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 veth1_to_bridge with own address as source address (addr:be:0b:04:54:f3:3a, 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: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)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4981/1:b..l..
rcu: (detected by 0, t=10502 jiffies, g=68881, q=1082 ncpus=1)
task:udevd state:R running task stack:24568 pid:4981 tgid:4981 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x125e/0x6990 kernel/sched/core.c:7382
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7662
irqentry_exit_cond_resched arch/x86/include/asm/fred.h:105 [inline]
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:453 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x33f/0xab0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 0f a1 ce 13 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 1e 5f 80 10 0f 82 c9 02 00 00 8b 35 de 8e 80 10 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 ad a0 ce 13 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc90005b177d8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8e5f4e6e RDI: ffffffff8c830780
RBP: ffffffff8ffeb420 R08: 0000000040f98d7a R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
__unwind_start+0x3cd/0x7e0 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x73/0xf0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:183
__reset_page_owner+0x85/0x230 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1401 [inline]
__free_frozen_pages+0x7b4/0x1110 mm/page_alloc.c:2952
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
kmem_cache_alloc_noprof+0x269/0x6a0 mm/slub.c:5047
alloc_filename fs/namei.c:147 [inline]
do_getname+0x35/0x390 fs/namei.c:187
getname include/linux/fs.h:2562 [inline]
getname_maybe_null include/linux/fs.h:2569 [inline]
class_filename_maybe_null_constructor include/linux/fs.h:2593 [inline]
vfs_fstatat+0xd0/0xe0 fs/stat.c:372
__do_sys_newfstatat+0x9d/0x120 fs/stat.c:542
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1cdbf11b0a
RSP: 002b:00007fff9360f2a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00005606318d7430 RCX: 00007f1cdbf11b0a
RDX: 00007fff9360f2b0 RSI: 00005606318c5ee9 RDI: 00000000ffffff9c
RBP: 0000560640716668 R08: 00063478c1c69200 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff9360f2b0 R14: 0000000000000000 R15: 00063478c1c69200
rcu: rcu_preempt kthread starved for 808 jiffies! g68881 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:28968 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x125e/0x6990 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7474
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x930 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x179/0x260 kernel/rcu/tree.c:2330
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 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: 3225 Comm: kworker/R-bat_e Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:rcu_is_watching+0x5/0xc0 kernel/rcu/tree.c:749
Code: cc 90 0f 0b 90 5b e9 9a 92 f9 09 e8 c5 74 95 00 eb cd 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <53> 65 48 ff 05 3a 07 c6 13 e8 9d 52 f6 09 48 c7 c3 28 01 b9 95 89
RSP: 0018:ffffc90000007330 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000000e6a RCX: 0000000000000101
RDX: ffff88803624a580 RSI: ffffffff8ab740a7 RDI: ffff88803624a580
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff8ab73a20 R14: ffff88803c838000 R15: ffff888039711380
FS: 0000000000000000(0000) GS:ffff8881224a4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd2bbdcf50 CR3: 0000000044440000 CR4: 00000000003526f0
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
nf_hook.constprop.0+0x48c/0x6b0 include/linux/netfilter.h:282
NF_HOOK include/linux/netfilter.h:323 [inline]
br_pass_frame_up+0x309/0x490 net/bridge/br_input.c:70
br_handle_frame_finish+0xab2/0x1ff0 net/bridge/br_input.c:237
br_nf_hook_thresh+0x30d/0x420 net/bridge/br_netfilter_hooks.c:1166
br_nf_pre_routing_finish_ipv6+0x662/0xde0 net/bridge/br_netfilter_ipv6.c:153
NF_HOOK include/linux/netfilter.h:325 [inline]
br_nf_pre_routing_ipv6+0x39b/0x8b0 net/bridge/br_netfilter_ipv6.c:183
br_nf_pre_routing+0x8b4/0x1510 net/bridge/br_netfilter_hooks.c:514
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:293 [inline]
br_handle_frame+0xd59/0x1660 net/bridge/br_input.c:453
__netif_receive_skb_core.constprop.0+0x736/0x35a0 net/core/dev.c:6292
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6403
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6518
process_backlog+0x487/0x1600 net/core/dev.c:6869
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7938
napi_poll net/core/dev.c:8001 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:8158
handle_softirqs+0x216/0xa20 kernel/softirq.c:669
do_softirq kernel/softirq.c:569 [inline]
do_softirq+0xaf/0xf0 kernel/softirq.c:556
__local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2880 [inline]
batadv_tt_purge+0x283/0xc00 net/batman-adv/translation-table.c:4270
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3495
process_scheduled_works kernel/workqueue.c:3578 [inline]
rescuer_thread+0x951/0x16e0 kernel/workqueue.c:3803
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245