bridge0: received packet on veth1_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): P18144/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=76241, q=2302 ncpus=2)
task:syz.3.3299 state:R running task stack:25416 pid:18144 tgid:18143 ppid:17021 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:839 [inline]
RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
RIP: 0010:unwind_next_frame+0xd0/0x2550 arch/x86/kernel/unwind_orc.c:495
Code: 48 c7 c7 a0 cd 95 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 41 57 e8 bd c2 2a 00 48 83 c4 08 e8 14 e8 31 0a 85 c0 74 3a 1b eb 33 00 84 c0 75 31 e8 02 e8 31 0a 85 c0 74 28 80 3d c4 a2
RSP: 0018:ffffc9000372f3b8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff81000130 RCX: ffff888031bebd80
RDX: 0000000059298cfa RSI: ffffffff8e21a686 RDI: ffffffff8c28af60
RBP: dffffc0000000000 R08: ffffffff8176f256 R09: ffffffff8e95cda0
R10: ffffc9000372f4d8 R11: ffffffff81b0efc0 R12: ffffc9000372f4c0
R13: 1ffff920006e5e91 R14: ffffc9000372f488 R15: ffffffff8176f256
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
__call_rcu_common kernel/rcu/tree.c:3131 [inline]
call_rcu+0xee/0x890 kernel/rcu/tree.c:3251
kernfs_put+0x259/0x520 fs/kernfs/dir.c:618
kernfs_remove_by_name_ns+0xc8/0x140 fs/kernfs/dir.c:1799
kernfs_remove_by_name include/linux/kernfs.h:639 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0xfc/0x2e0 fs/sysfs/group.c:328
sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:352
destroy_gid_attrs drivers/infiniband/core/sysfs.c:1138 [inline]
ib_free_port_attrs+0xc5/0x3b0 drivers/infiniband/core/sysfs.c:1362
remove_one_compat_dev drivers/infiniband/core/device.c:1011 [inline]
rdma_dev_exit_net+0x1de/0x350 drivers/infiniband/core/device.c:1149
ops_exit_list net/core/net_namespace.c:199 [inline]
ops_undo_list+0x49f/0x940 net/core/net_namespace.c:252
setup_net+0x2f0/0x340 net/core/net_namespace.c:462
copy_net_ns+0x50e/0x730 net/core/net_namespace.c:579
create_new_namespaces+0x3e7/0x6a0 kernel/nsproxy.c:132
unshare_nsproxy_namespaces+0x149/0x190 kernel/nsproxy.c:234
ksys_unshare+0x57d/0x9f0 kernel/fork.c:3243
__do_sys_unshare kernel/fork.c:3317 [inline]
__se_sys_unshare kernel/fork.c:3315 [inline]
__x64_sys_unshare+0x38/0x50 kernel/fork.c:3315
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: 0033:0x7f340e59ce59
RSP: 002b:00007f340c7f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f340e815fa0 RCX: 00007f340e59ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000064000600
RBP: 00007f340e632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f340e816038 R14: 00007f340e815fa0 R15: 00007ffd69e699d8
rcu: rcu_preempt kthread starved for 1411 jiffies! g76241 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:28152 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
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+0x389/0x470 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: 3230 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: bat_events batadv_dat_purge
RIP: 0010:unwind_next_frame+0x67/0x2550 arch/x86/kernel/unwind_orc.c:486
Code: 10 ba 00 48 89 5c 24 10 49 8b 5e 48 4d 8d 66 38 4c 89 e0 48 c1 e8 03 48 89 44 24 58 80 3c 28 00 74 08 4c 89 e7 e8 e9 0f ba 00 <4d> 8b 7e 38 4d 89 f5 49 c1 ed 03 41 0f b6 44 2d 00 84 c0 0f 85 c6
RSP: 0018:ffffc90000a076b8 EFLAGS: 00000246
RAX: 1ffff92000140ef8 RBX: ffffffff8980c15d RCX: 0000000080000100
RDX: dffffc0000000000 RSI: ffffffff8980c15d RDI: ffffc90000a07788
RBP: dffffc0000000000 R08: ffffc90000a07850 R09: 000000000000000f
R10: ffffc90000a077d8 R11: ffffffff81b0efc0 R12: ffffc90000a077c0
R13: 0000000000000000 R14: ffffc90000a07788 R15: ffffc90000a07788
FS: 0000000000000000(0000) GS:ffff88812538a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558f6804e8 CR3: 000000007a7d2000 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
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2689 [inline]
slab_free mm/slub.c:6250 [inline]
kmem_cache_free+0x182/0x650 mm/slub.c:6377
consume_skb net/core/skbuff.c:1436 [inline]
skb_pp_cow_data+0x1395/0x19b0 net/core/skbuff.c:1000
netif_skb_check_for_xdp net/core/dev.c:5557 [inline]
netif_receive_generic_xdp net/core/dev.c:5598 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5666
__netif_receive_skb_core+0x10e5/0x3170 net/core/dev.c:6012
__netif_receive_skb_one_core net/core/dev.c:6200 [inline]
__netif_receive_skb net/core/dev.c:6315 [inline]
netif_receive_skb_internal net/core/dev.c:6401 [inline]
netif_receive_skb+0x1fe/0xbf0 net/core/dev.c:6460
NF_HOOK+0xa4/0x3a0 include/linux/netfilter.h:318
br_handle_frame_finish+0x1541/0x1c80 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+0x91f/0xc30 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: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+0x1277/0x1510 net/bridge/br_input.c:442
__netif_receive_skb_core+0x98f/0x3170 net/core/dev.c:6089
__netif_receive_skb_one_core net/core/dev.c:6200 [inline]
__netif_receive_skb net/core/dev.c:6315 [inline]
process_backlog+0x76d/0x1950 net/core/dev.c:6666
__napi_poll+0xae/0x340 net/core/dev.c:7733
napi_poll net/core/dev.c:7796 [inline]
net_rx_action+0x627/0xf70 net/core/dev.c:7953
handle_softirqs+0x22a/0x840 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
spin_unlock_bh include/linux/spinlock.h:396 [inline]
__batadv_dat_purge net/batman-adv/distributed-arp-table.c:185 [inline]
batadv_dat_purge+0x2da/0x3c0 net/batman-adv/distributed-arp-table.c:204
process_one_work kernel/workqueue.c:3314 [inline]
process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3397
rescuer_thread+0x827/0x1130 kernel/workqueue.c:3621
kthread+0x389/0x470 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
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:0c, vlan:0)
bridge0: received packet on veth1_to_bridge 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)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)