca780
RBP: ffffc90005a6f5b0 R08: 0000000000000000 R09: ffffffff82315cae
R10: dffffc0000000000 R11: fffffbfff206229f R12: 0000000000000000
R13: ffff8880422d13c0 R14: ffff88801deca780 R15: 0000000000000000
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_kmalloc+0x22/0xb0 mm/kasan/common.c:406
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x318/0x660 mm/slub.c:5451
_kmalloc_noprof include/linux/slab.h:969 [inline]
_kzalloc_noprof include/linux/slab.h:1286 [inline]
ref_tracker_alloc+0x15b/0x4b0 lib/ref_tracker.c:270
__netns_tracker_alloc include/net/net_namespace.h:367 [inline]
netns_tracker_alloc include/net/net_namespace.h:376 [inline]
get_net_track+0x16e/0x230 include/net/net_namespace.h:393
sk_net_refcnt_upgrade+0xb2/0x130 net/core/sock.c:2402
rds_tcp_tune+0x44e/0x920 net/rds/tcp.c:529
rds_tcp_conn_path_connect+0x2fa/0x920 net/rds/tcp_connect.c:137
rds_connect_worker+0x1d8/0x290 net/rds/threads.c:176
process_one_work kernel/workqueue.c:3314 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
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: 23507 callbacks suppressed
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)