bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8688/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=63229, q=502 ncpus=2)
task:kworker/u4:15   state:R  running task     stack:21736 pid:8688  ppid:2      flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x30 kernel/rcu/update.c:318
Code: d2 06 04 00 75 e8 48 c7 c7 a0 c7 ca 8a 48 c7 c6 c0 eb ca 8a e8 e1 94 cc f6 0f 0b eb d1 cc cc cc cc cc cc cc cc cc cc cc cc cc <f3> 0f 1e fa 31 c0 83 3d ff 9e 06 04 00 74 1d 83 3d 86 d2 06 04 00
RSP: 0018:ffffc9000c9bfb58 EFLAGS: 00000296
RAX: 0387ea9b1d49a500 RBX: ffff888061fb4400 RCX: 0387ea9b1d49a500
RDX: 0000000000000000 RSI: ffffffff8acada80 RDI: ffffffff8b1c81e0
RBP: ffff88804875cff8 R08: dffffc0000000000 R09: 1ffffffff2237ea0
R10: dffffc0000000000 R11: fffffbfff2237ea1 R12: dffffc0000000000
R13: ffffffff8a4bc332 R14: ffff88807a1d4c80 R15: 00000000000001ff
 rcu_read_lock include/linux/rcupdate.h:787 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0xf8/0x610 net/batman-adv/network-coding.c:719
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 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
 </TASK>
rcu: rcu_preempt kthread starved for 6777 jiffies! g63229 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:26824 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x313/0x1590 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 13491 Comm: syz.1.2649 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:unwind_next_frame+0x9c6/0x2970 arch/x86/kernel/unwind_orc.c:521
Code: 01 0f 85 af 03 00 00 e8 e8 d4 4b 00 49 89 df e9 d1 03 00 00 e8 db d4 4b 00 4d 8d 74 24 40 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 f7 e8 10 fc a3 00 49 8b 16 4c 8d 73 01 48 89 d8 48 c1
RSP: 0018:ffffc90000006bf8 EFLAGS: 00000246
RAX: 1ffff92000000da1 RBX: ffffffff8fab0968 RCX: ffff888023020000
RDX: 0000000000000100 RSI: ffffffff8cfa0760 RDI: 0000000000000004
RBP: ffffc90000006d18 R08: ffff888023020000 R09: 0000000000000008
R10: 0000000000000009 R11: 0000000000000100 R12: ffffc90000006cc8
R13: dffffc0000000000 R14: ffffc90000006d08 R15: ffffffff8fab096c
FS:  00007f123986e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33c21ff8 CR3: 0000000068c80000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 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+0x2e/0x50 mm/kasan/generic.c:522
 ____kasan_slab_free+0x126/0x1e0 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+0xf8/0x270 mm/slub.c:3852
 netlink_broadcast_filtered+0x101c/0x1110 net/netlink/af_netlink.c:1538
 netlink_broadcast net/netlink/af_netlink.c:1560 [inline]
 nlmsg_multicast include/net/netlink.h:1090 [inline]
 nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2588
 br_fdb_update+0x476/0x630 net/bridge/br_fdb.c:904
 br_handle_frame_finish+0x5fc/0x19b0 net/bridge/br_input.c:141
 br_nf_hook_thresh+0x3cd/0x4a0 net/bridge/br_netfilter_hooks.c:1184
 br_nf_pre_routing_finish_ipv6+0x9dc/0xd00 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:304 [inline]
 br_nf_pre_routing_ipv6+0x349/0x6b0 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+0x96b/0x14e0 net/bridge/br_input.c:424
 __netif_receive_skb_core+0xfab/0x3af0 net/core/dev.c:5545
 __netif_receive_skb_one_core net/core/dev.c:5649 [inline]
 __netif_receive_skb+0x74/0x290 net/core/dev.c:5765
 process_backlog+0x396/0x700 net/core/dev.c:6093
 __napi_poll+0xc0/0x460 net/core/dev.c:6655
 napi_poll net/core/dev.c:6722 [inline]
 net_rx_action+0x616/0xc50 net/core/dev.c:6859
 handle_softirqs+0x280/0x820 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:check_kcov_mode kernel/kcov.c:193 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x60 kernel/kcov.c:216
Code: 00 a1 7c 7e 65 8b 15 01 a1 7c 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc
RSP: 0018:ffffc900041e7958 EFLAGS: 00000246
RAX: ffffffff817cccf5 RBX: 0000000004c3a000 RCX: ffff888023020000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900041e7ab0 R08: ffff888023020000 R09: 0000000000000003
R10: 0000000000000002 R11: 0000000000000000 R12: ffffc900041e7a00
R13: ffff88802e4c0b00 R14: dffffc0000000000 R15: 00007f1237bf9000
 acct_collect+0x205/0x790 kernel/acct.c:599
 do_exit+0x863/0x2460 kernel/exit.c:853
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 get_signal+0x12fc/0x13f0 kernel/signal.c:2902
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f123899aeb9
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:00007f123986e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f1238c15fa8 RCX: 00007f123899aeb9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f1238c15fac
RBP: 00007f1238c15fa0 R08: 0000000000745b01 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1238c16038 R14: 00007ffff03c1350 R15: 00007ffff03c1438
 </TASK>
net_ratelimit: 2878 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:4a:bc:ee:57:8a:b8, vlan:0)